ML13248A344

WCAP-17548-NP, Revision 2 - Signal Processing Performed on Monticello MSL Strain Gauge and Rsd Instrumentation Data, Enclosure 10

ML13248A344
Person / Time
Site:	Monticello
Issue date:	08/29/2013
From:	Rowland A Westinghouse
To:	Office of Nuclear Reactor Regulation
References
L-MT-13-091, TAC MD9990 WCAP-17548-NP, Rev 2
Download: ML13248A344 (48)

Text

{{#Wiki_filter:L-MT-1 3-091 ENCLOSURE 10 WESTINGHOUSE WCAP-17548-NP, (NONPROPRIETARY) REVISION 2 SIGNAL PROCESSING PERFORMED ON MONTICELLO MSL STRAIN GAUGE AND RSD INSTRUMENTATION DATA 47 pages follow Westinghouse Non-Proprietary Class 3 WCAP-17548-NP Revision 2 Signal Processing Pe on Monticello MSL St Gauge and RSD Instrumentation Data)Westinghouse August 2013 rformed rain WESTINGHOUSE NON-PROPRIETARY CLASS 3 WCAP-17548-NP Revision 2 Signal Processing Performed on Monticello MSL Strain Gauge and RSD Instrumentation Data AnnMarie Rowland*U.S. BWR Engineering August 2013 Reviewer: Inessa E. Berman*U.S. BWR Engineering Approved: Daniel T. McLaughlin*, Manager U.S. BWR Engineering

• Electronically approved records are authenticated in the electronic document management system.Westinghouse Electric Company LLC 1000 Westinghouse Drive Cranberry Township, PA 16066, USA© 2013 Westinghouse Electric Company LLC All Rights Reserved WCAP-17548-NP TABLE OF CONTENTS LIST OF TABLES .......................................................................................................................................

iii LIST OF FIGURES ..................................................................................................................................... iv EXECUTIVE SUM M ARY .......................................................................................................................... vi LIST OF ACRONYM S AND ABBREVIATIONS ................................................................................. vii BACKGROUN D AN D INTRODUCTION .................................................................................. 1-1

