Date post: | 18-May-2018 |
Category: |
Documents |
Upload: | trinhhuong |
View: | 224 times |
Download: | 1 times |
UNCLASSIFIED
UNCLASSIFIED
Materials HandbookMaterials Handbook
• Started for the APT project• Continued in AAA• Now accepted as the GenIV handbook
Stuart Maloy (LANL)Phil Rittenhouse (ORNL, ret)
UNCLASSIFIED
UNCLASSIFIED
Rev. 4 of the Materials Handbook will be ready for distributionin October 2003
Rev. 4 of the Materials Handbook will be ready for distributionin October 2003
Table of ContentsVolume 1
1. Introduction 2. Inconel 718 3. 316L SS 4. 6061-T6 Al 5. 316L/6061 Joint 6. Lead 7. Tungsten 8. Niobium 9. Titanium 10. Graphite 11. Alumina 12. (Placeholder) Fiber-Optic Materials 13. (Placeholder) Accelerator Component Materials 14. Tritium System Materials 15. Coolants/Fluids 16. 304L SS 17. (Placeholder) 1040 Carbon Steel 18. (Placeholder) 430 Ferritic Steel
19. NEW in Rev. 3 Design Properties of Mod 9Cr-1Mo (T91)
20. (New in Rev. 4) Design Properties of HT-9 and Russian Ferritic-Martensitic Steels
21. (New in Rev. 4) Design Properties of Tantalum
22. NEW in Rev. 3 Design Properties of Lead-Bismuth Eutectic
UNCLASSIFIED
UNCLASSIFIED
Recent Handbook ActivitiesRecent Handbook Activities
Review and final revisions to Chapter 21 on Tantalum were Completed• Original draft of the chapter was prepared
by Hans Ullmaier of the ESS Project at Forschungszentrum Juelich
Handbook Chapter 18 on HT9 ferritic/martensitic stainless steel was drafted and reviewed• First complete draft prepared by the
Handbook Coordinator
• Based on a first partial draft prepared by Todd Allen on ANL
• Chapter includes selected information on Russian ferritic/martensitic steels of similar composition to HT9.
• Russian steels have higher Si content to provide increased resistance to attack in Pb-Bi eutectic.
Both chapters will be ready forinclusion in Revision 4 on the Materials Handbook in the Fall
UNCLASSIFIED
UNCLASSIFIED
MCNPX DevelopmentsMCNPX Developments
Laurie Waters
High Power Targetry for Future Accelerators
September 11, 2003
UNCLASSIFIED
UNCLASSIFIED
MCNPX 2.5.d released August, 2003MCNPX 2.5.d released August, 2003
John S. Hendricks, Gregg W. McKinney, Laurie S. Waters, TeresaL. Roberts, Harry W. Egdorf, Holly R. Trellue, Joshua P. Finch,
Nate Carstens, LANLFranz X. Gallmeier, ORNL
Jean-Christophe David - CEA-SaclayWilliam B. Hamilton, HQC Professional Services
Julian Lebenhaft, Paul Scherrer Institute
SponsorsEric J. Pitcher, Doublas R. Mayo, Martyn T. Swinhoe,
Stephen J. Tobin, Thomas Prettyman- LANL
UNCLASSIFIED
UNCLASSIFIED
MCNPX Code AcceptancePhotons Electrons Neutrons Protons Photonuclear Other single Light Ions Heavy Ions
µ Π Κ ν, etc d t s a
1 TeV Quantum Models
1 GeV ModelsINC, Pre-equilibrium, Evaporation modelsTables or Models
1 MeV
TablesIn progress
1 keV
1 eV
Thermal
Mixing
UNCLASSIFIED
UNCLASSIFIED
MCNPX Events During Past YearMCNPX Events During Past Year
• Version 2.5.b released Nov 26, 2002• Version 2.5.c released Apr 3, 2003• Version 2.5.d released Aug, 2003• 1113 beta testers, 250 institutions (28 users in progress)• 5-day Classes
– SCK-CEN, 20 students– Orlando, 15 students– Santa Fe Community College, 23 students– MD Anderson Cancer Center, 24 students– Santa Fe Community College, 16 students
• 2 summer students, – Nate Carstens- MIT (speedup of parallel KCODE Calcs.)– Josh Finch- Purdue (new test problems)
UNCLASSIFIED
UNCLASSIFIED
FundingFunding
• AFCI• Mars Odyssey
– Water on Mars, July 2002 issue of Science, Distinguished Performance Award just announced
• Threat Reduction– Groundwork CINDER implementation work for delayed
neutrons in active interrogation– Maritime cargo container project– Nonproliferation/Safeguards - various projects
• Heavy Ions– Rare Isotope Accelerator, NASA, AFCI fuels
• Isotope Production Facility
UNCLASSIFIED
UNCLASSIFIED
Code Applications as of 8/25/03Code Applications as of 8/25/03
• Medical 70 groups 201 people• Space reactors, cosmics 54 groups 115 people• Fuel Cycles 50 groups 140 people• Threat Reduction 47 groups 124 people• ADS 45 groups 185 people• Accelerator HP 33 groups 101 people• Applied Physics* 31 groups 83 people• Neutron scattering 16 groups 81 people• Code development 18 groups 28 people• Physics models, data eval. 9 groups 18 people• Nuclear, HE, Astrophysics 8 groups 56 people
