ML13248A344
| 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 3-091ENCLOSURE 10WESTINGHOUSE WCAP-17548-NP, (NONPROPRIETARY) REVISION 2SIGNAL PROCESSING PERFORMED ON MONTICELLO MSL STRAIN GAUGE ANDRSD INSTRUMENTATION DATA47 pages follow Westinghouse Non-Proprietary Class 3WCAP-17548-NP Revision 2Signal Processing Peon Monticello MSL StGauge and RSDInstrumentation Data)Westinghouse August 2013rformedrain WESTINGHOUSE NON-PROPRIETARY CLASS 3WCAP-17548-NP Revision 2Signal Processing Performed on Monticello MSL StrainGauge and RSD Instrumentation DataAnnMarie Rowland*U.S. BWR Engineering August 2013Reviewer: Inessa E. Berman*U.S. BWR Engineering Approved: Daniel T. McLaughlin*, ManagerU.S. BWR Engineering
- Electronically approved records are authenticated in the electronic document management system.Westinghouse Electric Company LLC1000 Westinghouse DriveCranberry
- Township, PA 16066, USA© 2013 Westinghouse Electric Company LLCAll Rights ReservedWCAP-17548-NP TABLE OF CONTENTSLIST OF TABLES .......................................................................................................................................
iiiLIST OF FIGURES ..................................................................................................................................... ivEXECUTIVE SUM M ARY .......................................................................................................................... viLIST OF ACRONYM S AND ABBREVIATIONS ................................................................................. viiBACKGROUN D AN D INTRODUCTION .................................................................................. 1-11.1 BACKGROUND OF ACOUSTIC ISSUES AND REQUIREMENTS ........................... 1-11.2 REPLACEM ENT OF THE STEAM DRYER ................................................................. 1-21.3 PURPOSE ........................................................................................................................ 1-32 SUM M ARY OF PREVIOUS W ORK .......................................................................................... 2-12.1 ACOUSTIC SCREENING ......................................................................................... 2-12.2 SUBSCALE TESTING ................................................................................................... 2-12.3 PREVIOUS DATA RECORDINGS ................................................................................ 2-12.4 DERIVATION OF INSTRUMENTATION LOCATIONS .............................................. 2-23 DATA COLLECTION AND PROCESSING PLAN .................................................................... 3-13.1 DATA ACQUISITION AND SIGNAL VALIDITY ........................................................ 3-13.2 DATA PROCESSING OVERVIEW ................................................................................ 3-33.3 STRAIN TO PRESSURE CONVERSION -MSL STRAIN GAUGE DATA ................ 3-43.4 NARROW -BAND FILTERING ...................................................................................... 3-53.5 PSD DERIVATION ......................................................................................................... 3-63.6 W AVELET DENOISING ................................................................................................ 3-63.7 COMPUTATION OF THE PREDICTED EPU SIGNAL ............................................... 3-74 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS .................................................... 4-14.1 IN PUTS ........................................................................................................................... 4-14.2 ASSUM PTION S .............................................................................................................. 4-15 DISCUSSION OF RESULTS .................................................................................................. 5-15.1 DATA RECORDING ....................................................................................................... 5-15.2 STRAIN TO PRESSURE CONVERSION ..................................................................... 5-45.3 FILTERING ................................................................................................................... 5-105.4 W AVELET DENOISING .............................................................................................. 5-135.5 PREDICTED EPU SIGNAL ......................................................................................... 5-156 CONCLUSIONS .......................................................................................................................... 6-17 RE FERE NCES ............................................................................................................................. 