ML13092A349

Enclosure 10 to L-MT-13-029 - WCAP-17548-NP, Revision 1, Signal Processing Performed on Monticello MSL Strain Gauge and Rsd Instrumentation Data.

ML13092A349
Person / Time
Site:	Monticello
Issue date:	03/29/2013
From:	Rowland A M Westinghouse
To:	Office of Nuclear Reactor Regulation
References
L-MT-13-029, TAC MD9990 WCAP-17548-NP, Rev 1
Download: ML13092A349 (43)

Text

{{#Wiki_filter:L-MT-1 3-029 ENCLOSURE 10 WESTINGHOUSE WCAP-17548-NP, (NONPROPRIETARY) REVISION 1 SIGNAL PROCESSING PERFORMED ON MONTICELLO MSL STRAIN GAUGE AND RSD INSTRUMENTATION DATA 42 pages follow Westinghouse Non-Proprietary Class 3 WCAP-17548-NP March 2(Revision 1 Signal Processing Performed on Monticello MSL Strain Gauc and RSD Instrumentation Data Westinghouse J13 WESTINGHOUSE NON-ROPRIETARY CLASS 3 WCAP-17548-NP Revision 1 Signal Processing Performed on Monticello MSL Strain Gauge and RSD Instrumentation Data AnnMarie Rowland*U.S. BWR Engineering March 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.docx-032013 TABLE OF CONTENTS LIST OF TABLES .......................................................................................................................................

iii LIST OF FIGURES ..................................................................................................................................... iv EXECUTIVE SUM M ARY ........................................................................................................................... v LIST OF ACRONYM S AND ABBREVIATIONS ................................................................................. vi BACKGROUND AND INTRODUCTION ............................................................................... 1-I

1.1 BACKGROUND

OF ACOUSTIC ISSUES AND REQUIREMENTS ........................... 1-1 1.2 REPLACEMENT OF THE STEAM DRYER ................................................................. 1-2 1.3 PURPOSE ........................................................................................................................ 1-3 2

SUMMARY

OF PREVIOUS W ORK .......................................................................................... 2-1 2.1 ACOUSTIC SCREENING .............................................................................................. 2-1 2.2 SUBSCALE TESTING ................................................................................................ 2-I 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 WAVELET DENOISING ................................................................................................ 3-6 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS .................................................... 4-1 4.1 IN PUTS ........................................................................................................................... 4-1 4.2 ASSUMPTIONS .............................................................................................................. 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 WAVELET DENOISING .............................................................................................. 5-13 6 CONCLUSIONS .......................................................................................................................... 6-1 7 RE FERENCES ............................................................................................................................. 7-1 WCAP- 17548-NP March 2013 Revision I iii 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 LIST OF TABLES Natural Frequency of [.]b .............................................................. 2-1[ ]c ............................................................................................ 2-3[] ................ ]......... .3-1[ac ............................................................. 3-2[ ax ...................................... 3-2[ ]a,c .................................................. 3-2 Transducers and Units ................................................................................................ 5-1 Dates and Times of Data Recording ................................................................................ 5-2[ ................................................................... 5-4[ ....... 5-5 Summary of Narrow-Band Filters ................................................................................. 5-10 WCAP- 17548-NP March 2013 Revision 1 iv LIST OF FIGURES Figure 1-1 Schematic of Replacement Steam Dryer ................................................................................. 1-2 Figure 2-1 Schematic of M SL []abc ......................................................... 2-3 Figure 2-2 Schematic of [ ]ab,c ........................................................ 2-3 Figure 2-3 Schematic of [ ],b.¢................. 2-4 Figure 2-4 Schematic of [ ]a,b,c ................ 2-4 Figure 2-5 Schematic of [ ]a,"c .......................... 2-5 Figure 2-6 [ ]a".c ........................................ 2-5 Figure 2-7 Schematic of [ ]ab.c ................ 2-6 Figure 3-1 Pipe M ode Diagram, N=[0,4] .................................................................................................. 3-4 Figure 5-1 Examples of Transients in Data ............................................................................................... 5-3 Figure 5-2 M SL [ ]bC .................................. 5-6 Figure 5-3 [ ]b~c ......................................... 5-6 Figure 5-4 [ ]b~c .......................... 5-7 Figure 5-5 [ ]b,c ........................... 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.c. ..................................... 5-14 Figure 5-11 []bC ................................... 5-15 WCAP-17548-NP March 2013 Revision I V EXECUTIVE