1.1 BACKGROUND

OF ACOUSTIC ISSUES AND REQUIREMENTS ........................... 1-1 1.2 REPLACEM ENT OF THE STEAM DRYER ................................................................. 1-2 1.3 PURPOSE ........................................................................................................................ 1-3 2 SUM M ARY OF PREVIOUS W ORK .......................................................................................... 2-1 2.1 ACOUSTIC SCREENING ......................................................................................... 2-1 2.2 SUBSCALE TESTING ................................................................................................... 2-1 2.3 PREVIOUS DATA RECORDINGS ................................................................................ 2-1 2.4 DERIVATION OF INSTRUMENTATION LOCATIONS .............................................. 2-2 3 DATA COLLECTION AND PROCESSING PLAN .................................................................... 3-1 3.1 DATA ACQUISITION AND SIGNAL VALIDITY ........................................................ 3-1 3.2 DATA PROCESSING OVERVIEW ................................................................................ 3-3 3.3 STRAIN TO PRESSURE CONVERSION -MSL STRAIN GAUGE DATA ................ 3-4 3.4 NARROW -BAND FILTERING ...................................................................................... 3-5 3.5 PSD DERIVATION ......................................................................................................... 3-6 3.6 W AVELET DENOISING ................................................................................................ 3-6 3.7 COMPUTATION OF THE PREDICTED EPU SIGNAL ............................................... 3-7 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS .................................................... 4-1 4.1 IN PUTS ........................................................................................................................... 4-1 4.2 ASSUM PTION S .............................................................................................................. 4-1 5 DISCUSSION OF RESULTS .................................................................................................. 5-1 5.1 DATA RECORDING ....................................................................................................... 5-1 5.2 STRAIN TO PRESSURE CONVERSION ..................................................................... 5-4 5.3 FILTERING ................................................................................................................... 5-10 5.4 W AVELET DENOISING .............................................................................................. 5-13 5.5 PREDICTED EPU SIGNAL ......................................................................................... 5-15 6 CONCLUSIONS .......................................................................................................................... 6-1 7 RE FERE NCES ............................................................................................................................. 7-1 WCAP-17548-NP August 2013 Revision 2 iii LIST OF TABLES Table 2-1 Table 2-2 Table 3-1 Table 3-2 Table 3-3 Table 3-4 Table 5-1 Table 5-2 Table 5-3 Table 5-4 Table 5-5 Natural Frequency of [.]b ...................................................................... 2-1............................................................................................ 2 -3[ ]ax ............................. 3-1[]a' ................... ]......................................... 3 -2[ ]a,c ........................................... 3-2[ ]a,c ................................................. 3-2 Transducers and Units ...................................................................................................... 5-1 Dates and Tim es of Data Recording ................................................................................ 5-2[ ]a,c ................................................................... 5 -4[ax .................... 5-5 Sum mary of Narrow-Band Filters ................................................................................. 5-10 WCAP-17548-NP August 2013 Revision 2 iv LIST OF FIGURES Figure 1-1 Schematic of Replacement Steam Dryer ................................................................................. 1-2 Figure 2-1 Schematic of M SL [],b,c ......................................................... 2-2 Figure 2-2 Schematic of [ ]a,b,c ........................................................ 2-3 Figure 2-3 Schematic of [ ]a,b,c ............... 2-4 Figure 2-4 Schematic of [ ]a,b~c ......... 2-4 Figure 2-5 Schematic of [ ]abc........... ........ 2-5 Figure 2-6 Schematic of [ .bc............................................... 2-5 Figure 2-7 Schematic of [ ]ab ................ 2-6 Figure 3-1 Pipe Mode Diagram, N=[0,4] .................................................................................................. 3-4 Figure 5-1 Examples of Transients in Data ............................................................................................... 5-3 Figure 5-2 [ ]bC ..................................... 5-6 Figure 5-3 [ ]b.c .......................................... 5-6 Figure 5-4 [ ]bC ........................... 5-7 Figure 5-5 [ bc .......................... 5-8 Figure 5-6 [ ]b.C ................... 5-8 Figure 5-7 [ ]bC ............................... 5-9 Figure 5-8 [ ]bc ................... 5-12 Figure 5-9 [b C ................................................................. 5 -13 Figure 5-10 []b ................................................................................... 5 -14 Figure 5-11 []b,c ........................................................................... 5 -15 Figure 5-12 CLTP and Predicted EPU Signals, M SL A US .................................................................... 5-16 Figure 5-13 CLTP and Predicted EPU Signals, M SL A DS .................................................................... 5-16 Figure 5-14 CLTP and Predicted EPU Signals, M SL B US .................................................................... 5-17 Figure 5-15 CLTP and Predicted EPU Signals, M SL B DS .................................................................... 5-17 Figure 5-16 CLTP and Predicted EPU Signals, M SL C US .................................................................... 5-18 Figure 5-17 CLTP and Predicted EPU Signals, M SL C DS .................................................................... 5-18 Figure 5-18 CLTP and Predicted EPU Signals, M SL D US ................................................................... 5-19 WCAP-17548-NP August 2013 Revision 2 V I Figure 5-19 CLTP and Predicted EPU Signals, M SL D DS ................................................................... 5-19 WCAP-17548-NP August 2013 Revision 2 vi EXECUTIVE

