a a This document is b WARD-4173-2 UC-25 Metals, Ceramics, and Materials SODIUM TECHNOLOGY PROGRAM QUARTERLY PROGRESS REPORT FOR THE PERIOD ENDING JUNE 30, 1970 Approved by: W. E. Ray Principal Investigator Project Manager THIS DOCUMENT CONFIRMED AS UPlCLASSlFt ED Contract AT(30-11-4173 U. S. Atomic Energy Commission Submitted to AEC/NYOO August 1970 Westinghouse Electric Corporation Advanced Reactors Division Madison, Pennsylvania 15663 P. 0. Box 158
Transcript
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a
This document is
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WARD-4173-2 UC-25 Metals, Ceramics, and Materials
SODIUM TECHNOLOGY PROGRAM QUARTERLY PROGRESS REPORT
FOR THE PERIOD ENDING JUNE 30, 1970
Approved by: W. E. Ray Principal Investigator
Project Manager
THIS DOCUMENT CONFIRMED AS UPlCLASSlFt ED
Contract AT(30-11-4173 U. S. Atomic Energy Commission
Submitted to AEC/NYOO August 1970
Westinghouse Electric Corporation Advanced Reactors Division
Madison, Pennsylvania 15663 P. 0. Box 158
DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document.
LCGAI. NOTICI:
This report w a s prepared a s a n a c c o u n t of Government s p o n s o r e d work . Nei ther t h e United S t a t e s , nor t h e C o m m i s s i o n , nor a n y person a c t i n g o n behalf of t h e Commiss ion:
A . M a k e s a n y warran ty or r e p r e s e n t a t i o n , e x p r e s s e d or i m p l i e d , with r e s p e c t t o t h e a c c u r a c y , c o m p l e t e n e s s , or u s e f u l n e s s of t h e information conta ined in t h i s repor t , or t h a t t h e u s e of a n y information, a p p a r a t u s , method, or p r o c e s s d i s c l o s e d in t h i s report may not in f r inge pr iva te ly owned r igh ts : o r
B . Assumes a n y l i a b i l i t i e s with r e s p e c t t o t h e u s e of , or for d a m a g e s r e s u l t i n g from t h e use of a n y informat ion , a p p a r a t u s , method, or p r o c e s s d i s c l o s e d in t h i s repor t .
As used in t h e a b o v e , " p e r s o n a c t i n g o n behalf of t h e Commiss ion" i n c l u d e s a n y employe or cont rac tor of t h e C o m m i s s i o n , or employe of s u c h c o n t r a c t o r , t o t h e ex ten t tha t s u c h employe or cont rac tor of t h e C o m m i s s i o n , or employe of s u c h cont rac tor p r e p a r e s , d i s s e m i n a t e s , or provides a c c e s s t o , a n y information pursuant t o h i s employment or c o n t r a c t with t h e C o m m i s s i o n , or h i s employment with s u c h cont rac tor .
Printed i n t h e United S t a t e s of America Avai lab le from
C l e a r i n g h o u s e for Federal S c i e n t i f i c a n d T e c h n i c a l Information Nat iona l Bureau of S t a n d a r d s , U . S. Depar tment of Commerce
G e n e r a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Summary of O b j e c t i v e s ........................................ Background ................................................... Summary of Curren t P r o g r e s s .................................. Summary of P r i o r Work. .......................................
2 NCAA-100 P r o j e c t A d m i n i s t r a t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
O b j e c t i v e s ................................................... P r i o r Work................................................... Current P r o g r e s s .............................................
5 5 5
3 NCAA-200 I n t e r s t i t i a l T r a n s p o r t i n Sodium Systems ............ 6
O b j e c t i v e s ................................................... P r i o r W o r k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . ......... Current P r o g r e s s .............................................
6 6 8
4 NCAA-300 Sodium Corros ion of Weldments and Brazements . . . . . . . . 14
O b j e c t i v e s ................................................... P r i o r Work .................................................... Current P r o g r e s s .............................................
14 1 4 1 5
5 NCAA-400 Mechanical P r o p e r t i e s of S t r u c t u r a l Materials i n Sodium....................................................... 17
O b j e c t i v e s ................................................... P r i o r Work ................................................... Current P r o g r e s s .............................................
17 17 1 7
6 NCAA-600 S p e c i a l Components Mechanical P r o p e r t i e s i n Sodium.. 35
35 35 35
O b j e c t i v e .................................................... P r i o r W o r k . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Curren t P r o g r e s s .............................................
38 7 Summary of Work P l a n P r e p a r a t i o n ............................. I .............................. 39 8 L i s t of References .............
___ -- L E G A L N O T I C E
This report wa8 prepared 86 an account of Governrdent sponsored work. Neither the United States, nor the Commiseion, nor any person acting on behalf of the Commission:
A. ~ r & e s m y warranty or representation, espressed or implied. ulth respect to the accu- racy, completeness, or usefulness of the informatlo" contained In thls report, o r that the Use of any information, appmatus, method. or process disclosed In thls report may not infringe privately owned rights: or
B. Assumes any liabilities with respect to the use of, or for damages resulung from the use of any Information. apparatus, method. or process disclosed in this report.
As used in the above. "person acting on behalf of the Commission" includes any em- ployee or contractor of the Commission. or employke of such contractor. to the extent that such employee or contractor of the Commission, 0; employee of such contractor p r e p r e s , disseminates, or provides access to. any information pursuant to his employment or contract
the commission, or hls employment with such contractor. iii
DISTRlBUTION OF THIS DOCUMENT IS UNL-D A
LIST OF FIGURES L
Figure
1 Control Panel for CEL-1 and C E L - 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 CEL-1 After Completion of Loop Welding Operation ............. 3 Vacuum Distillation Unit Attached to C E L - l . . . . . . . . . . . . . . . . . . .
5 Corrosion Rate Data for Annealed Type 316 Stainless Steel....
6 Photomicrographs of Annealed 316 Stainless Steel Tube Sample (OD Surface) After 5049 Hours in Flowing Sodium at 1215°F (500x) .......................................................
7 Photomicrographs of Annealed 316 Stainless Steel Tube Samples (OD Surface) After 5049 Hours in Flowing Sodium at 1315°F (500x) .......................................................
8 MPS Sodium Loop with Modified #1 Cold Trap System ............ 9 MPS Sodium Loop with Modified #2 Final Cold Trap Modification
10 Stress-Relaxation Curves Obtained for Annealed 316 Stainless Steel Rod at 1200°F in Flowing Sodium........................
11 Loading Curves for Stress-Relaxation Tests...................
12 Creep-Rupture Curve for Annealed Type 316 Stainless Steel at 1200°F and 43.200 PSI in Flowing Sodium (MPS-2) ..............
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LIST OF TABLES
Tab le Page
1 Sodium Analysis Results for Pre-Exposure Loop (PEL-1-1) ...... 19
2 Chemical, Metallurgical, and Tensile Evaluations to be Performed for PEL-1-1 Test Samples After 5,049 hours at 1215°F and 13.15"F in Flowing Sodium.......................... 22
4 Sodium Analyses and Conditions for M P S Operation(a1 .......... 29
PV
i SECTION 1
INTRODUCTION
GENERAL
This is the second quarterly progress report on work being performed during FY-1970 under AEC Contract AT(30-1)-4173, "Compatibility of Structural Materials with Sodium," and covers the work performed from April 1, 1970 to June 30, 1970. It should be noted that the major technical effort was confined to April and May. Late in May, a request was received from the Commission to prepare new work plans in selected areas of the national sodium technology program. Since this was a priority assignment, taking precedence over current milestones, existing shop orders were closed and efforts were directed toward the preparation of the work plans. Only the construction of the Carbon Equilibrium Loops (CEL) was continued during June since this entailed equipment rather than program funds.
A brief summary of the work plan preparation e f fo r t is given in Section 7 of this report.
SUMMARY OF OBJECTIVES
The overall objective of this project is to generate a better understanding of the effect of FFTF and LMFBR sodium environments on the reference structural materials used in those systems, and translate that information into data which the designer can use to quantitatively allow for sodium- materials incompatibilities.
The project consists of one administrative and four technical tasks as follows :
NCAA-100 Project Administration
NCAA-200 Interstitial Transport in Sodium Systems
NCAA-300 Sodium Corrosion of Weldments and Brazements
NCAA-400 Mechanical Properties of Structural Materials in Sodium
NCAA-600 Special Components Mechanical Properties in Sodium
BACKGROUND
The Westinghouse Advanced Reactors Division (ARD) has maintained an expanding company-sponsored sodium technology program since 1967, with particular emphasis on sodium-materials compatibility studies. By early
encompassed nine small pumped loops and several projects covering:
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_ I FY-1970, the sodium-materials compatibility portion of this program
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1. Demonstrat ion p l a n t c o r r o s i o n mock-up s t u d i e s
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3. Sodium c o r r o s i o n s of weldments and brazements
4 . E f f e c t s of sodium on mechanical p r o p e r t i e s of s
Carbon and n i t r o g e n t r a n s f e r i n sodium sys tems
cuc i ra l materials
During t h e second q u a r t e r of FY-1970 t h e Coolant Chemistry Branch of t h e AEC a u t h o r i z e d p r e p a r a t i o n of a work program under C o n t r a c t AT(30-1)-4169, which i n c o r p o r a t e d p o r t i o n s of t h e above work, t o g e t h e r w i t h new scope i n t o a f i v e - y e a r p l a n of sodium-mater ia ls c o m p a t i b i l i t y e n g i n e e r i n g s t u d i e s . The p r e s e n t c o n t r a c t funds major p o r t i o n s of t h a t p l a n through t h e b a l a n c e of FY-1970.
I n s o doing , t h e c o n t r a c t i n c o r p o r a t e s on-going e f f o r t i n c e r t a i n a r e a s d e t a i l e d i n t h e body of t h i s r e p o r t under Tasks NCAA-300 and -400. NCAA-200 and -600 r e p r e s e n t new scope; NCAA-200 e n t a i l s new f a c i l i t i e s which are funded i n p a r t by Westinghouse and i n p a r t by t h e AEC.
Tasks
A clear o b j e c t i v e of t h i s c o n t r a c t i s t o m a i n t a i n c o n s t a n t l i a i s o n w i t h b o t h FFTF and LMFBR d e s i g n groups t o e n s u r e t h a t g e n e r a t e d d a t a w i l l have a maximum u t i l i t y t o t h e s e p r o j e c t s . Design requi rement reviews and i n p u t s from o t h e r s o u r c e s , such as t h e LMEC, w i l l b e c o n t i n u a l l y monitored. A l l e x p e r i m e n t a t i o n w i l l b e planned t o f a c i l i t a t e e x t r a p o l a t i o n of r e s u l t s t o f u l l scale sys tems.
