Attachment 11
Peach Bottom Atomic Power Station Units 2 and 3
NRC Docket Nos. 50-277 and 50-278
WCAP-17639, Rev 3. Instrumentation Description for the Peach Bottom Unit 2Replacement Steam Dryer
Westinghouse Non-Proprietary Class 3
WCAP-17639-NP FebrRevision 3Enclosure B.7
Instrumentation Descriptionfor the Peach Bottom Unit 2Replacement Steam Dryer
) Westinghouse
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Instrumentation Description forthe Peach Bottom Unit 2Replacement Steam Dryer
Author
Kristen Kahsar*
Reviewed by
David A. Suddaby*
February 2014
Approved: David R. Forsyth*, ManagerBWR Plant & Stress Analysis
*Electronically approved records are authenticated in the electronic document management system.
Westinghouse Electric Company LLC1000 Westinghouse Drive
Cranberry Township, PA 16066, USA
© 2014 Westinghouse Electric Company LLCAll Rights Reserved
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RECORD OF REVISIONS
Revision Description Completed
0 Original issue 08/17/2012
1 Revised in accordance with customer audit. Due to the extent of revisions, change bars 8/27/2012are not used.
2 Revised in accordance with customer audit. Due to the extent of revisions, change bars 9/25/2012are not used.
3 Revised to incorporate details on new instruments and additional pressure transducer See EDMSlocations.
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TABLE OF CONTENTS
R E C O R D O F RE V ISIO N S .......................................................................................................................... ii
L IST O F TA B L E S ....................................................................................................................................... iv
L IST O F F IG U R E S ...................................................................................................................................... V
L IST O F A C R O N Y M S ................................................................................................................................ vi
1 IN T R O D U C T IO N ........................................................................................................................ 1-12 INSTRUMENTATION OVERVIEW ........................................................................................... 2-13 DATA ACQUISITION AND REDUCTION SYSTEM ................................................................ 3-1
3.1 INSTRUMENT SPECIFICATIONS ................................................................................ 3-13.2 INSTRUMENT POSITIONS .......................................................................................... 3-13.3 ENSURING ACQUISITION OF QUALITY DATA ....................................................... 3-33.4 ONLINE DATA EVALUATION SYSTEM ..................................................................... 3-33.5 DETERMINING FREQUENCY, MODAL CONTENT, AND MAXIMUM VALUES. 3-43.6 BIAS ERRORS AND RANDOM UNCERTAINTIES .................................................... 3-4
4 REFERENCES ............................................................................................................................. 4-1
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LIST OF TABLES
T ab le 3-1 ]a,c ................................................................................. 3-1
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LIST OF FIGURES
F igure I-1 [ ]a,c ............................................................... 1-1
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LIST OF ACRONYMS
AcronymDASNRC
OEMRAI
Definitiondata acquisition systemU.S. Nuclear Regulatory Commissionoriginal equipment manufacturerrequest for additional information
Trademark Note:
INCONEL is a registered trademark of the Special Metals Corporation group of companies.
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1 INTRODUCTION
Exelon is replacing the original equipment manufacturer (OEM) steam dryers at its Peach Bottom site.The Peach Bottom site has two reactors numbered Unit 2 and Unit 3 that will have their steam dryersreplaced with Westinghouse-designed steam dryers.
This document describes the instrumentation to be installed on the Peach Bottom Unit 2 replacementsteam dryer (shown in Figure 1-1). This dryer will be the first of the two installed. The Peach Bottom Unit2 steam dryer will be considered a "Prototype" design consistent with the U.S. Nuclear RegulatoryCommision (NRC) document Regulatory Guide 1.20, "Comprehensive Vibration Assessment Program forReactor Internals During Preoperational and Initial Startup Testing" (Reference 1).
]a,c
a,c
Figure 1-1 [ Ia,C
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2 INSTRUMENTATION OVERVIEW
I
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3 DATA ACQUISITION AND REDUCTION SYSTEM
Sections 3.1 through 3.6 address subitems (a) through (f) of Section 2.2, item 1, in Regulatory Guide 1.20(Reference 1). The material is limited to description of direct steam dryer instrumentation.
3.1 INSTRUMENT SPECIFICATIONS
Consistent with the guidance contained in RG 1.20 (Reference 1), this section describes theaccelerometer, pressure transducer, and strain gauge being used to instrument the steam dryer. Table 3-1summarizes the instruments.
Table 3-1 [ ]a,c
I
]a.b,c
[ ]ab,.c
3.2 INSTRUMENT POSITIONS
Regulatory Guide 1.20 requests details on the "transducer positions, which should be sufficient to monitor
significant lateral, vertical, and torsional structural motions of major reactor internals components in shell,beam, and rigid body modes of vibration, as well as significant hydraulic responses and those parametersthat can be used to confirm the input forcing function" (Reference 1). This section describes the criteria
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used to identify locations for the accelerometers, pressure transducers, and strain gauges installed on thesteam dryer.
a,c
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3.3 ENSURING ACQUISITION OF QUALITY DATA
Regulatory Guide 1.20 requests details on the "precautions being taken to ensure acquisition of qualitydata (e.g., optimization of signal-to-noise ratio, relationship of recording times to data reductionrequirements, choice of instrumentation system)" (Reference 1).
]a.c
3.4 ONLINE DATA EVALUATION SYSTEM
Regulatory Guide 1.20 requests details on the "online data evaluation system to provide immediateverification of general data quality" (Reference 1).
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ia,b,c
3.5 DETERMINING FREQUENCY, MODAL CONTENT, AND MAXIMUM VALUES
Regulatory Guide 1.20 requests details on the "procedures for determining frequency, modal content, andmaximum values of response" (Reference 1).
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3.6 BIAS ERRORS AND RANDOM UNCERTAINTIES
Regulatory Guide 1.20 requests details on "all bias errors (such as model underprediction) and random
uncertainties (such as instrumentation error) associated with the instrumentation and data acquisition
systems" (Reference 1).
[
]a,
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4 REFERENCES
1. U.S. Nuclear Regulatory Commission, Regulatory Guide 1.20, Revision 3, "ComprehensiveVibration Assessment Program for Reactor Internals During Preoperational and Initial StartupTesting," March 2007.
2. Deleted.
3. WCAP-17609-P, Revision 2, "Peach Bottom Units 2 and 3 Replacement Steam Dryer StructuralEvaluation for High-Cycle Acoustic Loads," February 2014. (Westinghouse Proprietary Class 2)
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