SUMMARY

Monticello Nuclear generating plant (MNGP, herein referred to as "Monticello") is implementing an extended power uprate (EPU) to increase plant power from current licensed thermal power (CLTP) of]ab To satisfy the requirements of the United States Nuclear Regulatory Commission (NRC) Regulatory Guide 1.20, Revision 3 (Reference 1), an analysis must be performed to demonstrate the structural integrity of reactor internal components, []a,c I]a.c II pac I pc.WCAP-17548-NP August 2013 Revision 2 vii LIST OF ACRONYMS AND ABBREVIATIONS AC alternating current ACE Acoustic Circuit Enhanced BWR boiling water reactor CDI Continuum Dynamics, Inc.CLTP current licensed thermal power DAS data acquisition system DS downstream (used only in figures and tables)EIC electrical interference check EPU extended power uprate GE General Electric MNGP Monticello Nuclear Generating Plant MSL main steam line NRC Nuclear Regulatory Commission OEM original equipment manufacturer PCF pressure conversion factor PSD power spectral density RMS root mean square RPV reactor pressure vessel RRP reactor recirculation pump RSD replacement steam dryer SIA Structural Integrity Associates SNR signal-to-noise ratio SRV safety relief valve STFT Short-time Fourier transform SURE Stein's unbiased risk estimator US upstream (used only in figures and tables)Trademark Note VersaDAS is a registered trademark of Structural Integrity Associates. Other names may be trademarks of their respective owners.WCAP-17548-NP August 2013 Revision 2 1-1 1

1.1 BACKGROUND

AND INTRODUCTION BACKGROUND OF ACOUSTIC ISSUES AND REQUIREMENTS []a,c NRC Regulatory Guide 1.20, Rev. 3 (Reference 1), contains requirements for demonstrating the structural integrity of the steam dryer at power levels higher than CLTP. []ac WCAP-17548-NP August 2013 Revision 2 1-2 1.2 REPLACEMENT OF THE STEAM DRYER I]a.bc a,c Figure 1-1 Schematic of Replacement Steam Dryer I []a~b.c I abc WCAP-1 7548-NP August 2013 WCAP-17548-NP August 2013 Revision 2 1-3 1.3 PURPOSE This report details the signal processing methods used for processing MSL strain gauge data, and the RSD instrumentation data gathered to support the benchrnarking of the Acoustic Circuit Enhanced (ACE)technique used to qualify the steam dryer for acoustic loads at EPU operating conditions. To this end, a summary of the data collection and recorded data at Monticello is contained in this document.Furthermore, specific datasets are shown and discussed in detail with regard to the signal processing performed. The intention of presenting these data is to demonstrate the effect, and support the use, of the signal processing described herein.This report also details the methods applied to the processed CLTP acoustic signature to create a predicted EPU signature. WCAP-1 7548-NP August 2013 WCAP-17548-NP August 2013 Revision 2 2-1 2 2.1

SUMMARY

OF PREVIOUS WORK ACOUSTIC SCREENING I ia,b,c 2.2 SUBSCALE TESTING I laoc I]abc Table 2-1 Natural Frequency of I ]b Natural Frequencies Plant Predicted ( Reference

2) [ ]flC (Reference 4)Sidebranch Freq., Hz Difference Freq., Hz Difference Freq., Hz t I b 2.3 PREVIOUS DATA RECORDINGS

[I[I jac]ab~c WCAP-I 7548-NP August 2013 WCAP-17548-NP August 2013 Revision 2 2-2 ia,b,c]a b.c 2.4 DERIVATION OF INSTRUMENTATION LOCATIONS I 1a3c ac Figure 2-1 Schematic of MSL I rb,c WCAP- 17548-NP August 2013 Revision 2 2-3[]a,c Table 2-2 I H m I.c a,b,c I]a,c I jac a,b,c Figure 2-2 Schematic of [a,b,c WCAP- 17548-NP August 2013 Revision 2 2-4 Figure 2-3 through Figure 2-5 show schematic views of the RSD with the strain gauge locations indicated. The view angle is looking slightly down from above and outside the dryer, similar to the view in the overall dryer schematic seen in Figure 1-1.a,b,c Figure 2-3 Schematic of Figure 2-4 Schematic of [a,b,c a,b,c a,b,c WCAP-! 7548-flP August 2013 Revision 2 2-5 a,b,c Figure 2-5 Schematic of[I]abc a,b,c Figure 2-6 Schematic of I Ia,b,c WCAP-17548-NP August 2013 Revision 2 2-6 a,b,c Figure 2-7 Schematic of I la,b,c[]a,c WCAP- 17548-NP August 2013 Revision 2 3-1 3 DATA COLLECTION AND PROCESSING PLAN The following sections detail the data collection and processing performed on the recorded time histories from Monticello. The processing documented in this report applied to the May 2011 100% CLTP Monticello data and 90% CLTP Monticello data is in Reference