A major c o n s t r a i n t i n t h e e x e c u t i o n of t h i s c o n t r a c t is t h e need t o monitor sodium q u a l i t y by methods which can b e r e l a t e d t o o t h e r programs and r e a c t o r o p e r a t i o n s ; e x t e n s i v e use w i l l b e made of on- l ine meters. Sodium a n a l y t i c a l t e c h n i q u e s w i l l b e c o o r d i n a t e d w i t h t h e Sodium Technology Group a t ANL, who are a s s i g n e d r e s p o n s i b i l i t y f o r deve loping r e f e r e n c e sodium a n a l y t i c a l p rocedures . Although t h i s phase of t h e c o n t r a c t e f f o r t a p p l i e s t o a l l t a s k s , t h e work w i l l b e c o n s o l i d a t e d and r e p o r t e d under Task NCAA-200, s i n c e i t h a s major r e l e v a n c e i n t h a t area.
SUMMARY OF PRIOR WORK
A l l work r e l a t e d t o t h e p r e s e n t i n v e s t i g a t i o n and performed p r i o r t o t h e p r e s e n t p e r i o d h a s been f u l l y r e p o r t e d i n WARD-4173-1 "Sodium Technology Program Q u a r t e r l y P r o g r e s s Report f o r t h e P e r i o d Ending March 31, 1970."
SUMMARY OF CURRENT PROGRESS
NCAA-200 I n t e r s t i t i a l T r a n s p o r t i n .Sodium Systems
Experimental P l a n s - No s i g n i f i c a n t change h a s been made i n t h e e x p e r i m e n t a l program d e t a i l e d i n t h e p r e v i o u s r e p o r t .
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P Procurement - A l l t h i n f o i l material f o r the experimental program h a s been r e c e i v e d and m e t a l l u r g i c a l c h a r a c t e r i z a t i o n of t h e a l l o y s i s n e a r i n g Q complet ion.
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C o n s t r u c t i o n of t h e CEL c o n t r o l p a n e l and of t h e f i r s t loop (CEL-1) i s a l s o n e a r i n g complet ion. The s t a t u s of on- l ine m e t e r i n g i s as f o l l o w s :
1. Two UNC carbon meter s i d e loops have been ordered .
2. Three e l e c t r o c h e m i c a l carbon meters were o r d e r e d from BNL.
3 , Two electrochemical oxygen meters were o r d e r e d from Westinghouse, which w i l l u s e t h e new high p u r i t y t h o r i a - y t t r i a ceramic e l e c t r o l y t e .
4 . An o r d e r w a s p laced f o r a F i s h e r Gas P a r t i t i o n e r f o r moni tor ing hydrogen, and t h e i n s t r u m e n t was r e c e i v e d .
5. Vol tmeters and r e c o r d e r s f o r d i s p l a y and r e a d o u t of e l e c t r o c h e m i c a l meters have been procured.
6 . An on- l ine vacuum d i s t i l l a t i o n column f o r u s e on CEL-1 h a s been f a b r i c a t e d .
Sodium Sampling and A n a l y s i s - S u b m i t t a l t o ANL of procedures f o r sodium sampling and a n a l y s i s i s proceeding .
NCAA-300 Sodium Corros ion of Weldments and .Brazements
Loop r u n WBTL-2, c o n t a i n i n g s p o t welded and b r a z e d Type 316 s t a i n l e s s s t ee l f u e l p i n s u p p o r t g r i d samples , was t e r m i n a t e d a f t e r 2100 h o u r s of o p e r a t i o n . The samples have been weighed, b u t f u r t h e r e v a l u a t i o n h a s been h a l t e d s i n c e no funding h a s been provided f o r t h i s t a s k i n FY-1971.
The c o n c e p t u a l d e s i g n of WBTL-3 t es t s e c t i o n , which i s t o s t u d y c a v i t a t i o n e f f e c t s i n f u e l rod s u p p o r t g r i d s a t h igh sodium v e l o c i t i e s , h a s been completed b u t d e t a i l i n g h a s n o t p r o g r e s s e d due t o l a c k of funding .
NCAA-400
P r e l i m i n a r y e v a l u a t i o n of t h e samples , removed from t h e Pre-Exposure Loop (PEL-1) a f t e r 5049 h o u r s o p e r a t i o n , h a s r e v e a l e d low c o r r o s i o n ra tes c o n s i s t e n t w i t h t h e low sodium v e l o c i t i e s employed. However, l o s s of i n t e r s t i t i a l e lements (C, N ) had taken p l a c e , which i s a n t i c i p a t e d t o have a d e l e t e r i o u s e f f e c t on mechanical p r o p e r t i e s . of t h e samples is i n p r o g r e s s .
Thermal a g i n g of p a r a l l e l , out-of-sodium samples a t 1200 and 1325'F i s proceeding .
Mechanical P r o p e r t i e s of S t r u c t u r a l Materials i n Sodium
M e t a l l o g r a p h i c e v a l u a t i o n
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The Stress Relaxation Test System (MPS-1) and the Creep Rupture Test System (MPS-2) have been operated to continue debugging procedures. Problems corrected included: clogging of covergas systems, accumulation of entrapped covergas in the cold trap, and nonrepresentative sodium by-pass sampling.
The Strain Cycle Fatigue Test System (MPS-3) loop and test chamber have been essentially completed and will be operated independently for check out.
NCAA-600 SDecial ComDonents Mechanical ProDerties in Sodium
In a series of meetings with FFTF design personnel most of the component areas were reviewed and some potential fractional component configurations requiring evaluation were identified.
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OBJECTIVES
SECTION 2 NCAA - 100 PROJECT ADMINISTRATION
F. A. Brassart, W . B . Heubel, and P. Murray
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The o b j e c t i v e s of t h i s t a s k are t o a s s u r e t h a t t h e p r o j e c t i s s u c c e s s f u l l y completed, on s c h e d u l e , w i t h i n budget , and t o t h e s a t i s f a c t i o n of t h e Atomic Energy Commission; t o a s s u r e compliance w i t h c o n t r a c t e d o b l i g a t i o n s ; and t o c o o r d i n a t e t h i s p r o j e c t w i t h o t h e r AEC and Westinghouse sponsored LMFBR development p r o j e c t s .
Under t h i s t a s k , o v e r a l l p r o j e c t d i r e c t i o n and day-to-day a d m i n i s t r a t i o n w i l l be provided. P l a n s and c o n t r o l s w i l l b e e s t a b l i s h e d and m a i n t a i n e d , periodic reviews will be held with the Commission, correspondences and r e p o r t s w i l l b e c o o r d i n a t e d , and day-to-day t e c h n i c a l and a d m i n i s t r a t i v e l i a i s o n w i t h t h e Commission w i l l be provided .
PRIOR WORK
A u t h o r i z a t i o n f o r work d u r i n g FY-1970 w a s r e c e i v e d from t h e Commission based on t h e work program submi t ted i n December 1969. Although t h i s i s a new AEC sponsored program, i t p i c k s up on-going e f f o r t a t ARD i n c e r t a i n t a s k s .
I n t e r n a l work a u t h o r i z a t i o n and budgets were e s t a b l i s h e d .
CURRENT PROGRESS
Overall p r o j e c t d i r e c t i o n and day-to-day i i a i s o n w i t h t h e AEC cont inued . Schedule 189a/Work P l a n f o r FY-1971 was prepared and submi t ted t o t h e New York Opera t ions O f f i c e .
Q u a r t e r l y p r o g r e s s r e p o r t (WARD-4173-1) f o r t h e p e r i o d ending March 31, 1970 w a s p repared and d i s t r i b u t e d .
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SECTION 3 NCAA-200 INTERSTITIAL TRANSPORT IN SODIUM SYSTEMS
C. Bagnall, E. C. Bishop, B. R. Grundy, S. L. Schrock and S. A . Shiels
OBJECTIVES
The objectives of this program are to provide experimental information and analytical relationships for design data, so that the rate and direction of carbon and nitrogen transfer and associated mechanical property changes of structural materials within liquid metal systems, representative of primary and secondary circuits of a LMFBR, may be predicted.
PRIOR WORK
On-going ARD Program
Westinghouse Advanced Reactors Division has an extensive Westinghouse/ Utility sponsored program in progress to study the mass transfer of the major metallic elements in LMFBR structural materials. The Mass Transfer Loops (MTLs) used in that program are corrosion potential mock-ups of Westinghouse LMFBR primary and secondary systems and are run with hot leg temperatures up to 1325°F and ATs of up to 300'F. hot leg and-Type 304'stainless steel cold leg materials are used'in the primary systems; the secondary system m steel hot leg and Incoloy 800 cold leg. A s part of the MTL program, selected sections of the loop piping are thoroughly examined for evidence of carbon and nitrogen transport. This is done by comparing the interstitial gradients in the exposed material with the gradients in the as-received material.
Type 316 stainless steel
rials are Type 304 stainless
Related Work Outside Westinghouse
The current AEC sponsored interstitial transfer program is part of an overall national program on sodium technology. interfaces with, and in some areas complements, work being carried out at - WADCO, A I , ANL, BNL, and GE. Programs at MSAR and UNC, which have now been terminated, are also relevant to the Westinghouse effort.
In the important area of carbon meter calibration and operation, the Westinghouse program will benefit from past work at UNC and BNL where the meters were developed, and at MSAR where the UEJC meter was used successfully in high carbon environments. The ANL program is perhaps the most extensive one outside Westinghouse. ANL personnel are concentrating primarily on relating carbon transport to chemical species and on adapting experimental meters for on-line use in EBR-11. The meter program particularly is of interest to Westinghouse.
The work at Westinghouse
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The work a t AI, where an investigation will be conducted on the effects of the carbon and nitrogen content in stainless steel on the mechanical properties of the steel, will interface with the work at Westinghouse in
in an equipment design and installation phase. r I
the area of material properties. Work related to this contract, by - WADCO, is
Preparatory Work
During the first half of FY-1970 extensive preparatory work on the interstitial transport program was carried out in anticipation of the current AEC contract. This work involved a preliminary survey of the literature and identification of the key problems in defining interstitial transfer in sodium systems. and a facilities design concept was originated. philosophies were embodied in the work program which was submitted in November 1969.
An experimental approach was decided upon The program and design
A preliminary state-of-the-art review of carbon diffusion data has been documented and issued as an internal memo September 1969; this documentation will be issued as an appendix in the next quarterly report.
Experimental Plans
A detailed experimental program was written for the Carbon Equilibrium Loops (CELs), covering shakedown of the loops and metering systems: carbon meter calibration and measurement, and evaluation of carbon equilibrium concentrations (C,), and motivity or diffusion coefficient (M) values.
Facilities
The design of the CELs, including the control panels and tie in of all on-line instrumentation was completed, and a System Design Description (SDD) written. The S D D , together with the relevant detailed drawings, was submitted to the AEC, Coolant Chemistry Branch, for approval. Apart from minor modifications, the SDD was accepted.
Control of Hydrogen from the UNC Hydrogen Meter
A study of methods of hydrogen control was made. compared with cold trapping, and allowances were made for l o s s of hydrogen by permeation through the loop walls, cold trapping was. found to be much more efficient than cover gas stripping, and will be used as the main method of hydrogen control. However, it will be supplemented by cover gas stripping and a gas chromatograph will be installed for cover gas monitoring.