SUMMARY

Monticello Nuclear generating plant (MNGP, herein referred to as "Monticello") is implementing an extended power uprate (EPU) to increase plant power to []pc. 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, Ia~c I Sasc II I a~c[[I 3,C I Ia~c WCAP- 17548-NP March 2013 Revision 1 vi 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 March 2013 Revision 1 1-1 1 BACKGROUND AND INTRODUCTION

1.1 BACKGROUND

OF ACOUSTIC ISSUES AND REQUIREMENTS [NRC Regulatory Guide 120, Rev. 3 (Reference 1), contains requirements for demonstrating the structural integrity of the steam dryer at power levels higher than CLTP.]a,c WCAP- 17548-NP March 2013 Revision 1 1-2 1.2 REPLACEMENT OF THE STEAM DRYER I]ab c a,c Figure 1-1 Schematic of Replacement Steam Dryer[]ab c II]aob~c WCAP- 17548-NP March 2013 Revision 1 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 benchmarking 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.WCAP- 17548-NP March 2013 Revision 1 2-1 2

SUMMARY

OF PREVIOUS WORK 2.1 ACOUSTIC SCREENING[]ab~c 2.2 SUBSCALE TESTING I lac II]ab c Table 2-1 Natural Frequency of I Predicted ( Reference Error! Reference source not found.)Sidebranch Freq., Hz Difference I Natural Frequencies E 2.3 PREVIOUS DATA RECORDINGS [II.I] ac WCAP-17548-NP March 2013 Revision I 2-2 a,,b,c ba,b,c a,b,c 2.4 DERIVATION OF INSTRUMENTATION LOCATIONS[]aac a,c WCAP-17548-NP March 2013 Revision I 2-3 Figure 2-1 Schematic of MSL I Ia,b,c II I axc Table 2-2 I I aH,c a,b,c II I a~c II Figure 2-2 Schematic of [a,b,c abc WCAP- 17548-NP March 2013 Revision 1 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 a,b,c a,b,c Figure 2-3 Schematic of [Figure 2-4 Schematic of I 1 a,b,c WCAP- 17548-NP March 2013 Revision 1 2-5 a,b,c a,b,c Figure 2-5 Schematic of I II a,b,c Figure 2-6 1 Ia,b,c WCAP- 17548-NP March 2013 Revision 1 2-6 a,b,c Figure 2-7 Schematic of [Ia,b,c[]a,c WCAP- 17548-NP March 2013 Revision I 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 Error! Reference source not found..3.1 DATA ACQUISITION AND SIGNAL VALIDITY[I aWc]a,c II Table 3-1 [ ]J'c 1 a,c WCAP- 17548-NP March 2013 Revision I 3-2 II I a3c Table 3-2 Table 3-3 I -laC a,c I]ac IaC a,c II Pac K Table 3-4 1 I aC K a,c WCAP- 1 7548-NP March 2013 WCAP- 17548-NP March 2013 Revision I 3-3]a,b,c Ia,b,c 3.2 DATA PROCESSING OVERVIEW I]ab c WCAP- 17548-NP March 2013 Revision I 3-4 3.3 STRAIN TO PRESSURE CONVERSION

