ML12207A542
| ML12207A542 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 05/31/2012 |
| From: | Rowland A Westinghouse |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| L-MT-12-056, TAC MD9990 WCAP-17548-NP, Rev 0 | |
| Download: ML12207A542 (59) | |
Text
{{#Wiki_filter:L-MT-12-056 ENCLOSURE 9 WESTINGHOUSE REPORT, WCAP-17548-NP, REVISION 0 SIGNAL PROCESSING PERFORMED ON MONTICELLO MSL STRAIN GAGE AND RSD INSTRUMENTATION DATA 58 pages follow Westinghouse Non-Proprietary Class 3 WCAP-17548-NP May 2(Revision 0 Signal Processing Performed on Monticello MSL Strain Gauc and RSD Instrumentation Data Westinghouse )12 WESTINGHOUSE NON-PROPRIETARY CLASS 3 WCAP-17548-NP Revision 0 Signal Processing Performed on Monticello MSL Strain Gauge and RSD Instrumentation Data AnnMarie Rowland*Acoustic & Structural Analysis May 2012 Reviewer: Inessa E. Berman*Acoustic & Structural Analysis QA: Tyler W. Crumrnmy*Quality Operations -ES and Major Projects Approved: David R. Forsyth*, Manager Acoustic & Structural Analysis*Electronically approved records are authenticated in the electronic document management system.Westinghouse Electric Company LLC 1000 Westinghouse Drive Cranberry Township, PA 16066, USA© 2012 Westinghouse Electric Company LLC All Rights Reserved WCAP-17548-NP_4.docx-052512 TABLE OF CONTENTS LIST O F TAB LES ....................................................................................................................................... iii LIST O F FIGU RES ..................................................................................................................................... iv Executive Sum m ary ..................................................................................................................................... vi List of A cronym s and A bbreviations ....................................................................................................... vii Tradem ark N otes ......................................................................................................................................... vii 1 BA CK GRO UN D A N D IN TRO D U CTION .................................................................................. 1-1
1.1 BACKGROUND
OF ACOUSTIC ISSUES AND REQUIREMENTS ........................... 1-1 1.2 REPLA CEM EN T OF THE STEA M DRY ER ................................................................. 1-2 1.3 PURPO SE ........................................................................................................................ 1-3 2 SUM M A RY O F PREV IOU S W ORK .......................................................................................... 2-1 2.1 A CO U STIC SCREEN IN G .............................................................................................. 2-1'2.2 SU BSCA LE TESTIN G ................................................................................................... 2-1 ,2.3 PREV IO U S D ATA RECORD IN G S ................................................................................ 2-1 2.4 DERIVATION OF INSTRUMENTATION LOCATIONS .............................................. 2-2 3 DATA CO LLECTION AN D PRO CESSIN G PLAN .................................................................... 3-1 3.1 D ATA A CQ U ISITION AN D SIGN A L VA LID ITY ........................................................ 3-1 3.2 D ATA PRO CESSIN G O V ERV IEW ................................................................................ 3-3 3.3 STRAIN TO PRESSURE CONVERSION -MSL STRAIN GAUGE DATA ................ 