Cover gas stripping was
Even at low trapping efficiencies,
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Sodium Sampling and A n a l y s i s
During a v i s i t by ARD p e r s o n n e l t o ANL, an in t e r im p o l i c y on sodium sampling and a n a l y s i s w a s ag reed t o by ARD and ANL t o b e e f f e c t i v e u n t i l a n a t i o n a l p o l i c y i s e s t a b l i s h e d .
CURRENT PROGRESS
Procurement
A l l t h i n f o i l material f o r t h e expe r imen ta l program h a s now been r e c e i v e d . The i n v e n t o r y i n c l u d e s Type 316L s ta in less s teel , Type 304 L s t a i n l e s s s t e e l , Inco loy 800, 2-1/4 C r - 1 Mo s teel , and Armco I r o n . Chemical and m e t a l l u r g i c a l c h a r a c t e r i z a t i o n of t h e s e a l l o y s i s n e a r i n g comple t ion .
C o n s t r u c t i o n of t h e CEL c o n t r o l p a n e l , t h e l o o p , and i t s a u x i l i a r y equipment , i s completed excep t f o r w i r i n g hookup, l oop i n s u l a t i o n , and i n s t a l l a t i o n of carbon and oxygen meters. Three e l e c t r o l y t i c carbon meters ( f o r CEL-1, CEL-2, and ITF) have been r e c e i v e d from BNL a f t e r proof t e s t i n g i n s t a t i c sodium, and a modi f ied v e r s i o n of t h e oxygen meter i s a n t i c i p a t e d from Westinghouse Research L a b o r a t o r i e s i n t h e l a t t e r p a r t of J u l y .
The advanced s t r u c t u r a l s t a g e of t h e f a c i l i t y i s i l l u s t r a t e d i n F i g u r e s 1 through 4. F i g u r e 1 shows t h e c o n t r o l p a n e l f o r CEL-1 and CEL-2. The c o n t r o l and a n a l y z i n g c o n s o l e s f o r t h e UNC carbon meter can a l s o b e s e e n t o t h e r i g h t of t h e c o n t r o l pane l .
F i g u r e 2 shows a g e n e r a l view of t h e i n t e r n a l l a y o u t of t h e loop p r i o r t o i n s t a l l a t i o n of thermocouples and h e a t e r s .
F i g u r e 3 shows t h e vacuum d i s t i l l a t i o n column a t t a c h e d t o i t s own s i d e loop and s i t u a t e d on t o p of t h e main loop frame s o t h a t i t is r e a d i l y a c c e s s i b l e from a ca twalk . The long rod ex tend ing from t h e t o p of t h e u n i t a l l ows t h e sampling c r u c i b l e t o be lowered i n t o t h e sodium through t h e v a l v e and below t h e c o o l i n g c o i l , and then drawn back t o t h e c e n t e r of t h e g l a s s s e c t i o n f o r d i s t i l l a t i o n under vacuum. The c r u c i b l e and RF h e a t i n g c o i l are shown a t t h e base of t h e d i s t i l l a t i o n column.
F i g u r e 4 shows t h e l a r g e sample t a n k (sodium c a p a c i t y : 0.8 cu. f t . ) . The long r o d s ex tend ing from t h e t o p of t h e t ank are f o r r a i s i n g and lower ing t h e specimen r a c k s through t h e cover g a s i n t o t h e sodium pool .
On-Line Mete r ing
During t h i s p e r i o d a l l o u t s t a n d i n g b i d s and i n f o r m a t i o n f o r on - l ine sodium i m p u r i t y me te r ing equipment were r e c e i v e d , e n a b l i n g f i n a l c h o i c e s t o b e made. Devices t o b e i n c o r p o r a t e d are as f o l l o w s :
8
Figure 1. Control Panel For CEL-1 and CEL-2
3796 - 1
9
ru 0
C 0
.d
c, e,
3796-2
10
L
1
Figure 3. Vacuum Distillation Unit Attached to CEL-1
3796-3
11
Figure 4. CEL- 1 Sample Tank
3796 - 4
12
1. UNC d i f f u s i o n carbon meter
2. BNL e l e c t r o c h e m i c a l carbon meter
3. Westinghouse e l e c t r o c h e m i c a l oxygen meter
4 . F i s h e r Gas P a r t i t i o n e r (chromatograph) f o r cover gas hydrogen moni tor i n g
The p r e s e n t s t a t u s of v a r i o u s i t e m s i s as f o l l o w s :
1. Permiss ion f o r purchase of two UNC carbon meter s i d e loops was o b t a i n e d from AEC, NYOO, and t h e o r d e r was p laced immediately. The gas supp ly and a n a l y s i s conso le of t h e UNC carbon meter now a t ARD h a s f a c i l i t i e s f o r hand l ing one carbon meter probe. A l l materials and components necessa ry t o i n c r e a s e r eadou t c a p a b i l i t i e s by one o r two f u r t h e r probes were i d e n t i f i e d . p l aced because of d i v e r s i o n of funds i n t o work p l a n p r e p a r a t i o n .
Orders were n o t
2 . An o r d e r f o r t h r e e e l e c t r o c h e m i c a l carbon meters was p laced w i t h BNL. These are s t i l l l a b o r a t o r y p r o t o t y p e s , b u t r e p r e s e n t s t a t e - o f - the -a r t t echnology. Seve ra l improvements ove r e a r l y v e r s i o n s a re i n c o r p o r a t e d .
3. An o r d e r f o r two e l e c t r o c h e m i c a l oxygen meters w a s p l aced w i t h West inghouse, Nuclear I n s t r u m e n t a t i o n and C o n t r o l Dept.
4 . An o r d e r was p l aced and d e l i v e r y taken of a F i s h e r Gas P a r t i t i o n e r , Model 29. Th i s i s a s imple g a s chromatograph w i t h a the rma l c o n d u c t i v i t y d e t e c t o r . It w i l l be used t o moni tor t h e hydrogen c o n t e n t of t h e sample t ank cover gas .
Delivery was taken of d i f f e r e n t i a l voltmeters and r e c o r d e r s f o r readout and d i s p l a y of e l e c t r o c h e m i c a l meter o u t p u t s ; these w e r e i n c o r p o r a t e d i n t h e a p p r o p r i a t e c o n t r o l p a n e l s .
Sodium Sampling and Ana lys i s
A s p r e v i o u s l y ag reed w i t h ANL, d e t a i l e d p rocedures used by ARD f o r oxygen a n a l y s i s by amalga t ion and f o r by-pass sampling were submi t t ed f o r approva l ; t e n t a t i v e approval h a s been r e c e i v e d . Eva lua t ion of carbon i n sodium a n a l y s i s w a s completed and t h e procedure i s ready f o r s u b m i t t a l t o ANL f o r approva l . Eva lua t ion of n i t r o g e n i n sodium a n a l y s i s i s a l s o complete and t h e d e t a i l e d procedure i s b e i n g w r i t t e n .
13
SECTION 4
NCAA-300 SODIUM CORROSION OF WELDMENTS AND BRAZEMENTS
E. C. Bishop, S. L. Schrock, G. A. Whitlow, and W. L. Wilson
OBJECTIVES
The objective of this task is to provide quantitative sodium corrosion data from welded and brazed joints exposed under conditions simulating actual LMFBR sodium environment. The values of the variables of the temperature gradient (AT), temperature, oxygen content, and sodium flow rates will be selected so that they bear the maximum resemblance to actual service conditions; i.e., conditions under which material mass transfer would take place. damage effects will be studied under simulated service conditions.
In addition, the phenomenon of cavitation and cavitation
PRIOR WORK
The available data on sodium corrosion of weldments and brazements was reviewed in detail in the previous quarterly report, [l] program philosophy, experimental plans for this task, and the experimental facility to be used in this program (the Weldment and Brazement Test Loop, WBTL) were described. A system design description for this facility was submitted to the AEC Coolant Chemistry Branch for approval and comment. Progress on each of three loop runs in the WBTL is summarized in the following paragraphs.
In that report,
WBTL-1 - Simulated fuel pin grid type samples in the Inconel 718lNicrobraz 50 material combination were exposed to flowing, low oxygen sodium for 3500 hours at temperatures of 900 and 1200°F. The 1200°F samples lost weight as a result of exposure to sodium, while the 900°F samples gained weight. Weight change results were dependent on sodium velocity and position down- stream from the heater, and were due to removal and deposition of nickel and phosphorus in the case of the braze, and nickel and chromium from the Inconel 718. Further evaluation was delayed due to funding curtailment.
WBTL-2 - This run logged approximately 1250 hours under operating conditions, and was primarily concerned with the examinination of the behavior of spot- welded Type 316 stainless steel, grid-type samples in sodium. The behavior of welds in both annealed and cold-worked stainless steel is being examined and unwelded samples were included for comparison. In addition to these samples, a few brazed joints and simulated end-closure weld samples were included for testing. A limited number of end-closure welds contained a known defect and some of the brazed grid samples had received a past-brazing sensitization treatment prior to exposure to sodium. Since this work is in direct support of a grid design to be utilized in 37-pinY grid-type sub- assemblies to be irradiated in EBR-11, it is being charged to task OFBA-313 on contract AT(30-1)-4135 (Oxide Fuel Element Development). Control samples of the materials in this test were thermally aged in vacuum for comparison.
14
WBTL-3 - D i s c u s s i o n s were h e l d w i t h t h e s t a f f of t h e ARD Mechanical Development and Thermo F l u i d s Groups (LMFBR P r o j e c t ) r e g a r d i n g t h e d e s i g n requi rements f o r t h e n e x t r u n i n t h e Weldment and Brazement Loop (WBTL-3). Cons iderable i n t e r e s t w a s expressed i n c a v i t a t i o n and c a v i t a t i o n damage e f f e c t s , which may occur under a p p r o p r i a t e sodium c o n d i t i o n s i n t h e v i c i n i t y of t h e f u e l rod s u p p o r t g r i d s . C o n s i d e r a t i o n was b e i n g g i v e n t o a tes t s e c t i o n d e s i g n u s i n g a s i n g l e 37-pin, g r i d - t y p e c e l l , equipped w i t h a dummy f u e l p i n which would b e t e s t e d a t sodium v e l o c i t i e s of t h e o r d e r of 40 f p s . Other f a c t o r s such as g a s en t ra inment i n t h e sodium and i t s e f f e c t s on t h e o n s e t of c a v i t a t i o n were b e i n g c o n s i d e r e d . It seems l i k e l y t h a t t h e redes igned loop system WBTL-3 w i l l b e a h i g h v e l o c i t y system w i t h several s h o r t term r e p l a c e a b l e t es t s e c t i o n s ( o r " legs") and s e v e r a l long-term t e s t s e c t i o n s .
1
CURRENT PROGRESS
Work b e i n g charged t o t h i s t a s k i n c l u d e s e v a l u a t i o n of t h e brazed g r i d samples from WBTL-1 and d e s i g n of t h e samples and t es t s e c t i o n s f o r t h e n e x t r u n , WBTL-3, which w a s o r i g i n a l l y scheduled t o commence o p e r a t i o n e a r l y i n FY-1971.