7-1WCAP-17548-NP August 2013Revision 2 iiiLIST OF TABLESTable 2-1Table 2-2Table 3-1Table 3-2Table 3-3Table 3-4Table 5-1Table 5-2Table 5-3Table 5-4Table 5-5Natural Frequency of [.]b ...................................................................... 2-1............................................................................................ 2 -3[ ]ax ............................. 3-1[]a' ................... ]......................................... 3 -2[ ]a,c ........................................... 3-2[ ]a,c ................................................. 3-2Transducers and Units ...................................................................................................... 5-1Dates and Tim es of Data Recording ................................................................................ 5-2[ ]a,c ................................................................... 5 -4[ax .................... 5-5Sum mary of Narrow-Band Filters ................................................................................. 5-10WCAP-17548-NP August 2013Revision 2 ivLIST OF FIGURESFigure 1-1 Schematic of Replacement Steam Dryer ................................................................................. 1-2Figure 2-1 Schematic of M SL [],b,c ......................................................... 2-2Figure 2-2 Schematic of [ ]a,b,c ........................................................ 2-3Figure 2-3 Schematic of [ ]a,b,c ............... 2-4Figure 2-4 Schematic of [ ]a,b~c ......... 2-4Figure 2-5 Schematic of [ ]abc........... ........ 2-5Figure 2-6 Schematic of [ .bc............................................... 2-5Figure 2-7 Schematic of [ ]ab ................ 2-6Figure 3-1 Pipe Mode Diagram, N=[0,4] .................................................................................................. 3-4Figure 5-1 Examples of Transients in Data ............................................................................................... 5-3Figure 5-2 [ ]bC ..................................... 5-6Figure 5-3 [ ]b.c .......................................... 5-6Figure 5-4 [ ]bC ........................... 5-7Figure 5-5 [ bc .......................... 5-8Figure 5-6 [ ]b.C ................... 5-8Figure 5-7 [ ]bC ............................... 5-9Figure 5-8 [ ]bc ................... 5-12Figure 5-9 [b C ................................................................. 5 -13Figure 5-10 []b ................................................................................... 5 -14Figure 5-11 []b,c ........................................................................... 5 -15Figure 5-12 CLTP and Predicted EPU Signals, M SL A US .................................................................... 5-16Figure 5-13 CLTP and Predicted EPU Signals, M SL A DS .................................................................... 5-16Figure 5-14 CLTP and Predicted EPU Signals, M SL B US .................................................................... 5-17Figure 5-15 CLTP and Predicted EPU Signals, M SL B DS .................................................................... 5-17Figure 5-16 CLTP and Predicted EPU Signals, M SL C US .................................................................... 5-18Figure 5-17 CLTP and Predicted EPU Signals, M SL C DS .................................................................... 5-18Figure 5-18 CLTP and Predicted EPU Signals, M SL D US ................................................................... 5-19WCAP-17548-NP August 2013Revision 2 VI Figure 5-19 CLTP and Predicted EPU Signals, M SL D DS ................................................................... 5-19WCAP-17548-NP August 2013Revision 2 viEXECUTIVE SUMMARYMonticello Nuclear generating plant (MNGP, herein referred to as "Monticello") is implementing anextended 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 internalcomponents, []a,cI]a.cIIpacIpc.WCAP-17548-NP August 2013Revision 2 viiLIST OF ACRONYMS AND ABBREVIATIONS AC alternating currentACE Acoustic Circuit EnhancedBWR boiling water reactorCDI Continuum
- Dynamics, Inc.CLTP current licensed thermal powerDAS data acquisition systemDS downstream (used only in figures and tables)EIC electrical interference checkEPU extended power uprateGE General ElectricMNGP Monticello Nuclear Generating PlantMSL main steam lineNRC Nuclear Regulatory Commission OEM original equipment manufacturer PCF pressure conversion factorPSD power spectral densityRMS root mean squareRPV reactor pressure vesselRRP reactor recirculation pumpRSD replacement steam dryerSIA Structural Integrity Associates SNR signal-to-noise ratioSRV safety relief valveSTFT Short-time Fourier transform SURE Stein's unbiased risk estimator US upstream (used only in figures and tables)Trademark NoteVersaDAS is a registered trademark of Structural Integrity Associates.