* Radiography, oil well logging, irradiation facilities, isotope production, detector development, environmental, high density energy storage
UNCLASSIFIED
UNCLASSIFIED
MCNP4C3 FeaturesMCNP4C3 Features
• Macrobody geometry• Superimposed mesh weight windows• Interactive geometry plotting• Perturbations• Unresolved resonances• Photonuclear reactions• Delayed neutrons• ENDF/B-VI physics• PC enhancements• ITS3.0 electrons• Parallelization
UNCLASSIFIED
UNCLASSIFIED
MCNPX 2.4.0 RSICC Release - Sept 2002MCNPX 2.4.0 RSICC Release - Sept 2002
• F90 modularity and dynamic memory allocation (GWM)• Distributed memory mulitprocessing for all energies (GWM)• Repeated structures source path improvement (LLC/JSH)• Default dose functions (LSW/JSH)• Light ion recoil (JSH)• Enhanced color geometry plots (GWM/JSH)• Photonuclear and proton cross section plots (JSH)• Photonuclear and proton reaction multipliers with FM cards (JSH)• Logarithmic interpolation on input cards (10log) (JSH)• Specify cosine bins in degrees (JSH)• Cosine bin specification for F2 flux tallies (JSH)• Pause command for tally and cross-section plots (JSH)
UNCLASSIFIED
UNCLASSIFIED
MCNPX 2.5.b FeaturesMCNPX 2.5.b Features
• CEM2k physics models (SGM, AJS, FXG,JSH)• Mix and Match solution (JSH)
– Isotope Mixing for different particles– Energy Matching between libraries and models
• Positrons enabled as source particle on SDEF card (HGH)• Spontaneous fission (par=sf on SDEF card) (JSH)
UNCLASSIFIED
UNCLASSIFIED
MCNPX 2.5.c FeaturesMCNPX 2.5.c Features
• MPI Multiprocessing (JL/GWM)• i,j,k lattice indexing in geometry plots (JSH)• Enable weight window generator in physics model region
(FXG,JSH)• Enable exponential transform in physics model region (FXG,JSH)• Extend neutron model physics below 20 MeV (JSH)• 3-He coincidence detector modeling (HGH/JSH)• F90 Autoconfiguration (TLR)
UNCLASSIFIED
UNCLASSIFIED
MCNPX 2.5.d FeaturesMCNPX 2.5.d Features
• INCL/ALBA physics models (JCD/JSH)• Lattice tally speedup for rectangular meshes (GWM)• Multiple particles on SDEF cards (JSH)
– Can depend on other variables– Normalization
• Auxiliary input files, ‘READ’ card (JSH)• Geometry plot of weight-window-generator superimposed mesh (JSH)• Pulse-height light tally with anticoincidence, FT8 PHL (GWM)• Coincidence capture tally and PTRAC file, FT8 CAP
(MTS/SJT/DRM/JSH)• Residual Nuclei Tally, FT8 RES (JSH)• Inline generation of double differential cross sections and residuals
(JSH)
UNCLASSIFIED
UNCLASSIFIED
Future WorkFuture Work• User support and testing• Error Analysis
– Completion of perturbation techniques in model region– Data covariance analysis
• Criticality– Externally driven source– Improve stability of eigenfunctions– Improve parallel processing for KCODE calculations
• Transmutation– Inlining of CINDER’90 for transmutation work– Monteburns and Cinder are about to go up on the beta test page
• Variance Reduction– Variance reduction for pulse-height tallies– Detectors and DXTRAN for all neutral particles at all energy ranges– Secondary particle angle biasing for isotropic distributions– Next-event-estimators for charged particles
UNCLASSIFIED
UNCLASSIFIED
Future WorkFuture Work• Physics improvements
– Heavy ion and low energy transport improvements for fuels work– Upgrade physics models as they become available, e.g., LAQGSM/CEM,
ISABEL• Miscellaneous code features
– Plotting of physics model total and absorption cross sections– Lattice tally contour plotting– Interactive tally and cross section plotting– CAD link– Integration of HTAPE tallies directly into MCNPX– Parabolic beam source– Addition of MCNP5 features
• Software Engineering– INTEL and 64 bit computer support– Improvements in autoconfiguration system
• RSICC Release in December 2003
UNCLASSIFIED
UNCLASSIFIED
TRACE Code Development and ApplicationsTRACE Code Development and Applications
High Power Targetry for Future AcceleratorsSeptember 11, 2003
ByJ. Elson and J. Lin
Nuclear Design and Risk Analysis Group (D-5)