WBTL-1 - Chemical a n a l y s i s of m i c r o d r i l l i n g s of t h e b r a z e material from b o t h sodium exposed and unexposed samples h a s been performed. The major i n d i c a t i o n confirms previous X-ray a n a l y s i s f i n d i n g s t h a t phosphorus i s v e r y much d e p l e t e d wi th a cor responding a p p a r e n t i n c r e a s e i n n i c k e l and chromium. F u r t h e r work on t h i s s u b j e c t h a s been de layed due t o h i g h e r p r i o r i t y p r o j e c t s .
WBTL-2 - The sodium c o r r o s i o n loop r u n WBTL-2 was t e r m i n a t e d d u r i n g t h i s p e r i o d a f t e r accumulat ing 2100 h o u r s of o p e r a t i o n . f o r two r e a s o n s : f i r s t , some of t h e loop components such as t h e pump and flowmeter were r e q u i r e d f o r WBTL-3; and second, r e d e s i g n of t h i s system w a s e s s e n t i a l t o reduce downtime. T h i s loop system h a s been d isassembled and t h e samples removed, c l e a n e d , and weighed.
T h i s d e c i s i o n w a s made
The thermal ag ing c a p s u l e s have logged 2200 h o u r s a t o p e r a t i n g tempera tures of 900 and 1200°F. S ince t h e c a p s u l e s a l s o c o n t a i n I n c o n e l 718 samples f o r compafison with WBTL-1 samples, they will be run f o r 3500 h o u r s , which was t h e l e n g t h of t h e WBTL-1 run .
WBTL-3 - It was dec ided t h a t c a v i t a t i o n and c a v i t a t i o n damage e f f e c t s , which may occur under a p p r o p r i a t e sodium c o n d i t i o n s i n t h e f u e l rod s u p p o r t g r i d s , w i l l b e t h e p r i n c i p a l s u b j e c t t o b e i n v e s t i g a t e d i n t h e n e x t r u n i n t h e Weldment and Brazement Loop (WBTL-3). A c o n c e p t u a l c a v i t a t i o n tes t c e l l , u t i l i z i n g two E B R - I 1 g r i d - t y p e ce l l s and a dummy 21-inch long f u e l p i n , h a s been des igned , and p r e l i m i n a r y drawings are i n p r o g r e s s . i s under c o n s i d e r a t i o n . The redes igned loop system w i l l b e a h i g h v e l o c i t y system i n c o r p o r a t i n g long term samples and t h e s h o r t term r e p l a c e a b l e c a v i t a t i o n tes t c e l l mentioned above.
The u s e of h i g h tempera ture a c c e l e r o m e t e r s t o d e t e c t c a v i t a t i o n
1 5
Work on t h i s t a s k h a s been t e m p o r a r i l y suspended due t o a n AEC d i r e c t i v e t o g i v e p r i o r i t y t o t h e p r e p a r a t i o n of Coolant Technology Work P l a n s . When work c e a s e d , p r e l i m i n a r y drawings of t h e c o n c e p t u a l c a v i t a t i o n tes t c e l l were near complet ion.
16
, .
, -
.I
SECTION 5
NCAA-400 MECHANICAL PROPERTIES OF STRUCTURAL M A T E R I A L S IN SODIUM
E. C . Bishop, J . C. Cwynar, P. N . F l a g e l l a , R. Hundal, and S . L. Schrock
OBJECTIVES
The o b j e c t i v e of t h i s t a s k i s t o o b t a i n e x p e r i m e n t a l mechanical p r o p e r t y d a t a f o r FFTF and LMFBR s t r u c t u r a l m a t e r i a l s exposed t o f lowing sodium, such t h a t meaningful c o r r o s i o n a l lowance l i m i t s may b e a p p l i e d by t h e d e s i g n e r s . E f f e c t s of sodium exposure a t t y p i c a l r e a c t o r c o n d i t i o n s on t h e mechanical p r o p e r t i e s of t h e materials w i l l b e e v a l u a t e d i n terms of pre-exposure t e m p e r a t u r e , t i m e , and d i f f e r e n t s u r f a c e t o volume r a t i o s f o r t h e materials. Long t e r m mechanical p r o p e r t y tests such as stress r e l a x a - t i o n , c r e e p - r u p t u r e , and s t r a i n - c y c l e f a t i g u e w i l l b e performed p r i m a r i l y i n f lowing sodium i n o r d e r t o r e t a i n t h e s u r f a c e c o n d i t i o n f o r t h e material developed d u r i n g pre-exposure. E v a l u a t i o n s from t h i s work are i n t e n d e d t o p r o v i d e b a s e l i n e i n f o r m a t i o n i n s u p p o r t of Task NCAA-600.
PRIOR WORK
ARD h a s i n i t i a t e d a n i n t e r n a l program t o p r o v i d e mainly s t r e s s - r e l a x a t i o n , c r e e p - r u p t u r e , and s t r a i n c y c l e f a t i g u e d a t a i n sodium on s e l e c t e d s t r u c t u r a l a l l o y s . These d a t a were t o b e used t o e v a l u a t e t h e e f f e c t s of a dynamic sodium sys tem, approaching t h o s e of t h e FFTF and LMFBR, on t h e mechanical p r o p e r t i e s of s t r u c t u r a l and c o r e materials. Some of t h e equipment des igned and b u i l t f o r t h i s program h a s reached t h e o p e r a t i o n a l s t a g e .
A sodium Pre-Exposure Loop (PEL-1) was des igned and f a b r i c a t e d e a r l y i n CY-1969. The f i r s t loop r u n was i n i t i a t e d i n May 1969, and 5000 h o u r s of pre-exposure was accumulated on t h e test specimens i n March 1970. The tes t samples c o n s i s t e d of s h e e t , b a r , and t u b i n g , pre-exposed a t 1200 and 1325°F w i t h a t u r b u l e n t sodium f l o w (Re~15,000). The sodium p u r i t y w a s main ta ined a t approximate ly 1 0 ppm oxygen by co ld t r a p p i n g .
The t e s t i n g f a c i l i t i e s MPS-1 and M P S - 2 were des igned and f a b r i c a t e d d u r i n g CY-1969, and were ready f o r shakedwon tests. They were des igned f o r stress r e l a x a t i o n and c r e e p - r u p t u r e t e s t i n g , ' r e s p e c t i v e l y , and t h e test specimens w i l l b e exposed t o a t u r b u l e n t sodium f l o w d u r i n g t e s t i n g . A t e s t i n g f a c i l i t y f o r s t r a i n c y c l e f a t i g u e (MPS-3) was des igned and f a b r i c a t e d , and assembly of t h e system w a s underway.
CURRENT PROGRESS
Material
The i n i t i a l material s e l e c t e d t o de te rmine t h e e f f e c t of a dynamic sodium environment on t h e mechanical p r o p e r t i e s f o r FFTF and LMFBR s t r u c t u r a l
3 @
'1 7
m a t e r i a l s was annea led Type 316 s t a i n l e s s s t ee l i n t u b e , s h e e t , and b a r forms. S e l e c t i o n was made e a r l y i n CY-1969, s o t h a t t es t samples were a v a i l a b l e f o r t h e Pre-Exposure Loop (PEL-1) s t a r t - u p i n May 1969. A t t h a t t i m e t h e r e f e r e n c e f u e l c l a d d i n g material f o r t h e LMFBR and FFTF w a s annealed Type 316 s t a i n l e s s steel. Test samples were a l s o f a b r i c a t e d from t h e same h e a t s f o r i n e r t gas a g i n g tests and unexposed long term mechanical p r o p e r t y tests, t o be r u n i n p a r a l l e l w i t h sodium exposed samples.
A f t e r c o n s u l t a t i o n s w i t h FFTF and LMFBR d e s i g n e r s , i t was dec ided t o i n c o r p o r a t e 20 percent cold-worked, Type 316 s t a i n l e s s s t ee l c l a d d i n g material i n t o t h e program. c l a d d i n g material w a s made a v a i l a b l e from t h e Cladding Development Program on Task SSBA 210 of C o n t r a c t AT(30-11-4135. and annea led 316 s t a i n l e s s s teel t u b i n g w i l l b e i n c l u d e d i n t h e n e x t PEL-1 and Aging-1 r u n s .
A l i m i t e d q u a n t i t y of h i g h l y c h a r a c t e r i z e d
Both 20 p e r c e n t cold-worked
Test P l a n s
The i n i t i a l samples planned f o r mechanical p r o p e r t y t e s t i n g i n sodium, as w e l l as t h o s e planned f o r t h e n e x t sodium pre-exposure run , and t h e i n e r t gas ag ing exposures were g i v e n i n Table 6-6 of Reference 1. f i r s t s t r e s s - r e l a x a t i o n and creep- rupture tests performed i n f lowing sodium w i l l i n v o l v e unexposed (as-received, annea led) samples a t 1200°F. These d a t a w i l l b e used as a b a s e r e f e r e n c e t o e v a l u a t e samples t e s t e d a f t e r pre-exposure t o sodium f o r 5000 h o u r s a t 1200°F and samples aged i n an i n e r t gas f o r 5000 h o u r s a t 1200°F.
A s n o t e d , t h e
Due t o t h e AEC d i r e c t i v e l a t e i n May t o p r e p a r e new work p l a n s f o r t h e sodium technology program, f u r t h e r work on tes t p l a n s w a s suspended.
Pre-ExDosure LOOD (PEL-1-11
Disassembly of t h e Pre-Exposure Loop (PEL-1-1) was completed a f t e r 5049 h o u r s of o p e r a t i o n a t nominal tes t s e c t i o n t e m p e r a t u r e s of 1200 and 1325°F ( a c t u a l t e m p e r a t u r e s were 1215 and 1315°F r e s p e c t i v e l y ) , a loop AT of 3000F maximum, and a sodium v e l o c i t y t o g i v e a Reynold’s Number o f , a p p r o x i m a t e l y 15,000 ( t u r b u l e n t f low) over t h e tes t specimens. The loop was c o n t i n u o u s l y cold- t rapped a t 300°F. R e s u l t s of sodium a n a l y s e s made d u r i n g t h e r u n are i n Table 1. Oxygen and carbon were main ta ined a t less t h a n 10 ppm and less t h a n 20 ppm r e s p e c t i v e l y . These are t h e r e f e r e n c e i m p u r i t y levels f o r t h e FFTF and LMFBR.