3-4 3.4 N A RR O W BAN D FILTERIN G ...................................................................................... 3-5 3.5 PSD D ERIVATION ......................................................................................................... 3-6 3.6 EIC SU BTRA CTION ...................................................................................................... 3-6 3.7 W AV ELET D E-N O ISIN G ............................................................................................... 3-7 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS .................................................... 4-1 4.1 IN PU TS ........................................................................................................................... 4-1 4.2 A SSU M PTION S .............................................................................................................. 4-1 5 D ISCU SSION O F RESU LTS ....................................................................................................... 5-1 5.1 D ATA RECO RD IN G .................................................................................................. 5-1 5.2 STRA IN TO PRESSURE CON VERSION ..................................................................... 5-4 5.3 FILTERIN G ................................................................................................................... 5-10 5.4 EIC SUBTRACTION WITH DERIVED MSL PRESSURES ...................................... 5-13 5.5 W AVELET D E-N O ISIN G ............................................................................................. 5-15 6 CON CLU SION S .......................................................................................................................... 6-1 7 RE FEREN CES ............................................................................................................................. 7-1 WCAP- 17548-NP May 2012 Revision 0 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[ ]a,c ................................................................................................................. 2-3[ ]ac.................................. 3-1[ ]a ......................................................................................................... 3-2[a] ......................................................................................................... 3-2[......................................................................................................... 3 -2 Transducers and Units ...................................................................................................... 5-1 Dates and Tim es of Data Recording ................................................................................ 5-2[ ]3 ............................................................ 5-4[ ]ac .................... 5-5 Sum mary of Narrow Band Filters .................................................................................. 5-11 WCAP- 17548-NP May 2012 Revision 0 iv LIST OF FIGURES Figure 1-1 Schematic of Replacement Steam Dryer ................................................................................. 1-2 Figure 2-1 Schematic of MSL [ ]ab,c ......................................................... 2-2 Figure 2-2 Schematic of [ ]abc, .......................................................... 2-3 Figure 2-3 Schematic of [ ]ab,c ........................... 2-4 Figure 2-4 Schematic of [ ],,b~c ................ 2-4 Figure 2-5 Schematic of [b,c .............................. 2-5 Figure 2-6 [ ],,b.. ................................................... 