UNCLASSIFIED
UNCLASSIFIED
OutlineOutline
• TRACE Overview– Roles– Sponsors– History– TRACE Modernization– Code Characteristics and Capabilities– Code Qualification and Software Validation
• TRACE Applications for Accelerator Systems– DELTA-Loop Performance Benchmarks– LANSCE-1L Test Facility Safety Studies
UNCLASSIFIED
UNCLASSIFIED
D-5 RolesD-5 Roles
• Transient Reactor Analysis Computational Engine (TRACE) software development
• Software validation• Software applications• Consulting and training services
UNCLASSIFIED
UNCLASSIFIED
SponsorsSponsors
• US Nuclear Regulatory Commission (NRC)– Office of Nuclear Reactor Research (RES) -
Primary Sponsor• Division of Systems Research; Reactor and Plant Systems Branch
– Office of Nuclear Reactor Regulation (NRR) -Secondary Sponsor
• Knolls Atomic Power Laboratory (KAPL)
UNCLASSIFIED
UNCLASSIFIED
HistoryHistory
• TRACE under continuous development for the U. S. Nuclear Regulatory Commission (NRC) since early 1970
• TRACE continues to evolve with increasing understanding of complex two-phase, multi-component fluid phenomenology
• NRC sponsored multiple codes for 20 years• NRC has now selected TRACE as the sole platform
for future development• Ambitious multi-institution development program
underway
UNCLASSIFIED
UNCLASSIFIED
TRACE Development EnvironmentTRACE Development Environment
NOW(1997 to Present)
THEN(1970’s to 1997)
ISL
PurdueUniv
PennState
LANL
NRCIntegration
LANLDevelopment
and Integration
UNCLASSIFIED
UNCLASSIFIED
TRACE Modernization EffortTRACE Modernization Effort
• Modernized a legacy code...– Updated non-ANSI-standard code to Fortran 95– Added new component models
• Added BWR component models to what was previously a PWR code
• Added RELAP5 components (e.g., single-junction component)
– Enhanced numerical solution algorithms– Added multi-dimensional kinetics (PARCS code)– Added new material properties (Na, He, Pb-Bi, other)– Updated the Validation Test Matrix
UNCLASSIFIED
UNCLASSIFIED
TRACE Modernization EffortTRACE Modernization Effort
• Modernized code is highly modular and object-oriented
– Order of magnitude easier to maintain and modify• Liquid metal fluid properties added to TRAC-M and tested
within 2 staff-weeks• Prior versions of code may have required several staff-
months for the same task– Enhanced parallelization
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• Modular, object-oriented F95 standard coding• Generalized two-phase thermal-hydraulic
modeling capability (plants & test facilities)– Two-fluid model - 6 equation model– Multi-dimensional VESSEL component– All other components modeled in one dimension
• Pumps, pipes, valves, etc.– Primary, secondary, and containment may be simulated
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• Multiple fluid modeling capability– Primary and secondary loops can be modeled with
different working fluids– Available fluid models include H2O, D2O, He, Pb-Bi, Na,
N2, air, oil, and RELAP5 H2O• Non-condensable gas model (H2, air, etc.)• Trace species tracking capability
– Track trace gas and/or liquid species– Includes solubility models for trace species
• Fluid volumetric heating and fluid decay heat models
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• Single-phase and multi-phase heat transfer models
– Includes liquid metal heat transfer models• Multi-dimensional heat structure models
– Cylindrical, rectangular, and spherical heat structures– Multiple materials
• Generalized radiation heat transfer modeling
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• PWR and BWR capability within the same code version
• Enhanced BWR fuel assembly models– Partial length fuel rods– Water rods and channels with diameters and geometry
different from fuel rods• Point and multi-dimensional kinetics
– PARCS code allows for multi-dimensional, transient coupling
– Point kinetics model also available
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• Multiple processor capability• External component model
– Allows different parts of a model to run on different processors
– Can be used to couple TRACE to other computer codes or models (e.g. CFD, etc.)