The mechanical p r o p e r t y test specimens (Type 316 s t a i n l e s s s t ee l , s o l u t i o n - a n n e a l e d , b a r , s h e e t , and t u b e ) have been removed from t h e test s e c t i o n s , c l e a n e d , and weighed. For a more complete d e s c r i p t i o n of he PEL-1-1 specimen i n v e n t o r y , r e f e r t o t h e p r e v i o u s q u a r t e r l y report!‘] of t h i s program. A l l specimens exper ienced weight l o s s e s and average c o r r o s i o n rates have been c a l c u l a t e d f o r t u b e and s h e e t specimens. These c o r r o s i o n ” rates have been p l o t t e d a g a i n s t t h e L/D r a t i o f o r each specimen (where L/D i s t h e l o c a t i o n of t h e specimens i n terms of t h e number of e q u i v a l e n t p i p e d i a m e t e r s downstream from t h e main h e a t e r ex i t ) and are p r e s e n t e d i n
18
i Q Date Loop 02 (a) C(b) N~(C) H(d) oH(e)
Hours (ppm) (ppd (ppd (ppd (ppd Comments
5/26/69
7/3/69
9/12/69
9/23/69
10 / 1/69
10/2/69
12/18/69
1/20/70
1/22/70
2/19/70
3/25/70
0
741
1454
1454
1494
1494
3200
3870
3870
4427
5049
8, 7, 11
3, 10, 11
5, 5 , 11
Il(t 1)
15(+ - 2)
5, 5, 5
11(+ - 3)
17(+ 4)
7.5(+ - 0.4) 11(+ 1)
8.3(+ 1.3)
4
4
3
-
3
8
11
- 38 31
16
6
0.9
0.1
-
-
1.2
1.1
-
-
0.6
0.3
0.2
2.1
0.3
-
-
0.5
1.0
- -
1.4
0.8
0.2
Start-up
Trace heater shorting to wall caused small leak. Repairs necessary.
(dl "Non-Hydroxide" Hydrogen by vacuum-ref lux technique at controlled amalgamation temperature in dry-box (e) "Hydroxide" Hydrogen t
F i g u r e 5. Several o b s e r v a t i o n s concerning t h e s e d a t a can b e made a t t h i s t i m e :
The l i n e s drawn through t h e d a t a p o i n t s are h a n d - f i t t e d .
1. The c o r r o s i o n ra te d e c r e a s e s e x p o n e n t i a l l y w i t h d i s t a n c e from t h e main h e a t e r ex i t . T h i s e f f e c t ("downstream" o r "L/D" e f f e c t ) i s due t o t h e s a t u r a t i o n of t h e sodium w i t h c o r r o s i o n p r o d u c t s a s i t f lows through t h e r e l a t i v e l y l o n g (52 i n c h e s ) i s o t h e r m a l tes t s e c t i o n s .
2. The c o r r o s i o n ra te a t 1315°F is approximate ly a f a c t o r of t h r e e g r e a t e r t h a n a t 1215°F.
19
1 .oo
0.80
0.60
0,40
: 0.10 e
z: 0.08 0
v) 0
," 0.06 0 0
0.04
0.02
0.01 0 io0 200 300 400 50 0 600 7 00
L/D FROM HEAT SOURCE
- ---- GE LOOP RUN 8-3 -- GE LOOP RUN 9-1 , -
\ - - -- GE LOOP RUN 8-1 --- GE LOOP RUN 8-2
-
'\ - "
'\ ' ' \
0 TUBE - 1315OF - 3595 h r - 2 . 6 f p s -
1454 h r - 3 . 8 f p s - v - I 3 l 5 O F - 3595 h r - 2 . 7 f p s
6 SHEET- 1 3 1 5 0 ~ - 1454 h r - 2 .0 fPs 3595 h r - 3 . 5 f p s
0 TUBE - 1215OF - 5049 h r - 4 . 5 f p s
A SHEET- 1215OF - 5049 h r - 2 . 0 f p s
I I I 1 I I
, Fugurc 5 . Corros ion Rate Data f o r Annealed Type 316 S t a i n l e s s Stcc.1 L ' D From Heat Source
3796 - 5 8 - 20
A
3. The d i f f e r e n c e i n t h e c o r r o s i o n ra te of tube v e r s u s s h e e t specimens a t t h e same tempera ture can p a r i t a l l y b e a t t r i b u t e d t o t h e f a c t t h a t t h e I D s u r f a c e area of t h e t u b e s , exposed t o e s s e n t i a l l y s t a g n a n t sodium, was n o t f a c t o r e d i n t o t h e c o r r o s i o n ra te c a l c u l a t i o n .
Ca c l a t e d c u r v e s f o r c o r r o s i o n rates v e r s u s LID u s i n g e q u a t i o n s d e r i v e d by
A sodium v e l o c i t y of 2.6 f p s was used i n t h e c a l c u l a t i o n s and r e s u l t s were c o r r e c t e d f o r an exposure tempera ture of 1315°F. of t h e GE l o o p s (%275"F) and t h e PEL-1 loop (%300"F) y i e l d e s s e n t i a l l y i d e n t i c a l oxygen s o l u b i l i t i e s i n sodium (both < 5 ppm). F i g u r e 5 t h a t w i t h t h e e x c e p t i o n of loop run 8-3, the calculated curves u s i n g t h e GE e q u a t i o n s and t h e ARD PEL-1 d a t a f o r t u b e samples a t 1315°F are i n g e n e r a l agreement.
GE b y from loop r u n s 8-1, 8-2, 8-3, and 9-1 are a l s o i n c l u d e d i n F i g u r e 5.
The c o l d t r a p tempera tures
It can b e seen i n
It i s impor tan t t o n o t e t h a t t h e mechanical p r o p e r t i e s of a n a u s t e n i t i c s t a i n l e s s s teel exposed t o a l i q u i d sodium environment ( h o t l e g ) are l i k e l y t o b e a f f e c t e d by t h r e e f a c t o r s :
1. L o s s of l o c a l c a r r y i n g c a p a b i l i t y due t o m a t e r i a l removal caused by g e n e r a l c o r r o s i o n
2. A l t e r a t i o n of mechanical p r o p e r t i e s due t o metal l ic element d e p l e t i o n and t h e subsequent format ion of a f e r r i t i c phase
3. A l t e r a t i o n of mechanical p r o p e r t i e s due t o i n t e r s t i t i a l e lement d e p l e t i o n
Item (1) above i s p r e d i c t a b l e and as such can b e accounted f o r i n des ign . Item (2) i s a s u r f a c e e f f e c t and as such is n o t expec ted t o s i g n i f i c a n t l y a l t e r most mechanical p r o p e r t i e s . Item (3) i s p r e s e n t l y u n p r e d i c t a b l e , o c c u r s t o s i g n i f i c a n t d e p t h s i n s t a i n l e s s steels, and i s probably t h e most i n f l u e n t i a l f a c t o r a f f e c t i n g t h e mechanical p r o p e r t i e s .
Although i t is s a t i s f y i n g t o be i n agreement w i t h o t h e r exper imenters on g e n e r a l c o r r o s i o n ra tes , a more i m p o r t a n t f a c t o r t o c o n s i d e r ,when mechanical p r o p e r t i e s are b e i n g s t u d i e d is t h e d e g r e e of i n t e r s t i t i a l d e p l e t i o n . I n a d d i t i o n t o t h e g e n e r a l c o r r o s i o n r a t e a n a l y s i s , a d e t a i l e d sample charac- t e r i z a t i o n program h a s been d e l i n e a t e d and i s p r e s e n t e d i n Table 2 . Because of t h e L/D e f f e c t , r e p r e s e n t a t i v e samples from each end of t h e t e s t s e c t i o n s are b e i n g c h a r a c t e r i z e d . Samples have been submi t ted f o r b u l k i n t e r s t i t i a l a n a l y s e s (carbon and n i t r o g e n ) , metal l ic g r a d i e n t a n a l y s i s ( F e , C r , Yo, Mn, d i ) , and meta l lography. The b u l k i n t e r s t i t i a l a n a l y s e s have been completed and r e s u l t s are i n Table 3.
Examination of t h e carbon r e s u l t s shows t h a t s h e e t samples have exper ienced e s s e n t i a l l y no change, while t u b e samples have been d e p l e t e d of carbon. Because of t h i s i n c o n s i s t e n c y , a r e p e a t a n a l y s i s was performed on a randomly s e l e c t e d t u b e and s h e e t specimen, R e s u l t s were i n g e n e r a l agreement w i t h i n i t i a l a n a l y s i s . This anomaly w i l l r e q u i r e f u r t h e r
21
investigation; however, it should be noted that the expected behavior of carbon mass transfer in all austenitic stainless steel system with a AT, is decarburization of hot leg specimens. a
Analytical Test
The nitrogen results appear more consistent in that both types of specimens and exhibited nitrogen depletion after pre-exposure to sodium. of depletion was markedly greater at 1315'F than 1215'F, as expected.
It can be concluded from these analyses that interstitial transfer has occurred to a significant degree due to the sodium exposure and that mechanical property testing in MPS units (MF'S-1,2, and 3) should proceed to determine the resultant effect on mechanical properties.
The degree
s amp le (a 9 b ) tube I sheet I bar Determination
Table 2. Chemical, Metallurgical, and Tensile Evaluations to be Performed for PEL-1-1 Test Samples After 5,049 hours at
1215'F and 1315°F in Flowing Sodium
Interstitial, Bulk X X
Glow Discharge Emission
Spectography (C)
Me t a 1 lo graph y X
X Cr, Ni, Fe, Mn, Mo, gradients
X X Carbide, Sigma, Grain size, hardness gradient
(a) One sample each for 1215°F and 1315°F (no bar
(b) One sample each from inlet and exit of flow leg (c) Sequential surface analysis
samples exposed at 1315°F)
Microprobe, Cr, Ni, Fe, Mn, Mo Continuous X X X gradients (relative)
Tensile, Uniaxial X X X UTS, YS, ductility
me t a 11 i c grad ie n t s Microprobe, spot X X X (quantitative)
Scanning Electron surface constituents Microprobe X X X (quantitative)
Interstitial, Layer X X X C, N, gradients
.
Q a Specimen
Type
a
Sample from Test Sect ion I n l e t Sample from Teat Sec t ion Ou t l e t Specimen Condition Carbon(c) Nitrogen(d) Carbon(c) Nitrogen(d)
( P P d ( P P d ( P P d ( P P d
Table 3 . Bulk I n t e r s t i t i a l A n a l y s i s of PEL-1-1 Specimens (Type 316 S ta in l e s s S t e e l )
Sheet As-received
Exposed t o 1215°F Na
Exposed t o 1325°F Na
Tubing(b) As-received
Exposed t o 1215°F Na
Exposed t o 1315'F Na
606-611(608)
643-644 (644)
673-685 (679)
556-559(558)
523-542 (532)
433-498 (466)
490
302-349 (326)
108-157(132)
548-563 (556)
446-458 (452)
103-108(106)
606-611 (608)
643-654(648)
664-665 (664) 663-676 (670)
556-559 (558)
504-519 (512)
368-382 (375) 410-429 (420)
490
281-321(301)
116-137(126)
548-563-(556)
506-509(508)
138-139 (138)
Vendor I Heat No. I L o t No. I Dimension
(a) Armco Stee l Corp. 380233 - 0.018 i n . t h i c k
(b) Superior Tube Co. 20303 316726 0.300 i n . OD x Io.012 i n . w a l l
~~
(c) T o t a l Combustion Method of Analysis
(d) K je ldah l Method of Analvsis
M e t a l l o g r a p h i c examinat ion has a l so been i n i t i a t e d and a l l specimens have p r o g r e s s e d through t h e f i n a l p o l i s h i n g s t a g e . specimens, pre-exposed t o 1215 and 1315'F sodium, have been s u b j e c t e d t o an e t c h i n g procedure r e p o r t e d l y [31 capable of d i s t i n g u i s h i n g between c a r b i d e s (M23Cg) and sigma phase.