2-5 Figure 2-7 Schematic of [ 2-6 Figure 3-1 Pipe Mode Diagram, N=[0,5] .................................................................................................. 3-4 Figure 5-1 Examples of Transients in Data ............................................................................................... 5-3 Figure 5-2 MSL [P ................................ 5-6 Figure 5-3 [ ........................................ 5-6 Figure 5-4 [ PC ................................... 5-7 Figure 5-5 [ PC ................................... 5-8 Figure 5-6 [ ]b~c .................................. 5-8 Figure 5-7 [ PC ................................... 5-9 Figure 5-8 [ bC ......... 5-12 Figure 5-9 [ PC .......................... 5-13 Figure 5-10 [ ]bPC ........................ 5-14 Figure 5-11 [ .................................................. 5-15 F igure 5-12 [ ]ac ................................................................ 5-16 Figure 5-13 Examples of Cleaned Plant Data Derived MSL Pressures, 100% CLTP ............................ 5-17 Figure 5-14 Comparison of Raw and Processed Data Derived MSL Pressures, 100% CLTP ................ 5-18 Figure 5-15 Attenuation of MSL Data Due to Processing ...................................................................... 5-19 Figure 5-16 Complete and Final Processed Data Derived MSL Pressures, 100% CLTP ....................... 5-20 Figure 5-17 ]b........................................ 5-21 Figure 5-18 [ ]b.C............... 5-21 Figure 5-19 [ ]b............. 5-22 Figure 5-20 [P ................ 5-23 WCAP- 17548-NP May 2012 Revision 0 V Figure 5-21 [Figure 5-22 [Figure 5-23 [Figure 5-24 [Figure 5-25 [Figure 5-26 [Figure 5-27 [Figure 5-28 [b,. ............................................... 5-23]b,. .......................................... 5-24]b,c ................ 5-25]b, ............. 5-26]bc ................ 5-26]b,. ............ 5-27]b,c ................ 5-27]bc ............................ 5-29 WCAP- I 7548-NP May 2012 Revision 0 vi Executive Summary Monticello Nuclear generating plant (MNGP, herein referred to as "Monticello") is implementing an extended power uprate (EPU) to increase plant power to [a2c II I a II Ia~c I I a~c I]a,c WCAP- 17548-NP May 2012 Revision 0 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 Notes VersaDAS is a registered trademark of Structural Integrity Associates WCAP- 17548-NP May 2012 Revision 0 1-1 1
1.1 BACKGROUND
AND INTRODUCTION BACKGROUND OF ACOUSTIC ISSUES AND REQUIREMENTS ]a,c NRC Regulatory Guide 1.20, Rev. 3 [1], contains requirements for demonstrating the structural integrity of the steam dryer at power levels higher than CLTP.a~c WCAP-17548-NP May 2012 WCAP-17548-NP May 2012 Revision 0 1-2 1.2 REPLACEMENT OF THE STEAM DRYER I]abc a,c Figure 1-1 Schematic of Replacement Steam Dryer I]apb,c I]a,b,c WCAP-17548-NP May 2012 Revision 0 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 benchnmarking 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 are contained in this document.Furthermore, specific datasets are shown and discussed in detail with regard to the signal processing performed. The intention of presenting this data is to demonstrate the effect, and support the use, of the signal processing described herein.WCAP-17548-NP May 2012 Revision 0 2-1 2 2.1
SUMMARY