• TRACE coupled to HMS CFD code with one staff-week effort (high-level waste tanks)
UNCLASSIFIED
UNCLASSIFIED
TRACE Characteristics and CapabilitiesTRACE Characteristics and Capabilities
• Runs on a variety of platforms• Platform-independent graphics and restart files• Input can be generated by GUI front-end (SNAP)
– SNAP takes basic plant geometric and materials data and generates input files for TRACE
– SNAP can read RELAP5 input decks and generate TRACE input models
UNCLASSIFIED
UNCLASSIFIED
Code Qualification and Software Validation
Code Qualification and Software Validation
• TRACE code has been validated to ensure that all code features, models, and integrated calculation capabilities are tested
• Large data base of assessments against LWR actual plant data and experiments
– Separate effects tests, component effects tests, integral effects tests, and other standard tests
• TRACE Validation Test Matrix includes ~1000 test problems
• TRACE adheres to NRC Software Quality Assurance requirements
UNCLASSIFIED
UNCLASSIFIED
Code Qualification OverviewCode Qualification OverviewQu a lified TRA C
Cod e
Re qu ire men ts D efin it ion , Design , a n d I mp lemen tation1. Field E qua tion s 2. C losu re Relat ion s 3. C omp onen t m od els 4. Sp ecia l Mod els 5. N u me rics
Ve rifica t ion
Valid ation usin g
Se para te E ffects Te sts
Va lid at ion usin g
I n teg ral E ffect Te sts
Docu men tatio nDe scrip t ion
Requ irem en t s Do cu m en ts Ve rifica t ion an d Va lid at ion P lan Sof tw ar e Project P lan Sof tw ar e De sign Docu men tation Qu alific at ion Te st P lan a n d P roced ures Ac cep t an ce Te st Pla n an d Pro ced u res
Focus on C losu re Relat ion sh ip s (e .g., C orre ct Eq uations U sed ) Fe w P h en omen a/ P rocesses Simple Geomet ry C on tro lled Bou n dary Con d it io ns
In tegr ated Cod e Be h av ior • Fie ld E quat ions • Closu re Rela t ion s • Comp on en t Mod els • N u me rics • Sp ecia l Mo d els Sc enar io Ap p lica bility Sc alin g to P lan t Con d it ion s
Qu alific at ion Te st Plan Qu alific at ion Te st Pr oced u res Qu alific at ion Te st Re p ort Ac cep t an ce Tes t Pla n Ac cep t an ce Tes t Proced u res Ac cep t an ce Rep ort Use r Do cu m en ta tion
Sp ecif ied D esign Fea tu res / Fu n ct io ns Eq u ilib riu m Prob lems C once p t P roblem s A n alyt ical Proble ms N u me rical Met h od Tes ts
A n alyz e Re qu ire men ts D evelo p Pre limin ary Design D evelo p D etaile d D esign D evelo p C ode U nits In spec t ion s Re v iew s
Fig. 2-1. C ode Qua lifica tion Ove rview *
* For ad d it ion al in for mat ion se e N U REG / BR-0167, "Softw are Q u ali ty Assu ran ce P rogra m an d Gu id el ines, " US N RC (Fe bru a ry 1993)
Va lid a tion us in g
O ther Stan d ard s
Rev iew s Au d its Pee r In sp ec tions In f orma l Tests
Verif icat ion an d Valid at ion Pla n Rev ie w an d Au d it P acka ges P eer In sp ectio n Pa ckag es I n for mal Test Plan s, P roced u res, Resu lts
Qua
lific
atio
n T
estin
g*
Val
idat
ion
Test
Mat
rix
UNCLASSIFIED
UNCLASSIFIED
Software ValidationSoftware Validation
PIRT Summary
Process Phenomenon Rank
blow- down
slow depress
Crit Flow Flashing . . . Crit Flow Decay Heat . .