Meta l lographic , mounts of t u b e
The e t c h i n g procedure i s o u t l i n e d below:
1.
2.
3 .
Remove any d i s t u r b e d metal by r e p e a t e d p o l i s h i n g and e t c h i n g i n a mild a c i d r e a g e n t ( V i l e l l a ' s reagent ) .
Etch i n h y d r o c h l o r i c - p i c r i c a c i d s i n a l c o h o l ( V i l e l l a ' s r e a g e n t ) t o o u t l i n e c a r b i d e s , f e r r i t e , and sigma phase.
Repol ish and e t c h i n f e r r i c y a n i d e (Murakami's Reagent) a t room tempera ture t o reveal c a r b i d e s o n l y , sigma p a r t i c l e s b e i n g f a i n t l y d i s c e r n i b l e only a f t e r l o n g e r e t c h i n g times.
A
23
4. Repol ish and e t c h e l e c t r o l y t i c a l l y i n 10 p e r c e n t chromic a c i d , u s i n g 3 v o l t s and 1 amp f o r 1 5 seconds o r more, which eats o u t sigma and c a r b i d e s and leaves f e r r i t e c l e a r l y o u t l i n e d .
. Photomicrographs, t aken a f t e r S t e p s ( 2 ) , ( 3 ) , and ( 4 ) i n t h e e t c h i n g procedure , are shown i n F i g u r e s 6 and 7 f o r t h e 1215 and 1315'F t u b e sampleis r e s p e c t i v e l y . By comparing Photomicrographs ( a ) and ( b ) , one can i d e n t i f y c a r b i d e s ; by comparing (a) and (c) one can identify fe r r i te ; and by e l i m i n a t i o n one can i d e n t i f y sigma.
I t h a s been t e n t a t i v e l y concluded t h a t a t 1215"F, c a r b i d e s (MZ3Cb) are p r e s e n t i n t h e g r a i n boundar ies t o w i t h i n approximately one m i l of t h e sodium exposed s u r f a c e . A d i s c o n t i n u o u s f e r r i t e phase, approximate ly one m i l t h i c k , e x i s t s on t h e s u r f a c e w i t h a h i g h o c c u r r e n c e of sigma phase w i t h i n i t . A s l i g h t amount of sigma phase i s a l s o p r e s e n t i n t h e g r a i n boundar ies .
A t 1315°F t h e r e are no c a r b i d e s o r f e r r i t e e v i d e n t i n t h e m i c r o s t r u c t u r e . There i s a much h i g h e r p e r c e n t a g e of massive sigma phase p r e s e n t i n t h e g r a i n b o u n d a r i e s . The g r a i n boundar ies a l s o appear t o b e d e p l e t e d of some c o n s t i t u e n t ( p o s s i b l y chromium) as evidenced by F i g u r e 7a.
It should be noted t h a t t h e foregoing c o n c l u s i o n s are o n l y t e n t a t i v e pending f u r t h e r m e t a l l o g r a p h i c examinat ion. It is a l s o i n t e n d e d t o v e r i f y t h e s e c o n c l u s i o n s by an X-ray technique developed by WRL, whereby i d e n t i f i - c a t i o n of secondary phases ( c a r b i d e s , sigma, c h i , and Laves) i n a u s t e n i t i c s t a i n l e s s s teels i s o b t a i n e d by comparing Mo/Cr and Fe/Cr r a t i o s .
Thermal Aging
I n o r d e r t o de te rmine t h e e f f e c t of sodium pre-exposure on t h e mechanical p r o p e r t i e s f o r t h e annea led 316 s t a i n l e s s s t ee l s h e e t , t u b e , and b a r samples r u n i n PEL-I a t 1200 and 1325°F f o r 5000 h o u r s , i d e n t i c a l samples have been prepared f o r thermal ag ing i n a rgon a t 1200 and 1325°F f o r 5000 h o u r s . The s t a i n l e s s s t ee l c a p s u l a t i n g t u b e s (1.0-inch d i a . x 24-inches l o n g ) , seven f o r each t e m p e r a t u r e , were f i r s t ou tgassed a t lOOO'F i n a vacuum of 1 x end p lugs i n p l a c e , u s i n g t h e same d r y box w i t h argon as t h e covergas. The c a p s u l e s were t h e n c l u s t e r e d i n t o bundles of seven each , ins t rumented f o r tempera ture measurement, and i n s e r t e d i n t o a s t a i n l e s s s teel conta in- ment t u b e (3.5-inch OD x 25-inches l o n g ) . samples was i n i t i a t e d a t t h e end of t h i s r e p o r t i n g p e r i o d .
t o r r , test samples i n s e r t e d , and t h e n s e a l e d by welding
Thermal ag ing of t h e encapsula ted
Mechanical P r o p e r t y Systems
The Stress R e l a x a t i o n Test System (MPS-1) and System (MPS-2) have been o p e r a t e d as complete problem areas r e l a t e d t o t h e sodium loop , t h e i n t e g r a t i o n of loop and tes t system have been p e r i o d .
t h e Creep Rupture Test u n i t s . Several of t h e mechanical tes t system, and r e s o l v e d i n t h i s r e p o r t i n g
.
24
Q i
( a ) E T C H E D , V I L E L L A
-.
( b ) E T C H E D , MURAKAM I
( c ) E T C H E D , E L E C T R O L Y T I C C H R O M I C AC I D
Figure 6. Photomicrographs of Annealed 316 Stainless Steel Tube Sample (aD surface)After 5049 Hours in Flowing Sodium at 1 2 1 5 9 ( 5oox )
’ @ 3796-6
25
( a ) E T C H E D , V I L E L L A
(b) E T C H E D , MURAKAMI
( c ) E T C H E D , E L E C T R O L Y T I C CHROM I C AC I D
Figure 7. Photomicrographs of Annealed 316 Stainless Steel Tube Sample (OD surface) After 5049 Hours in Flowing Sodium at 13159 ( S O O X )
37%-7
.
26
A r e d e s i g n of t h e covergas systems was performed t o p r e v e n t sodium vapor from condensing, and c logging t h e covergas l i n e s as e x p e r i e n c e d w i t h a s t a t i c covergas system. The sodium vapor i n t r o d u c e d problems i n t h e performance of mechanical p r o p e r t y tests and a l s o reduced t h e r e l i a b i l i t y
t o t h e tes t chsmber through t h e ex tensometer t u b e s and d i s c h a r g e d through a t e m p e r a t u r e - c o n t r o l l e d vapor t r a p . The vapor t r a p does n o t o p e r a t e a t 100 p e r c e n t e f f i c i e n c y , and a small amount of sodium d u s t p a r t i c l e s i s s t i l l p r e s e n t i n t h e covergas a f t e r p a s s i n g through t h e vapor t r a p . A 60 micron r e p l a c e a b l e f i l t e r h a s been i n s t a l l e d t o i n t e r c e p t t h e sodium d u s t b e f o r e
8 of t h e emergency dumping system. A slow covergas b l e e d i s b e i n g i n t r o d u c e d
(i t h e covergas f l o w - r e g u l a t o r valve i s al lowed t o c l o g .
Two problems were exper ienced w i t h t h e sodium cold- t rapping system which a f f e c t e d t h e s t a b i l i t y of f low i n t h e l o o p , and t h e accuracy of t h e sodium sampling procedure . The t u r b u l e n c e of t h e sodium i n t h e tes t chamber appeared t o create a f i n e foam which was p u l l e d through t h e loop system. T h i s f i n e foam accumulated i n areas of low f low v e l o c i t i e s , such a s t h e c o l d t r a p and t h e c o l d t r a p economizer. w a s g r a d u a l l y lowered t o a p o i n t where t h e cold t r a p p i n g e f f i c i e n c y w a s a f f e c t e d , and a l s o , release of l a r g e bubbles i n t o t h e sodium s t r e a m was o c c u r r i n g . When t h e l a r g e bubbles r e l e a s e d from t h e c o l d t r a p reached t h e pump, f low was normally d i s t u r b e d o r i n some cases s t o p p e d , and a l a r g e and i n t o l e r a b l e thermal i n s t a b i l i t y occurred i n t h e sodium system and i n t h e tes t sample. A r e d e s i g n of t h e c o l d t r a p loop t o reduce t h e problem of gas accumulat ion h a s been completed f o r MPS-1, -2 and - 3 .
The sodium level i n t h e c o l d t r a p
Concurrent w i t h t h e b a s e l i n e d a t a t es t r u n , t h e r e d e s i g n of t h e c o l d t r a p loop w a s e v a l u a t e d . The f low d i s t u r b a n c e observed w i t h t h e p r e v i o u s cold- t r a p l o o p d e s i g n h a s been reduced t o a l e v e l where i t does n o t a f f e c t t h e o p e r a t i o n of M P S - 2 ( c r e e p - r u p t u r e ) . For MFS-1 ( s t r e s s - r e l a x a t i o n ) which i s h i g h l y s e n s i t i v e t o changes i n t h e sodium f low and t e m p e r a t u r e , t h e r e d e s i g n h a s n o t reduced t h e problem s a t i s f a c t o r i l y and i n t e r m i t t a n t c o l d t r a p p i n g w i l l b e employed d u r i n g a mechanical p r o p e r t y test f o r t h i s loop .
Table 4 shows t h e sodium sampling a n a l y s i s d a t a o b t a i n e d from MPS-1 and - 2 , as well as t h e sampling c o n d i t i o n s . w i t h t h e c o l d t r a p d e s i g n used i n t h e MPS loops have been 5 t o 1 5 p e r c e n t . Assuming 5 p e r c e n t e f f i c i e n c y , t h e l e v e l of oxygen should b e reduced from 2100 ppm (only measurement a t loop s t a r t u p ) t o 1 0 ppm i n approximate ly t h i r t y h o u r s . I n c o n t r a s t , t h e a c t u a l v a l u e s ranged from 29 t o 50 ppm, a f t e r 90 t o 259 h o u r s of c o l d t r a p p i n g . I n i n t e r p r e t i n g t h e s e r e s u l t s , a l a y o u t of t h e c o l d t r a p p i n g and sampling s t a t i o n s was examined. The loop diagram ( F i g u r e 8) shows t h a t t h e sodium sample t u b e s were l o c a t e d a f t e r t h e economizer, and t h a t t h e sodium tempera ture a t t h i s p o i n t was approxi- mate ly 340'F. A t t h i s tempera ture t h e s o l u b i l i t y of oxygen i n sodium i s i n t h e o r d e r of 3 t o 5 ppm. A s l o n g as t h e b u l k sodium had a h i g h e r i m p u r i t y level t h a n t h e s o l u b i l i t y l i m i t f o r t h e tempera ture of t h e sample s e c t i o n , t h e i m p u r i t i e s d e p o s i t e d on t h e t u b i n g w a l l , and were i n c l u d e d i n t h e a n a l y s i s , i n a d d i t i o n t o t h e b u l k sodium i m p u r i t y level . Sample MPS-2-G a l s o s t r o n g l y i n d i c a t e s t h a t t h i s may b e t h e case; by f lowing through t h e t u b e s w i t h sodium a t 900°F, t h e i m p u r i t i e s were d i s s o l v e d and p u t i n t o t h e main loop a g a i n .