-MSL STRAIN GAUGE DATA I]o,o L a'c(3-1)where,[[[pac I a~c I a'c a,c Figure 3-1. Pipe Mode Diagram, N=10,41 I I a~c WCAP- 17548-NP March 2013 Revision I 3-5 II] a L]ac (3-2)where,[[[ja'c] ac] a II]a,c 3.4 NARROW-BAND FILTERING I]r C I I a'C WCAP- 17548-NP March 2013 Revision I 3.5 PSD DERIVATION 3-6 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 Hanning 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]a,c]a,c IIC]aC 1. [I 2. []3 [WCAP- 17548-NP March 2013 Revision 1 3-7 IIC c (3-3)where,[ C I[ ]] c WCAP- 17548-NP March 2013 Revision I 4-1 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS

4.1 INPUTS

a~c]a,c 4.2 ASSUMPTIONS II]C[Ic The acoustic speed in steam is assumed to be 1,600 ft/s per Reference 12.[I ac[I a~c I f aC WCAP- 17548-NP March 2013 Revision I 5-1 5 5.1 DISCUSSION OF RESULTS DATA RECORDING II I a5c Table 5-1 Transducers and Units Transducer Units L 2 a,c I]a,c II Ia,bc, WCAP- 17548-NP March 2013 Revision I 5-2 Table 5-2 Dates 5-2 and Times of Data Recording Recording %CLTP Filename Date Time b I I a~c 1. [WCAP- 17548-NP March 2013 Revision 1 5-3] as 2. II] as 3.] as[]a,c[I ax a,c Figure 5-1 Examples of Transients in Data I WCAP- 17548-NP March 2013 Revision 1 5-4 5-] ,bc I]ab c 5.2 STRAIN TO PRESSURE CONVERSION I]a~C II]Eas b WCAP- 17548-NP March 2013 Revision I 5-5 Table 5-4 shows a summary of the removed channels for each of the MSL strain gauge files.Table 5-4 [ ]a,c Recording % CLTP Date Stamp Time Selection I Removed Channels b I]a,c WCAP- 17548-NP March 2013 Revision I 5-6 II ia,b,c a,b,c II Figure 5-2 MSL [Figure 5-3 1 l b,C]ab.c a,b,c b,c WCAP- 17548-NP March 2013 Revision I 5-7 ja,b,c a~b,c]a,b.c a,b,c Figure 5-4 [ jb,c]a,b,c a,b,c WCAP-17548-NP March 2013 Revision 1 5-8 a,b,c Figure 5-5 [Figure 5-6 1 b,c a,b,c jb,c I]a,b, c WCAP-17548-NP March 2013 Revision I 5-9 a,b,c Figure 5-7 1 b,c II]a-b,c WCAP- 17548-NP March 2013 Revision 1 5-10 5.3 FILTERING I]a~c Table 5-5 Summary of Narrow-Band Filters a,b,c WCAP- 17548-NP March 2013 Revision 1 5-11 Table 5-5 Summary of Narrow-Band Filters (cont.)a,b,c II]ab.c WCAP- 17548-NP March 2013 Revision I 5-12 b Figure 5-8 1 jb,c I Sab,c WCAP- 17548-NP March 2013 Revision 1 5-13 5.4 WAVELET DENOISING I]ac II]a,c II IC a,b,c Figure 5-9 [Jb,c WCAP- 17548-NP March 2013 Revision I 5-14 II a,b,c Figure 5-10 1 ib,C WCAP- 17548-NP March 2013 Revision I 5-15 a,b,c Figure 5-11 1 b,c WCAP- 17548-NP March 2013 Revision 1 6-1 6 CONCLUSIONS [a,b.c The processing steps that define this methodology and that are fully detailed in Reference Error!Reference source not found. and summarized in this document can be listed as follows: 1. [2. [3.4.Sa-c]a,c I 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. WCAP- 1 7548-NP March 2013 WCAP- 17548-NP March 2013 Revision I 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.Ia~c 3.4.5.6.Sac] ax]a.c I a~c 7. [Ia~c 8. [Sac 9. [I a~c 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 March 2013 Revision I 7-2 14. Structural Integrity Associates Calculation Package, MONT-I IQ-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 March 2013 Revision I}}