Text

WCAP-17251-NP, Revision 2 - Monticello Replacement Steam Dryer Four-Line Acoustic Subscale Testing Report, Enclosure 11
	ML13248A345
Person / Time
Site:	Monticello
Issue date:	08/29/2013
From:	Berman I E; Westinghouse
To:	; Office of Nuclear Reactor Regulation
References
	L-MT-13-091, TAC MD9990 WCAP-17251-NP, Rev 2
	Download: ML13248A345 (67)
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L-MT-13-091ENCLOSURE 11WESTINGHOUSE WCAP-17251-NP, (NONPROPRIETARY) REVISION 2MONTICELLO REPLACEMENT STEAM DRYER FOUR-LINE ACOUSTICSUBSCALE TESTING REPORT66 pages follow Westinghouse Non-Proprietary Class 3WCAP-17251-NP AucRevision 2Monticello ReplacementSteam Dryer Four-LineAcoustic SubscaleTesting ReportWestinghousejust 2013 WESTINGHOUSE NON-PROPRIETARY CLASS 3WCAP-17251-NPRevision 2Monticello Replacement Steam Dryer Four-Line AcousticSubscaleTesting ReportInessa E. Berman*U.S. BWR EngineeringAugust 2013Reviewer: AnnMarie Rowland*U.S. BWR EngineeringApproved: Daniel T. McLaughlin*, Resource ManagerU.S. BWR Engineering*Electronically approved records are authenticated in the electronic document management system.Westinghouse Electric Company LLC1000 Westinghouse DriveCranberry Township, PA 16066© 2013 Westinghouse Electric Company LLCAll Rights Reserved iiRECORD OF REVISIONSRevision Description Completed0 Original issue 06/15/10The goal of the Rev. 0 report was to analyze the effect of the new dryer geometry on 03/03/13the acoustic signature and to develop the scaling spectra based on the plant data takenat CLTP with the OEM dryer.The goal of the Rev. I report was to derive the scaling spectra to predict EPU acousticsignature based on the CLTP plant data with the RSD dryer. The updated documenteliminates sections that compared the two different dryer geometries and provides anin-depth review of the RSD subscale data analysis.2 The scaling spectra in Rev I version were calculated based on dynamic pressure See EDMSscaling which is a function of the velocity squared. The scaling spectra calculatedbased on the subscale testing are included in Rev 2 version.All of the figures were updated to reflect the 15 percent increase based on the massflow rate increase, instead of power increase.The change bars were not included.WCAP-1725 1-NP August 2013WCAP- 17251-NPAugust 2013Revision 2 iiiTABLE OF CONTENTSR E C O R D O F RE V ISIO N S .......................................................................................................................... iiL IS T O F T A B L E S ....................................................................................................................................... ivL IST O F F IG U R E S ...................................................................................................................................... vEX EC U TIV E SU M M A RY ......................................................................................................................... viiACRONYMS, ABBREVIATIONS, AND TRADEMARKS ..................................................................... viiiT RA D E M A R K S ........................................................................................................................................ viii1 BACKGROUND AND PURPOSE ......................................................................................... 1-12 IN PU T S TO T E ST IN G ................................................................................................................. 2-12.1 PLANT OPERATING CONDITIONS ............................................................................ 2-12.2 PRE-TEST PREDICTIONS AND ASSUMPTIONS ...................................................... 2-13 TESTING METHODOLOGY ...................................................................................................... 3-13.1 SUBSCALE TEST SYSTEM .......................................................................................... 3-13.2 PROCEDURAL OVERVIEW ......................................................................................... 3-33.3 INSTRUMENTATION AND DATA ACQUISITION ..................................................... 3-43.4 PRODUCTION TESTING .............................................................................................. 3-44 DATA PROCESSING METHODOLOGY ............................................................................... 4-14.1 DATA FILTERING AND SELECTION ...................................................................... 4-14.2 COMPUTATION OF THE MACH NUMBER ............................................................... 4-14.3 FREQUENCY SCALING ............................................................................................... 4-24.4 COMPUTATION OF THE SIDE BRANCH NATURAL FREQUENCY ....................... 4-24.5 COMPUTATION OF THE POWER SPECTRAL DENSITIES ..................................... 4-34.6 COMPUTATION OF THE RMS PRESSURES .............................................................. 4-34.7 COMPUTATION OF THE SCALING SPECTRA .......................................................... 4-45 DESCRIPTION OF RESULTS .................................................................................................... 5-15.1 R A W D A TA ..................................................................................................................... 5-15 .2 T E S T L O G ....................................................................................................................... 5-35.3 MACH NUMBER COMPARISONS .............................................................................. 5-55.4 NATURAL FREQUENCY CALCULATIONS ............................................................... 5-65.5 ASSESSMENT OF THE MSL ACOUSTIC SIGNATURES .......................................... 5-65.6 RMS PRESSURE TRENDS .......................................................................................... 5-105.7 EFFECT OF THE DRYER GEOMETRY ..................................................................... 5-116 CLTP TO EPU SCALING SPECTRA .......................................................................................... 