The observed c o l d t r a p p i n g e f f i c i e n c i e s
27
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' e T a b l e 4 . Sodium Analyses and Condi t ions f o r M P S Opera t ion(a)
SAMPLE I m s 2 c 1 M P S 2D I MPS2E I MPS2F I MPS2G 1 MPSID(bS
5/8/70 51 12 I70 5/15/70 5/20/70 5/20/70 6/24/70 Loop a t 1200°F 1-1 1 89 161 257 265 123 Cold Trapping T i m e (hr) 2 . 5 90 .5 162.5 258.5 258.5 123
Cold Trap Not Flowing Temp. (OF) 290 290 290 290 thru CT 420 Sample T i m e
I(.) Flow over test sample (creep-rupture) a t ~3 f p s .
(b) Sample MF'SlD with sample sec t ion ahead of the cold trap economizer ( l a t e s t design)
Based on t h i s a n a l y s i s , t h e sodium sample s e c t i o n was l o c a t e d i n f r o n t of t h e economizer on MPS-1, where t h e sodium tempera ture was 900 t o 1100"F, as shown i n F i g u r e 9. The sodium a n a l y s i s (MPS-1-D) showed, a f t e r a r e l a t ive s h o r t c o l d t r a p p i n g p e r i o d , a p u r i t y l e v e l below 10 ppm. I t is t h e r e f o r e assumed t h a t t h e sodium oxygen leve l h a s been less t h a n 10 ppm i n t h e p r e v i o u s t e s t s d e s p i t e t h e sodium a n a l y s i s i n d i c a t i n g t h e c o n t r a r y ; and t h a t t h e c u r r e n t b a s e l i n e d a t a t es t i s b e i n g conducted i n sodium of r e a c t o r p u r i t y . Both MPS-1 and MPS-3 loops have been modi f ied a s shown i n F i g u r e 9. M P S - 2 w i l l b e modi f ied a t t h e ear l ies t convenient t i m e . R e s u l t s of t h e stress r e l a x a t i o n tests i n MPS-1 have g i v e n q u i t e e r r a t i c r e l a x a t i o n c u r v e s . The c a u s e s of t h i s behavior w e r e thought t o b e f r i c t i o n i n t h e extensometer system and a l a c k of sodium tempera ture s t a b i l i t y a t t h e t e s t sample. l i n e v o l t a g e d u r i n g t h e day, and a l s o t h e e f f e c t of changes i n t h e ambient tempera ture on t h e thermal b a l a n c e of t h e loop . A c o n t r o l l e r , w i t h a u t o m a t i c reset c a p a b i l i t y w a s s u b s t i t u t e d f o r t h e p r e v i o u s l y used manual reset c o n t r o l l e r . i n c r e a s i n g t h e c l e a r a n c e between r o d s and t u b e s . sodium vapor condensed and f r o z e t h e ex tensometer movements w i l l b e avoided by keeping t h e system h e a t e d above t h e f r e e z i n g p o i n t f o r sodium, and t h e u s e of LVDT's c a p a b l e of o p e r a t i n g t o 500°F.
The tempera ture d e v i a t i o n s were a t t r i b u t e d mainly t o v a r i a t i o n s i n
The f r i c t i o n of t h e extensometer system h a s been reduced by The p r e v i o u s problem where
The S t r a i n Cycle F a t i g u e Test System (MPS-3) h a s been de layed due t o a n e c e s s a r y m o d i f i c a t i o n t o t h e ramp g e n e r a t o r module on t h e MTS f a t i g u e machine t o b e c a r r i e d o u t by MTS. The loop p a r t of t h e test system i s e s s e n t i a l l y f i n i s h e d , and w i l l b e s t a r t e d up s h o r t l y t o b e checked o u t independent ly . and i t w i l l b e connected t o t h e sodium loop i n t h e n e a r f u t u r e .
The f a b r i c a t i o n of t h e t es t chamber f o r MPS-3 i s complete ,
A
29
w 0
FLOW METER
<
T E S T HAMDER
PUMP
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ARGON COVER . . GAS I . t4A I N
I I I 1 I I
I HEATER
4’1 E C O N O M I Z E R
I COLD I TRAP
SAM a F i g u r e 9. Mps Sodium Loop with Modified No. 2 Cold Trap Sys tem
I R e s u l t s of t h e las t s t r e s s - r e l a x a t i o n r u n i n MF'S-1 are shown i n F i g u r e s 10
even though Run I1 was b e t t e r than Run I. The c a u s e s f o r t h e e r r a t i c and 11. F i g u r e 10 shows t h a t t h e two r e l a x a t i o n c u r v e s are q u i t e e r r a t i c ,
A s h o r t - t i m e c r e e p - r u p t u r e t es t of annea led 316 s t a i n l e s s s teel b a r (0.25-inch d i a . x 1.00-inch gage l e n g t h ) w a s performed a t 1200'F and 39,000 p s i t o de te rmine t h e o p e r a t i o n performance of t h e MPS-2 system. The r e s u l t s are p r e s e n t e d i n F i g u r e 12. No problems were encountered e x c e p t f o r a s m a l l d i sp lacement of t h e i n i t i a l s t r a i n v a l u e d u r i n g l o a d i n g . An e v a l u a t i o n i s b e i n g performed b u t t h e d isp lacement a p p e a r s t o b e r e l a t e d t o f r i c t i o n i n t h e extensometer r o d s and tubes .
C u r r e n t l y a long-term creep- rupture t es t i s b e i n g conducted i n MPS-2 w i t h a n unexposed, annealed 316 s ta in less s t e e l rod sample.
31
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00
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00
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37%- 10
32
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33
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70
60
50
40
30
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0.25-in. D I A x 1.0 in. L O N G GAUGE RUPTURE
0 I I I I I 1 I I I 16 20 24 28 32 36 40 0 u 8 12
T I ME ( m i n u t e s )
Figure 12. Creep-Rupture Curve for Annealed Type. 316 Stninlc .ss Stccl a t
3796 12 1200°F and 43.200 psi i n Flowing Soclium (Mps-2)
34
n SECTION 6
NCAA-600 SPECIAL COMPONENTS MECHANICAL PROPERTIES IN SODIUM
E. C . Bishop, J . C . Cwynar, and P . N . F l a g e l l a
OBJECTIVE
The o b j e c t i v e of t h i s t a s k is t o i s o l a t e and d e f i n e t h e e f f e c t of prolonged exposure t o dynamic sodium under mass t r a n s f e r c o n d i t i o n s on t h e mechanical b e h a v i o r of s p e c i a l component c o n f i g u r a t i o n s r e q u i r e d f o r f a b r i c a t i o n of t h e FFTF and LMFBR demonst ra t ion p l a n t .
PRIOR WORK
A g e n e r a l review of d e s i g n o r i e n t e d r e p o r t s f o r t h e FFTF and LMFBR systems was conducted i n an e f f o r t t o i d e n t i f y f r a c t i o n a l component c o n f i g u r a t i o n s r e q u i r i n g mechanical p r o p e r t y t e s t i n g i n dynamic sodium; i n a d d i t i o n , d i s - c u s s i o n s have been h e l d w i t h LMFBR and FFTF d e s i g n e n g i n e e r s , and stress a n a l y s i s conducted on a c o n t i n u i n g b a s i s w i t h t h e same o b j e c t i v e i n mind. Two f r a c t i o n a l components t e n t a t i v e l y i d e n t i f i e d f o r mock-up t e s t i n g i n sodium are:
1. Tube-to-tubesheet weldment (FFTF and LMFBR)
2. F u e l p i n s u p p o r t g r i d s t r u c t u r e (LMFBR)
CURRENT PROGRESS
Because of t h e urgency connected w i t h i n i t i a t i n g c h a r a c t e r i z a t i o n of PEL-1-1 samples i n s u p p o r t of t h e NCAA-400 t a s k , a major emphasis w a s p laced i n t h i s area i n p r e f e r e n c e t o t h e NCAA-600 t a s k e f f o r t d u r i n g t h e e a r l y p a r t of t h i s p e r i o d . The l a t t e r t h i r d of t h e p e r i o d w a s s p e n t i n p r e p a r i n g a Sodium Technology Program work p l a n p e r AEC d i r e c t i v e .
During t h i s r e p o r t i n g p e r i o d , a d i s c u s s i o n was h e l d w i t h LMEC t o a s c e r t a i n whether any of t h e i r work would a i d i n a c h i e v i n g t h e o b j e c t i v e of t h i s t a s k . Two c o n t r a c t s h e l d by LMEC were i d e n t i f i e d as p e r t i n e n t :
1. "Technica l L i a i s o n f o r Materials and P r o c e s s Development'' (189 No. 13291)
2. "Component Materials Management and Control" (189 No. 13293)
+ The o b j e c t i v e of I t e m (1) i s t o de te rmine t h e needs of component d e s i g n e r - f a b r i c a t o r s f o r d a t a on material p r o p e r t i e s , and t o guide e x p e r i m e n t a l programs toward s a t i s f y i n g t h o s e needs by m o n i t o r i n g t h e materials t e s t i n g
35
a c t i v i t i e s . i z e d materials f o r a l l tests made t o de te rmine p r o p e r t i e s of component material and f a b r i c a t e d e lements fo,r LMFBR service. a l s o a i d i n f u l f i l l i n g t h e o b j e c t i v e s of t h e NCAA-400 t a s k .
The o b j e c t i v e of Item ( 2 ) i s t o p r o v i d e specimens of c h a r a c t e r -
@ These c o n t r a c t s may 4
It w a s a l s o sugges ted t h a t ORNL b e c o n t a c t e d concern ing a c o n t r a c t t o s t u d y s t r u c t u r a l h i g h tempera ture d e s i g n methods f o r LMFBR c o r e s t r u c t u r e s t o de te rmine i f they have i d e n t i f i e d any s p e c i f i c d e s i g n c o n f i g u r a t i o n s i n need of t e s t i n g .
A series of meet ings was h e l d w i t h FFTF d e s i g n e n g i n e e r s encompassing t h e f o l l o w i n g component areas of t h e FFTF r e a c t o r :
1. Core Components
a . Driver F u e l Assembly
b. R a d i a l R E f l e c t o r Assembly
c . R a d i a l S h i e l d Assembly
d . C o n t r o l Rod Assembly
2 . Reac tor I n t e r n a l s
a. Core R e s t r a i n t Mechanism
b . Core Support S t r u c t u r e
C. Ins t rument Tree
3 . Coolant T r a n s p o r t System
a. Pump
b . Valves
4. Heat T r a n s f e r System
a . I n t e r m e d i a t e Heat Exchanger (IHX)
b. Dump Heat Exchanger (DHX)
5. I r r a d i a t i o n T e s t i n g System
a. Closed Loop Assembly
The purpose of t h e s e meet ings was twofold:
1. Gain f a m i l i a r i t y w i t h , and de termine t h e s t a t u s of t h e c u r r e n t component d e s i g n s .