OF PREVIOUS WORK ACOUSTIC SCREENING I]ab,c 2.2 SUBSCALE TESTING I I a~c II Table 2-1 Natural Frequency of [ ]b Natural Frequencies Predicted [3] [ I'C Plant [5]Side Branch Freq., Hz Difference Freq., Hz Difference Freq., Hz E I b 2.3[PREVIOUS DATA RECORDINGS ]ac WCAP- 17548-NP May 2012 Revision 0 2-2]aob,c]a,b,c 2.4 DERIVATION OF INSTRUMENTATION LOCATIONS[jac a,c Figure 2-1 Schematic of MSL [] a,b,c WCAP-17548-NP May 2012 Revision 0 2-3 II I ac Table 2-2 [8ac MSL Location Position a,b,c__ _ I.i I Sac I]ac a,b,c Figure 2-2 Schematic of [WCAP- 17548-NP May 2012 Revision 0 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 [1 a,b,c a,b,c Figure 2-4 Schematic of I ,a,b,c WCAP- 17548-NP May 2012 Revision 0 2-5 a,b,c Figure 2-5 Schematic of [I]a,b,c a,b,c Figure 2-6 [ja,b,c WCAP- 17548-NP May 2012 Revision 0 2-6 a,b,c Figure 2-7 Schematic of[]a,b,c I]ac WCAP-17548-NP May 2012 Revision 0 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 was applied to the full range of Monticello data in [5] and [8].3.1 DATA ACQUISITION AND SIGNAL VALIDITY]a,c II] a,c Table 3-1 1 ja,c a,c i WCAP- 17548-NP May 2012 Revision 0 3-2 II]a,c Table 3-2 11,C Table 3-3 Tbec Table 3-4 [Jatc a,c]ac 1a,c]a,c a,c F I I WCAP- 17548-NP May 2012 Revision 0 3-3 II]a,b,c I abc 3.2 DATA PROCESSING OVERVIEW I]a,b,c WCAP- 17548-NP May 2012 Revision 0 3-4 3.3 STRAIN TO PRESSURE CONVERSION -MSL STRAIN GAUGE DATA[]a,c I]a,c (3-1)where,[I I a~c]a,c]a,c a,c Figure 3-1 Pipe Mode Diagram, N=10,51 I WCAP- 17548-NP May 2012 WCAP- 17548-NP May 2012 Revision 0 3-5]a,ca (3-2)where,]ac]ac a]ac 3.4 NARROW BAND FILTERING ac]ac WCAP-17548-NP May 2012 Revision 0 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 Hanning window was used to reduce spectral leakage, and 50 percent overlap was used in order to increase the number of ensembles available for averaging. 3.6 EIC SUBTRACTION I a~c II P 0 (3-3)L a,c where,[[pc, pc I I ac Ij aC (3-4)where,[[I[I ac SaC WCAP-17548-NP May 2012 Revision 0 3-7 The PSI~s were derived using Welch's Modified Periodogram. method, as described in Section 3.5 a,c 3.7 WAVELET DE-NOISING pac I I a~c I]a,c I]C 1. [2. [3. []C]C[WCAP- 17548-NP May 2012 Revision 0 3-8]c II]C WCAP- 17548-NP May 2012 Revision 0 4-1 4 INPUTS TO SIGNAL PROCESSING AND ASSUMPTIONS 4.1 INPUTS]a,c 4a.c 4.2 ASSUMPTIONS II]C II]C The acoustic speed in steam is assumed to be 1600 ft/s [12].[I a~c II]a.c II]a,c II Ia,c WCAP- 17548-NP May 2012 Revision 0 5-1 5 5.1 DISCUSSION OF RESULTS DATA RECORDING I I ac Table 5-1 Transducers and Units Transducer Units K a,c i[]a,c I]ab,c WCAP- 17548-NP May 2012 Revision 0 5-2 Table 5-2 Dates and Times of Data Recording Recording CLTP Filename Date Time b[ac 1.) [WCAP-17548-NP May 2012 Revision 0 5-3]a.C 2.) [3.) ]]a,c la,c]8,C]a~C ac~a,c Figure 5-1 Examples of Transients in Data WCAP-17548-NP May 2012 Revision 0 5-4 Iaboc I a,b,c 5.2 STRAIN TO PRESSURE CONVERSION la,c I I ac Table 5-3 1 ]a'IC Channel MSL LOC 1 2 3 4 Mean b 4- 4 WCAP-17548-NP May 2012 Revision 0 5-5 Table 5-4 shows a summary of the removed channels for each of the MSL strain gauge files.Table 5-4 1 ja,c Recording % CLTP Date Stamp Time Selection Removed Channels b 4 + + +4 4 + +4 4 4 +4 i i i 4 4 4 -I-4 4 4 -t 4 4 4 i-[I c WCAP- 17548-NP May 2012 Revision 0 5-6 I a,b,c a,b,c I Figure 5-2 MSL [ia,b,c lb,e a,b,c Figure 5-3 [Ib,c WCAP- 17548-NP May 2012 Revision 0 5-7 la,b,c abbc]a,b,c a,b,c Figure 5-4 ]b,c abc ba,b,c WCAP- 17548-NP May 2012 Revision 0 5-8 a,b,c Figure 5-5 [,bc a,b,c Figure 5-6 [bc I] ab,c WCAP- 17548-NP May 2012 Revision 0 5-9 a,b,c Figure 5-7 [b,c II]ab,c WCAP-17548-NP May 2012 Revision 0 5-10 5.3 FILTERING r WCAP-17548-NP May 2012 Revision 0 5-11 Table 5-5 Summary of Narrow Band Filters% Date Stamp Mean Electric Electric x 3 Vane Passing CLTP ate Filtering iabc WCAP-17548-NP May 2012 Revision 0 5-12 b Figure 