17 15 2 2
PIRT Library • WEC 4-Loop LBLOCA • AP600 LBLOCA • B&W SBLOCA • AP600 SBLOCA • AP600 MSLB • SBWR MSLB • SBWR bottom drain line LOCA • SBWR GDCS line LOCA • AP600 SGTR • Production Reactor DEGB
Acceptance Test
Matrix
TRAC Models
Global
ClosureInterface Area Interface Drag Interface Heat Transfer Wall-Liquid HT Wall-Vapor HT Wall-Liquid Drag Wall-Vapor Drag
Field Equations Components Neutronics Numerics
Information Sources • TRAC Theory Manual • AP600 LBLOCA Developmental Assessment Plan • TRAC PF1/MOD2 AdequacyAssessment: Closure and Special Models
Selected Tests
Experimental Data and Other Test Problems
Features Tests Equilibrium Problems Concept Problems Analytical Problems Numerical Method Tests Fundamental SETs Other SETs IETs Plant Events
Information Sources • OECD SETs Matrix • OECD IETs Matrix • CATHARE Test Matrix • RELAP5 Test Matrix • TRAC Test Matrix • Development History
Selection Criteria for SETs and IETs • Quality of Data • Availability of Data • Range of Data • Nature of Data (Fundamental Desired) • Availability of Existing TRAC Deck
Fig. 2-3. Information sources supporting creation of the Validation Test Matrix.
UNCLASSIFIED
UNCLASSIFIED
TRACE ApplicationsTRACE Applications
• Analysis applications enhance understanding of key processes
– Accidents and transients– Licensees' calculations (auditing)– Test planning– Test assessment– Design performance
• Applications have included PWRs, BWRs, heavy-water reactors, experimental facilities, and accelerator facilities
UNCLASSIFIED
UNCLASSIFIED
DELTA Loop Facility(Liquid Lead-Bismuth Materials Test Loop)
DELTA Loop Facility(Liquid Lead-Bismuth Materials Test Loop)
Heated Section
Sump Tank& Pump
RecuperatorLBE-to-LBE-to-Water
Heat ExchangerTube Side
Shell Side
PumpBypass Line
Melt Tank
Test Section
RecuperatorBypass Line
3.8 m
O2 Injection
• 60kW Heat Input• 58 gpm pump flow• Recuperator• LBE-to-LBE-to-H2O Heat
Exchanger• 2” 316SS Piping • 1” Piping in Test Section• Recuperator and Pump Bypass
Lines• Oxygen Control System• Initial Tests - Late 2001• 48-h Test - August 2002
UNCLASSIFIED
UNCLASSIFIED
Delta Loop TRACE ModelDelta Loop TRACE Model
Delta Loop TRAC Model
960962964230
210
220
250240
PbBi intermediate layer
Water Coolant200
FILL
BREAKBREAKFILL
240 250
220
210
Sump Tank
Pump (insidesump tank)
Bypass Line
10
20
30
50
60
70
80
100
160
110120
140
150
40
Recuperator
Shell Side
Heater
Test SectionPressure Boundary
950
970
10
20 30
40
50 60
70 80
120
130
140
150
170
160
170
Tube Side
Pump Bypass Line
Recuperator Bypass Line
145
145
155
150
180 185
180
190
190195
Valve positions: (1) open for normal operation, closed for natural convection operation(2) closed for normal operation, open for natural convection operation(3) normally closed for both normal and natural convection operation but can be opent to bypass recuperator for natural convection operation
5° 90
90
9595
Expansion TankPressure Boundary
(2)
100110
(1)
(2)
(3)
(1)
130
•TC901
•TC902 •TC903
•TC904•TC905
UNCLASSIFIED
UNCLASSIFIED
48-h Test Data Comparison48-h Test Data Comparison
Comparison of test data to calculated results
325
350
375
400
425
20000 40000 60000 80000 100000 120000 140000 160000
Time (s)
Tem
per
atu
re (
°C)
TC901 HX outlet
TC902 Recup. outlet
TC903 Recup. inlet
TC904 Heater outlet
TC905 Heater inlet
Calculated
Calculated
Calculated
Calculated
Calculated
UNCLASSIFIED
UNCLASSIFIED
TRACE Applications for the LANSCE-1L Test Facility Safety Study
TRACE Applications for the LANSCE-1L Test Facility Safety Study
• LANSCE-1L test facility primary cooling system design study.