Other names may be trademarks oftheir respective owners.WCAP-17548-NP August 2013Revision 2 1-111.1BACKGROUND AND INTRODUCTION BACKGROUND OF ACOUSTIC ISSUES AND REQUIREMENTS []a,cNRC 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. []acWCAP-17548-NP August 2013Revision 2 1-21.2 REPLACEMENT OF THE STEAM DRYERI]a.bca,cFigure 1-1 Schematic of Replacement Steam DryerI []a~b.cIabcWCAP-1 7548-NP August 2013WCAP-17548-NP August 2013Revision 2 1-31.3 PURPOSEThis report details the signal processing methods used for processing MSL strain gauge data, and the RSDinstrumentation 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, asummary 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 thesignal 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 2013WCAP-17548-NP August 2013Revision 2 2-122.1SUMMARY OF PREVIOUS WORKACOUSTIC SCREENING Iia,b,c2.2 SUBSCALE TESTINGIlaocI]abcTable 2-1 Natural Frequency of I ]bNatural Frequencies PlantPredicted ( Reference
- 2) [ ]flC (Reference 4)Sidebranch Freq., Hz Difference Freq., Hz Difference Freq., HztI b2.3 PREVIOUS DATA RECORDINGS
[I[Ijac]ab~cWCAP-I 7548-NP August 2013WCAP-17548-NP August 2013Revision 2 2-2ia,b,c]a b.c2.4 DERIVATION OF INSTRUMENTATION LOCATIONS I1a3cacFigure 2-1 Schematic of MSL Irb,cWCAP- 17548-NPAugust 2013Revision 2 2-3[]a,cTable 2-2IH mI.ca,b,cI]a,cIjaca,b,cFigure 2-2 Schematic of [a,b,cWCAP- 17548-NPAugust 2013Revision 2 2-4Figure 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 viewin the overall dryer schematic seen in Figure 1-1.a,b,cFigure 2-3 Schematic ofFigure 2-4 Schematic of [a,b,ca,b,ca,b,cWCAP-! 7548-flPAugust 2013Revision 2 2-5a,b,cFigure 2-5 Schematic of[I]abca,b,cFigure 2-6 Schematic of IIa,b,cWCAP-17548-NP August 2013Revision 2 2-6a,b,cFigure 2-7 Schematic of Ila,b,c[]a,cWCAP- 17548-NPAugust 2013Revision 2 3-13 DATA COLLECTION AND PROCESSING PLANThe 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% CLTPMonticello data and 90% CLTP Monticello data is in Reference
- 8. The processing documented in thisreport applied to the remaining Monticello data is in Reference 4 and Reference 7.3.1 DATA ACQUISITION AND SIGNAL VALIDITYII]31C]a,cITable 3-1 I 1C I-- a,cWCAP- 17548-NPAugust 2013Revision 2
3-2II] axc-Table 3-2 1Ba,ca,cI]a,cTable 3-3 1i8,Ca,cITable 3-4 1I RXflca,cWCAP-17548-NP August 2013Revision 2 3-3ia,b,ca,b,c3.2 DATA PROCESSING OVERVIEWIWCAP-1 7548-NP August 2013WCAP- 17548-NPAugust 2013Revision 2 3-43.3 STRAIN TO PRESSURE CONVERSION -MSL STRAIN GAUGE DATA]axLa,cj (3-1)where,[[I]alc]ac]a,ca,cFigure 3-1 Pipe Mode Diagram, N=[0,41II]a,cWCAP-17548-NP August 2013Revision 2 3-5I]aocL]a,c(3-2)where,[[[]a,c]a,c]a,cI]a,c3.4 NARROW-BAND FILTERING I]acI]acWCAP- 17548-NPAugust 2013Revision 2 3-63.5 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 samplingfrequency, resulting in a 1 Hz frequency resolution in the final PSD. A Harming window was used toreduce spectral
- leakage, and 50 percent overlap was used to increase the number of ensembles available for averaging.
3.6 WAVELET DENOISING II]a,cI]a,CI]acI1.2.3.[IICICIICWCAP-17548-NP August 2013Revision 2 3-7II cI]CIC(3-3)where,[[IcI]a.cI] C3.7 COMPUTATION OF THE PREDICTED EPU SIGNALI]acI]a3cWCAP- I 7548-NP August 2013WCAP- 17548-NPAugust 2013Revision 2 4-14 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS 4.1 INPUTS]a,c]a,c4.2 ASSUMPTIONS The acoustic speed in steam is assumed to be 1,600 ft/s per Reference 12.