8. The processing documented in this report applied to the remaining Monticello data is in Reference 4 and Reference 7.3.1 DATA ACQUISITION AND SIGNAL VALIDITY II]31C]a,c I Table 3-1 I 1C I-- a,c WCAP- 17548-NP August 2013 Revision 2 3-2 II] axc-Table 3-2 1 Ba,c a,c I]a,c Table 3-3 1 i8,C a,c I Table 3-4 1 I RX flc a,c WCAP-17548-NP August 2013 Revision 2 3-3 ia,b,c a,b,c 3.2 DATA PROCESSING OVERVIEW I WCAP-1 7548-NP August 2013 WCAP- 17548-NP August 2013 Revision 2 3-4 3.3 STRAIN TO PRESSURE CONVERSION

-MSL STRAIN GAUGE DATA]ax L a,c j (3-1)where,[[I]alc]ac]a,c a,c Figure 3-1 Pipe Mode Diagram, N=[0,41 II]a,c WCAP-17548-NP August 2013 Revision 2 3-5 I]aoc L]a,c (3-2)where,[[[]a,c]a,c]a,c I]a,c 3.4 NARROW-BAND FILTERING I]ac I]ac WCAP- 17548-NP August 2013 Revision 2 3-6 3.5 PSD DERIVATION The PSDs used in the methods presented in this report were derived using Welch's modified periodogram method. The signal was divided up into time ensembles with the same number of lines as the sampling frequency, resulting in a 1 Hz frequency resolution in the final PSD. A Harming window was used to reduce spectral leakage, and 50 percent overlap was used to increase the number of ensembles available for averaging.