– The main objective is to study the effect of the piping connections among the window, upper target, and lower target on the beam shutdown resulting from melting of the window.
– Three piping layouts were studied.• Parallel connection outside the crypt (current layout).• Series connection outside the crypt.• Series connection inside the crypt.
• Loss-of-pump with beam on accident Analysis.
UNCLASSIFIED
UNCLASSIFIED
LANSCE-1L Test Facility LayoutLANSCE-1L Test Facility Layout
• LANSCE 1L-area target crypt consists of an upper target, a lower target, two windows, a lower reflector, an upper reflector, outer reflectors, beam stop, and hydrogen moderator.
• The lower and upper targets and the window are cooled by a closed loop cooling system.
• The lower and upper reflectors and the beam stop are cooled by a separate closed loop cooling system.
UNCLASSIFIED
UNCLASSIFIED
TRACE Model for the Target Cooling System
TRACE Model for the Target Cooling System
Surge TankHeat Exchanger
Pump 1
pump 2
Window
Top target
Lower target
1
5
10
15
20
3032343638
4042444648
5055
65
707577
8081
96
100105110
115
120125 130 135 140 145 150
155
160
5252 50
5560
39
38
49
48
36 34 32
46 44 42
30
40
20
15
160
155
5
1
150145140135130125120
115
70
80
100
7576
81
105
95
110
77
96
111
118116118116
8283
8485
8687
8889
9091
92
9495
93
82
83 84
8586
87 88
8990
91 92
9394
97
60
62
64
64
62
UNCLASSIFIED
UNCLASSIFIED
Three Piping Layouts in the CryptThree Piping Layouts in the Crypt
Inletoutlet
Window
Top Target
Lower Target
Inletoutlet
Window
Top Target
Lower Target
Crypt Vessel
Crypt Vessel
Series Connection outside the crypt vessel
Series connection inside the crypt vessel
Inlet plenumoutlet plenum
Window
Top Target
Lower Target
Crypt VesselCrypt Vessel
Parallel Connection outside the crypt vessel
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
• For a loss-of-pump accident, the TRACE results show that the window will remain cool even with the beam on throughout the transient.
• Window performance is independent of the piping layouts in the crypt. The idea of passively shutting down the beam based on melting the window will not work.
• The flow channel of the window never dries out and the gas volume fraction oscillates about 0.2.
• The window is heated to about 490 K but the upper target is heated to 3200 K at 100 s.
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
Gas Volume Fraction (alpn-075004: window, alpn-081001 and alpn-083001: top-two-flow channels of the upper target)
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
Maximum average rod temperature (tramax-911: window, tramax-901, tramax-902 and tramax-903: target-top-three plates)
UNCLASSIFIED
UNCLASSIFIED
Loss-of-Pump Accident with Beam On Analysis
Loss-of-Pump Accident with Beam On Analysis
640
635
615
610
680
670 630
625
80
605
603
601
602
81
600
655
660
660
655
603604
605600
625
630
670
680
635
640
610
615
teetee
tee
tee
tee
tee
valve
valve
valve
valvevalve
breakbreak
fill heat structure
*The overall TRACE model consists of the system model shown previously, and the crypt model shown here.
TRACE Crypt Model:
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
• The upper target canister reaches the melting temperature (1500 K) at about 41s.
• The cooling system is completely drained at about 140 s• After the cooling system is completely drained, the target
would be cooled by radiation to the cool outside reflectors.• A TRACE radiation model was developed and the
preliminary results show that the upper target reaches about 3200 K at about 300 s and keeps at that temperature throughout the transient.
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
Gas Volume Fractions in the Crypt
0.8600
0.8800
0.9000
0.9200
0.9400
0.9600
0.9800
1.0000
0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0
Time (s)
alp6001alp6003alp6551alp6554
Gas volume fractions in the crypt (alp6551: bottom, alp6554: middle, alp6001 and alp6003: top-two levels)
UNCLASSIFIED
UNCLASSIFIED
TRACE ResultsTRACE Results
Surface Temperatures for the Lumped Steel Plates, Upper and Lower Targe
0.00
500.00
1000.00
1500.00
2000.00
2500.00
3000.00
3500.00
4000.00
0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0
Time (s)
rft812rft901rft910
Surface temperatures (rft812: lumped upper steel plate, rft901: upper target, rft910: lower target)