5-8 1 ib,c I WCAP- I 7548-NP May 2012 WCAP- 17548-NP May 2012 Revision 0 5-13 5.4 EIC SUBTRACTION WITH DERIVED MSL PRESSURES I]abc b Figure 5-9 1 Ib,c I]ab c WCAP-17548-NP May 2012 Revision 0 5-14 I]a,c a,b,c Figure 5-10 [ib,c WCAP- 17548-NP May 2012 Revision 0 5-15 5.5 WAVELET DE-NOISING [Figure 5-11]a,b,c[a,b,e L]ab,c C IC I C (5-1)where, II[I[I II] 0] C oC]c I]ab,c WCAP- 17548-NP May 2012 Revision 0 5-16 a,b,c Figure 5-12 [I ,C I abc I WCAP- 17548-NP May 2012 Revision 0 5-17 Ic a,b,c Figure 5-13 Examples of Cleaned Plant Data Derived MSL Pressures, 100% CLTP WCAP-17548-NP May 2012 Revision 0 5-18 II]C a,b,c Figure 5-14 Comparison of Raw and Processed Data Derived MSL Pressures, 100% CLTP WCAP- 17548-NP May 2012 Revision 0 5-19 a,b,c Figure 5-15 Attenuation of MSL Data Due to Processing a,b,c a,b,c WCAP-17548-NP May 2012 Revision 0 5-20 a,b,c Figure 5-16 Complete and Final Processed Data Derived MSL Pressures, 100% CLTP WCAP- 17548-NP May 2012 Revision 0 5-21 II oC a,b,c Figure 5-17]a,b,c b,c I a,b,c Figure 5-18 [ib,c I WCAP-17548-NP May 2012 Revision 0 5-22]a,b,c II a,b,c Figure 5-19 []b,c WCAP- 17548-NP May 2012 Revision 0 5-23 a,b,c Figure 5-20 Figure 5-21 [b,c a,b,c b,c WCAP- 17548-NP May 2012 Revision 0 5-24[b[Figure 5-21]c a,b,c Figure 5-22 1 ]b,c]bc WCAP- 17548-NP May 2012 Revision 0 5-25 I a,b,c Figure 5-23 [, b,c WCAP- 17548-NP May 2012 Revision 0 5-26 a,b,c Figure 5-24 [Figure 5-25 1 b,c a,b,c Ib,c WCAP-17548-NP May 2012 Revision 0 5-27 a,b,c Figure 5-26 [Figure 5-27 [Ib,c a,b,c bc WCAP- 17548-NP May 2012 Revision 0 5-28]C a,b,c WCAP-17548-NP May 2012 Revision 0 5-29 a,b,c Figure 5-28 [jb,c WCAP- 17548-NP May 2012 Revision 0 6-1 6 CONCLUSIONS ia,b,c The processing steps that define this methodology and that are described in this document can be summarized as follows: 1.) ]ac 2.) [a,c 3.) [4.) [5.) II PaC I a~c I 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,b,c WCAP- I 7548-NP May 2012 WCAP- 17548-NP May 2012 Revision 0 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. [ac 3.I a~c 4.5.pac 6. Structural Integrity Associates Calculation Package, MONT-I Q-302, Rev. 0, "Monticello Main Steam Line Strain Gage Data Reduction," June 27, 2007.7. [ac 8. 1 la,c 9. Jacob Benesty, M. Mohan Sondhi, and Yiteng Huang (Eds.), Springer Handbook of Speech Processing, Springer, Berlin, 2008.10. 0. Cappe, "Elimination of the Musical Noise Phenomenon with the Ephraim and Malah Noise Suppressor," IEEE Transactions of Speech andAudio Processing (April 1994): Vol. 2, 345-349.11. M. C. E Rosas-Orea, M. Hemandez-Diaz, V. Alarcon-Aquino, and L. G. Guerrero-Ojeda, "A Comparative Simulation Study of Wavelet Based Denoising Algorithms," Proceedings of the 15"h International Conference on Electronics, Communications, and Computers, 0-7695-2283-1/05, IEEE, 2005.12. ASME, "ASME Steam Tables," Fifth Edition, 1983.WCAP- 17548-NP May 2012 Revision 0 7-2 13.14.15.16.17.18.]a~c Structural Integrity Associates Calculation Package, MONT-11Q-303, Rev. 1, "Monticello Main Steam Strain Gage Data Reduction," January 21, 2009.Xcel Energy Design Information Transmittal, DIT- 13638-10, "Extended Power Uprate Implementation," June 24, 2011.X. GaoRobert, and Ruqiang Yan, Wavelets:
Theory and Applications for Manufacturing, Springer, New York, 2010.Charles M. Stein, "Estimation of the Mean of a Multivariate Normal Distribution," The Annals of Statistics (November 1981): Vol. 9, No. 6, 1135-1151. David L. Donoho, "De-Noising by Soft-Thresholding," IEEE Transactions on Information Theory (May 1995): Vol. 41, No. 3.WCAP- 17548-NP May 2012 Revision 0}}