Obta in t h e d e s i g n e n g i n e e r s o p i n i o n s concern ing areas of in-sodium e f f e c t s r e q u i r i n g e x p e r i m e n t a l i n v e s t i g a t i o n s t o g u a r a n t e e a r e l i a b l e component d e s i g n .
2.
36
h I n t h e case of components l i s t e d under Items ( l ) , (2) , and (5) above, t h e I meet ings were q u i t e s u c c e s s f u l i n that p r e l i m i n a r y d e s i g n drawings and the
reviewed i n o r d e r t o i d e n t i f y p o t e n t i a l problem areas a s s o c i a t e d w i t h a expec ted envi ronmenta l c o n d i t i o n s were o b t a i n e d .
sodium exposure. Once p o t e n t i a l problem areas have been i d e n t i f i e d , review meet ings w i l l a g a i n b e h e l d w i t h t h e cognizant d e s i g n e n g i n e e r t o o b t a i n comments. I n t h e case of components under Items ( 3 ) and ( 4 ) , d e s i g n e r - f a b r i c a t o r s w i l l b e s e l e c t e d s h o r t l y by RDT. A t t h a t t i m e a more complete
These drawings a r e be ing C t
I .
,. n
37
SECTION 7 SUMMARY OF WORK PLAN PREPARATION
W . E , Ray
The p o r t i o n of t h i s r e p o r t i n g p e r i o d a f t e r May 25 was devote, t o p r e p a r a t i o n of a Westinghouse s t a t e m e n t of t h e r e q u i r e d n a t i o n a l program on LMFBR c o o l a n t technology i n s i x s p e c i f i e d areas:
1. Out-of-Pile 304/316 T e s t i n g
2 . Advanced F u e l Cladding
3 . S t e a m Genera tor Materials
4 . Wear and Eros ion of Materials i n Sodium
5. F r a c t i o n a l Components T e s t i n g
6. R a d i o a c t i v e Repai r Engineer ing
A l l were prepared i n accordance w i t h a Coolant Chemistry Branch format f o r work p l a n p r e p a r a t i o n and, p e r d i r e c t i v e , t o a n annual e x p e n d i t u r e level n o t i n e x c e s s of $5,000,000.
S u b m i t t a l of t h e work p l a n s w a s made t o t h e Coolant Chemistry Branch on J u l y 15. Four volumes were i n v o l v e d , t h e t i t l e s of which were as fo l lows:
Volume 1: SODIUM TECHNOLOGY PROGRAM WORK PLAN - SUMMARY
Volume 2: SODIUM TECHNOLOGY PROGRAM WORK PLAN - PROJECT PLANS
Volume 3 : SODIUM TECHNOLOGY PROGRAM WORK PLAN - APPENDIX A - SUPPORTING DATA
Volume 4: SODIUM TECHNOLOGY PROGRAM WORK PLAN - APPENDIX B - PROPRIETARY SUPPORTING DATA
U n f o r t u n a t e l y , i t was n o t p o s s i b l e t o meet t h e c b j e c t i v e s i d e n t i f i e d by t h e Coolant Chemistry Branch S t e e r i n g Committee d u r i n g i t s meet ing i n San F r a n c i s c o i n A p r i l 1970.
I n many i n s t a n c e s , s c h e d u l e a n d / o r c o s t r e s t r a i n t s n e c e s s i t a t e d a b b r e v i a t e d coverage of a s u b j e c t area o r a change i n t e c h n i c a l d i r e c t i o n from t h a t which was o r i g i n a l l y recommended. To i l l u s t r a t e , a s u r v e i l l a n c e program w a s i d e n t i f i e d i n t h e 304/316 t e s t i n g program which ex tends beyond t h e s p e c i f i e d p r o j e c t end d a t e of F i s c a l Year 1972; and i t was recommended t h a t " a l t e r n a t e " r a t h e r t h a n "advanced'' f u e l c l a d d i n g b e i n v e s t i g a t e d under P r o j e c t 2 .
38
SECTION 8 L I S T OF REFERENCES
1. "Sodium Technology Program Quarterly Progress Report for the Period Ending March 3 1 , 1970," WARD-4173-1, (May 1970).
2. "Sodium Components Development Program: Mass Transfer Investigations in Liquid Metal Systems," Quarterly Progress Report No. 6, June- August, GEAP-5693, (1968).
3. E. J. Dublis and G. V. Smith, "Identification and Mode of Formation and Resolution of Sigma Phase in Austnitic Chromium-Nickel Steels ," ASTM Special Technical Publication No. 110, (June 1950).
39
DISTRIBUTION LIST FOR REPORTS TO BE DISTRIBUTED BY DTIE FOR CONTRACT AT(30-1)-4173
!
c
Y
A s s i s t a n t D i r e c t o r , RDT, P a c i f i c Northwest Programs U.S. Atomic Energy Commission P o s t O f f i c e Box 550 Richland , Washington 99352
A s s i s t a n t D i r e c t o r f o r Reac tor Technology D i v i s i o n of Reac tor L i c e n s i n g U.S. Atomic Energy Commission
Washington, D. C. 20545
(2)
(BETH-010)
D i r e c t o r (2) D i v i s i o n of Reac tor S t a n d a r d s U.S. Atomic Energy Commission
Washington, D. C. 20545 (BETH- 0 10)
U. S. Atomic Energy Commission Washington, D. C. 20545 A t t e n t i o n : L i b r a r y (2)
RDT S i t e O f f i c e U. S . Atomic Energy Commission Idaho O p e r a t i o n s O f f i c e P o s t O f f i c e Box 2108 Idaho F a l l s , Idaho 83401
RDT S i t e O f f i c e U.S. Atomic Energy Commission Argonne N a t i o n a l Labora tory 9800 South Cass Avenue Argonne, I l l i n o i s 60439
RDT S i t e O f f i c e U.S. Atomic Energy Commission P o s t O f f i c e Box 1446 Canoga Park , C a l i f o r n i a 91304
RDT S i t e O f f i c e U.S. Atomic Energy Commission 310 DeGuigne Driv.e Sunnyvale, C a l i f o r n i a 94086
RDT S i t e O f f i c e U.S. Atomic Energy Commission P o s t O f f i c e Box X Oak Ridge, Tennessee 37830
RDT S i t e O f f i c e U.S. Atomic Energy Commission P o s t O f f i c e Box 154 Madison, Pennsylvania 15663
RDT S i t e O f f i c e U.S. Atomic Energy Commission P o s t O f f i c e Box 2325 San Diego, C a l i f o r n i a 92112
D i r e c t o r (1) P r o j e c t Manager, FFTF ( 5 ) P a c i f i c Northwest Labora tory B a t t e l l e Memorial I n s t i t u t e P o s t O f f i c e Box 999 Richland , Washington 99352
D i r e c t o r (4) LMFBR Program O f f i c e Argonne N a t i o n a l Labora tory 9700 South Cass Avenue Argonne, I l l i n o i s 60439
A s s o c i a t e D i r e c t o r (5) Engineer ing Research &
Argonne N a t i o n a l Labora tory 9700 South Cass Avenue Argonne, I l l i n o i s 60439
Development
D i r e c t o r , K. D i v i s i o n ( 2 ) Los Alamos S c i e n t i f i c Labora tory P o s t O f f i c e Box 1663 Los Alamos, New Mexico 87544
A s s i s t a n t D i r e c t o r (RDT) (2) Oak Ridge N a t i o n a l Labora tory Union Carbide Corpora t ion AEC Opera t ions P o s t O f f i c e Box X Oak Ridge, Tennessee 37831
D i r e c t o r (5) Liquid Metal Engineer ing Center P o s t O f f i c e Box 1449 Canoga Park , C a l i f o r n i a 91304
Manager Idaho Nuclear Corpora t ion P o s t O f f i c e Box 1845 Idaho F a l l s , Idaho 83401
S u p e r i n t e n d e n t Meta l lurgy D i v i s i o n U.S. Naval Research Labora tory Washington, D. C. 20390
Research D i r e c t o r Albany Meta l lurgy Research Center Bureau of Mines U. S. Department of t h e I n t e r i o r P o s t O f f i c e Box 70 Albany, Oregon 97321
Head Meta l lurgy and Materials Sc ience
Department of Applied Sc ience Brookhaven N a t i o n a l Labora tory Upton, New York 11973
D i v i s i o n
O f f i c e of Vice P r e s i d e n t Atomic Power Development ASSOC., I n c . 1911 F i r s t S t r e e t D e t r o i t , Michigan 48226
Westinghouse Elec t r ic Corpora t ion Tampa, F l o r i d a 33616
F o s t e r Wheeler C o r p o r a t i o n 100 South Orange Avenue L i v i n g s t o n , New J e r s e y 07039
Mine S a f e t y Corpora t ion D i v i s i o n of Mine S a f e t y Appliances
Evans C i t y , Pennsylvania 16033 Company
Byron Jackson Corpora t ion P o s t O f f i c e Box 2017 Terminal Annex Los Angeles , C a l i f o r n i a
Atomics I n t e r n a t i o n a l A D i v i s i o n of North American
O f f i c e of t h e P r e s i d e n t P o s t O f f i c e Box 309 Canoga P a r k , C a l i f o r n i a 91304
A v i a t i o n , I n c .
Chief P r o j e c t Manager F a s t Reac tor Components Power
Genera t ion D i v i s i o n The Babcock and Wilcox Company Barber ton , Ohio 44203
The Babcock and Wilcox Company Power Genera t ion D i v i s i o n P o s t O f f i c e Box 1260 Lynchburg, V i r g i n i a 24505 A t t e n t i o n : L i b r a r i a n
(:!)
A s s o c i a t e Manager Materials Engineer ing Department Battelle Memorial I n s t i t u t e Columbus Labora tory . 505 King Avenue Columbus, Ohio 43201
Combustion Engineer ing , I n c . (2) O f f i c e of t h e Vice P r e s i d e n t Nuclear D i v i s i o n P o s t O f f i c e Box 500 Windsor, Connect icu t 06095
Manager, Advanced Reac tors
Westinghouse E l e c t r i c . , C o r p o r a t i o n Power Systems P o s t O f f i c e Box 158 Madison, Pennsylvania 15663
D i v i s i o n (3)
Gulf-General Atomic, I n c . O f f i c e of t h e P r e s i d e n t Engineer ing D i v i s i o n P o s t O f f i c e Box 608 __ San Diego, C a l i f o r n i a 92112
Genera l Manager (3) Breeder Reac tor Development Opera t ion General E lec t r ic Company 310 DeGuigne Drive Sunnyvale, C a l i f o r n i a 94086
Chairman Department of Nuclear Engineer ing Massachuse t t s I n s t i t u t e of Technology 77 Massachuse t t s Avenue Cambridge, Massachuse t t s 02139
Y
c Nuclear Materials and Equipment Corp. Office of the President Apollo, Pennsylvania 15613
Manager, Research United Nuclear Corporation Grasslands Road Elmsford, New York 10523
Distribution to UKAEA under UKAEA/USAEC Fast Reactor Exchange
i
Development Contracts Division (2) U.S. Atomic Energy Commission New York Operations Office 376 Hudson Street New York, New York 10014