[] C] axIpac[]a,cla,cWCAP-1 7548-NP August 2013WCAP-17548-NP August 2013Revision 2 5-155.1DISCUSSION OF RESULTSDATA RECORDING I]a,cSTable 5-1Transducers and UnitsTransducer UnitsLa,cI]a,cI]abxcWCAP-17548-NP August 2013Revision 2 5-2Table 5-2 Dates and Times of Data Recording Recording %CLTPDate TimeFilenamebII]a,cI. [WCAP-17548-NP August 2013Revision 2 5-3]ac2.]a~c3.]a,c]a,ca,ca,cFigure 5-1 Examples of Transients in Dataia,b,cWCAP-17548-NP August 2013Revision 2 5-4II]a,b,cI]abc5.2 STRAIN TO PRESSURE CONVERSION II]a,cI]acbWCAP- 17548-NPAugust 2013Revision 2 5-5Table 5-4 shows a summary of the removed channels for each of the MSL strain gauge files.I Table 5-4 1 ]8,CI Recording % CLTPDate Stamp Time Selection Removed Channels 1bI]a,cWCAP- 17548-NPAugust 2013Revision 2 5-6I]a,b,ca,b,cIFigure 5-2Figure 5-3 [b,c]a,b,ca,b,cb,cWCAP-17548-NP August 2013Revision 2 5-7I]a.bcIa,b,cIja,b,ca,b,cFigure 5-4 [b,cII]ab.cIa,b,cWCAP-17548-NP ARigust 2013Revision 2 5-8a,b,ca,b,cFigure 5-5 [Figure 5-6 1b,cb,cIa.,b.cWCAP- I 7548-NP August 2013WCAP- 17548-NPAugust 2013Revision 2 5-9a,b,cFigure 5-7jb,cIa,b,cWCAP- I 7548-NP August 2013WCAP-17548-NP August 2013Revision 2 5-105.3 FILTERING I]a,cTable 5-5Summary of Narrow-Band Filtersa,b,cWCAP-17548-NP August 2013Revision 2 5-11Table 5-5 Summary of Narrow-Band Filters (cont.)a,b,cI]ab.cWCAP-1 7548-NPAugust 2013Revision 2 5-12bFigure 5-8b,cIa,b,cWCAP- 1 7548-NPAugust 2013Revision 2 5-135.4 WAVELET DENOISING []acI]acII]Ca,b,cFigure 5-9 [I b,cWCAP- 17548-NPAugust 2013Revision 2 5-14IICa,b,cFigure 5-10b,cWCAP-17548-NP August 2013Revision 2 5-15a,b,cFigure 5-11 15.5 PREDICTED EPU SIGNALIi b.cpacWCAP- 17548-NPAugust 2013Revision 2 5-16bFigure 5-12 CLTP and Predicted EPU Signals, MSL A USbFigure 5-13 CLTP and Predicted EPU Signals, MSL A DSWCAP- 17548-NPAugust 2013Revision 2 5-17bFigure 5-14 CLTP and Predicted EPU Signals, MSL B USbFigure 5-15 CLTP and Predicted EPU Signals, MSL B DSWCAP-17548-NP August 2013Revision 2 5-18bFigure 5-16 CLTP and Predicted EPU Signals, MSL C USbFigure 5-17 CLTP and Predicted EPU Signals, MSL C DSWCAP- I 7548-NP August 2013WCAP- 17548-NPAugust 2013Revision 2 5-19bFigure 5-18 CLTP and Predicted EPU Signals, MSL D USbFigure 5-19 CLTP and Predicted EPU Signals, MSL D DSWCAP- 1 7548-NP August 2013WCAP-17548-NP AugRist 2013Revision 2 6-16 CONCLUSIONS ]a~b,cThe processing steps that define this methodology and that are fully detailed in Reference 8 andsummarized in this document can be listed as follows:1. [2.3. [4. []a,c]a,c]a,cThe resulting datasets are the best available representation of the actual plant data with minimal signature influence from background and noise contributions. ]a,cWCAP-17548-NP August 2013Revision 2 7-17 REFERENCES
- 1. United States Nuclear Regulatory Commission Regulatory Guide 1.20, Rev. 3, "Comprehensive Vibration Assessment Program for Reactor Internals During Preoperational and Initial StartupTesting,"
March 2007.2. []a,c3. [4.5.6.a,c]a,c]a,c]a,c7. []a,c8. []a.c9. [pc10. Jacob Benesty, M. Mohan Sondhi, and Yiteng Huang (Eds.), Springer Handbook of SpeechProcessing,
- Springer, Berlin, 2008.11. 0. Cappe, "Elimination of the Musical Noise Phenomenon with the Ephraim and Malah NoiseSuppressor,"
IEEE Transactions of Speech and Audio Processing (April 1994): Vol. 2, 345-349.12. ASME, "ASME Steam Tables," Fifth Edition, 1983.13. []a,cWCAP-17548-NP August 2013Revision 2 7-214. Structural Integrity Associates Calculation
- Package, MONT- I1Q-303, Rev. 1, "Monticello MainSteam Strain Gage Data Reduction,"
January 21, 2009.15. Xcel Energy Design Information Transmittal, DIT 13638-10, "Extended Power UprateImplementation," June 24, 2011.WCAP-17548-NP August 2013Revision 2}}