3.6 WAVELET

DENOISING II]a,c I]a,C I]ac I 1.2.3.[I IC IC I IC WCAP-17548-NP August 2013 Revision 2 3-7 I I c I]C I C (3-3)where,[[Ic I]a.c I] C 3.7 COMPUTATION OF THE PREDICTED EPU SIGNAL I]ac I]a3c WCAP- I 7548-NP August 2013 WCAP- 17548-NP August 2013 Revision 2 4-1 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS 4.1 INPUTS]a,c]a,c 4.2 ASSUMPTIONS The acoustic speed in steam is assumed to be 1,600 ft/s per Reference 12.[] C] ax I pac[]a,c la,c WCAP-1 7548-NP August 2013 WCAP-17548-NP August 2013 Revision 2 5-1 5 5.1 DISCUSSION OF RESULTS DATA RECORDING I]a,c STable 5-1 Transducers and Units Transducer Units L a,c I]a,c I]abxc WCAP-17548-NP August 2013 Revision 2 5-2 Table 5-2 Dates and Times of Data Recording Recording %CLTP Date Time Filename b II]a,c I. [WCAP-17548-NP August 2013 Revision 2 5-3]ac 2.]a~c 3.]a,c]a,c a,c a,c Figure 5-1 Examples of Transients in Data ia,b,c WCAP-17548-NP August 2013 Revision 2 5-4 II]a,b,c I]abc 5.2 STRAIN TO PRESSURE CONVERSION II]a,c I]ac b WCAP- 17548-NP August 2013 Revision 2 5-5 Table 5-4 shows a summary of the removed channels for each of the MSL strain gauge files.I Table 5-4 1 ]8,C I Recording % CLTP Date Stamp Time Selection Removed Channels 1 b I]a,c WCAP- 17548-NP August 2013 Revision 2 5-6 I]a,b,c a,b,c I Figure 5-2 Figure 5-3 [b,c]a,b,c a,b,c b,c WCAP-17548-NP August 2013 Revision 2 5-7 I]a.bc I a,b,c I ja,b,c a,b,c Figure 5-4 [b,c II]ab.c I a,b,c WCAP-17548-NP ARigust 2013 Revision 2 5-8 a,b,c a,b,c Figure 5-5 [Figure 5-6 1 b,c b,c I a.,b.c WCAP- I 7548-NP August 2013 WCAP- 17548-NP August 2013 Revision 2 5-9 a,b,c Figure 5-7 jb,c I a,b,c WCAP- I 7548-NP August 2013 WCAP-17548-NP August 2013 Revision 2 5-10 5.3 FILTERING I]a,c Table 5-5 Summary of Narrow-Band Filters a,b,c WCAP-17548-NP August 2013 Revision 2 5-11 Table 5-5 Summary of Narrow-Band Filters (cont.)a,b,c I]ab.c WCAP-1 7548-NP August 2013 Revision 2 5-12 b Figure 5-8 b,c I a,b,c WCAP- 1 7548-NP August 2013 Revision 2 5-13 5.4 WAVELET DENOISING[]ac I]ac II]C a,b,c Figure 5-9 [I b,c WCAP- 17548-NP August 2013 Revision 2 5-14 IIC a,b,c Figure 5-10 b,c WCAP-17548-NP August 2013 Revision 2 5-15 a,b,c Figure 5-11 1 5.5 PREDICTED EPU SIGNAL I i b.c pac WCAP- 17548-NP August 2013 Revision 2 5-16 b Figure 5-12 CLTP and Predicted EPU Signals, MSL A US b Figure 5-13 CLTP and Predicted EPU Signals, MSL A DS WCAP- 17548-NP August 2013 Revision 2 5-17 b Figure 5-14 CLTP and Predicted EPU Signals, MSL B US b Figure 5-15 CLTP and Predicted EPU Signals, MSL B DS WCAP-17548-NP August 2013 Revision 2 5-18 b Figure 5-16 CLTP and Predicted EPU Signals, MSL C US b Figure 5-17 CLTP and Predicted EPU Signals, MSL C DS WCAP- I 7548-NP August 2013 WCAP- 17548-NP August 2013 Revision 2 5-19 b Figure 5-18 CLTP and Predicted EPU Signals, MSL D US b Figure 5-19 CLTP and Predicted EPU Signals, MSL D DS WCAP- 1 7548-NP August 2013 WCAP-17548-NP AugRist 2013 Revision 2 6-1 6 CONCLUSIONS ]a~b,c The processing steps that define this methodology and that are fully detailed in Reference 8 and summarized in this document can be listed as follows: 1. [2.3. [4. []a,c]a,c]a,c The resulting datasets are the best available representation of the actual plant data with minimal signature influence from background and noise contributions. ]a,c WCAP-17548-NP August 2013 Revision 2 7-1 7 REFERENCES

1. United States Nuclear Regulatory Commission Regulatory Guide 1.20, Rev. 3, "Comprehensive Vibration Assessment Program for Reactor Internals During Preoperational and Initial Startup Testing," March 2007.2. []a,c 3. [4.5.6.a,c]a,c]a,c]a,c 7. []a,c 8. []a.c 9. [pc 10. Jacob Benesty, M. Mohan Sondhi, and Yiteng Huang (Eds.), Springer Handbook of Speech Processing, Springer, Berlin, 2008.11. 0. Cappe, "Elimination of the Musical Noise Phenomenon with the Ephraim and Malah Noise Suppressor," IEEE Transactions of Speech and Audio Processing (April 1994): Vol. 2, 345-349.12. ASME, "ASME Steam Tables," Fifth Edition, 1983.13. []a,c WCAP-17548-NP August 2013 Revision 2 7-2 14. Structural Integrity Associates Calculation Package, MONT- I1Q-303, Rev. 1, "Monticello Main Steam Strain Gage Data Reduction," January 21, 2009.15. Xcel Energy Design Information Transmittal, DIT 13638-10, "Extended Power Uprate Implementation," June 24, 2011.WCAP-17548-NP August 2013 Revision 2}}