6-17 C O N C L U S IO N S .......................................................................................................................... 7-18 RE FE R EN C E S ............................................................................................................................. 8-1APPENDIX A REPEATABILITY OF TEST DATA FOR OEM DRYER ........................................ A-1APPENDIX B REPEATABILITY OF TEST DATA FOR REPLACEMENT DRYER ...................... B-1WCAP- 17251 -NP August 2013Revision 2 ivLIST OF TABLESTable 2-1Table 2-2Table 3-1Table 4-1Table 5-1Table 5-2Table 5-3IIII]a,b .............................................................................. 2-1ab ....................................................... 2-1.................................................................................. 3-4]a.b ....................................................... 4-3a.. b .............................................................. 5-3a,,b.. ................ .................. 5-4]b. b ................ ........... 5-6WCAP-17251-NPAugust 2013Revision 2 VLIST OF FIGURESFigure 3-1 []a ............................................... 3-1Figure 3-2 ]a .......................................................................................... 3-2Figure 3-3 M ockup of the M onticello OEM Dryer ......................................................................... 3-2Figure 3-4 M ockup of the M onticello Replacement Steam Dryer .................................................. 3-3Figure 5-1 [ ]a,b .............................. 5-1Figure 5-2]a.b .............................................................................................. 5 -2Figure 5-3 [b .................................................................... 5-5Figure 5-4 []a ................................................... 5-7Figure 5-5 [] ................................................... 5-7Figure 5-6 [] .................................................... 5-8Figure 5-7 [] .................................................... 5-8Figure 5-8 [.]a ...................................................................... 5-9Figure 5-9 [b .............................................................. 5-10Figure 5-10 ]a ...............................................[ 5-11Figure 5-11 ] ...............................................[ 5-12Figure 5-12 []a ............................................... 5-13Figure 5-13 []a ............................................... 5-14Figure 6-1 [.]a ...................................................................... 6-1Figure 6-2 [.]a ...................................................................... 6-2Figure 6-3 [.]a ...................................................................... 6-2Figure 6-4 [.]a ...................................................................... 6-3Figure A-1 [ b ........................................................................................... A-1Figure A-2 [b ........................................................................................... A-2Figure A-3 [a,b ........................................................................................... A-3Figure A-4 [b ........................................................................................... A-4Figure A-5 [ ]b .......................................................................................... A-5Figure A-6 [ ]a,b ........................................................................................... A-6Figure A-7 [ ]a.b ........................................................................................... A-7Figure A-8 ],b ........................................................................................... A-8WCAP-17251 -NP August 2013Revision 2 viFigure A-9Figure B-IFigure B-2Figure B-3Figure B-4Figure B-5Figure B-6Figure B-7Figure B-8Figure B-9Figure B-10Figure B- 1IFigure B-12Figure B- 13Figure B-14Figure B- 15Figure B- 16Figure B- 17Figure B-18a,b ........................................................................................... A -9]a,b ......................................................................................... B -1.a,b ........................................................................................... B -2]a b .......................................................................................... B -3]a,b ........................................................................................... B -4]a,b ......................................................................................... B -5]iab .......................................................................................... B -6.b ........................................................................................... B -7]a,b ........................................................................................... B -8]a,b ........................................................................................... B -9]a~b ........................................................................................ B -10]a,b ......................................................................................... B -11]ab ......................................................................................... B -I2]ab ......................................................................................... B -13]a,b ......................................................................................... B -14]a,b ......................................................................................... B -15b ......................................................................................... B -16] b ......................................................................................... B -17]a,b ......................................................................................... B -18WCAP-17251-NPAugust 2013Revision 2 viiEXECUTIVE SUMMARY]aThe main purpose of the test program was to]abThe second purpose of this testing program wasThe third purpose of this testing program was]aab]a,bWCAP-1 7251 -NP August 2013WCAP-17251-NPAugust 2013Revision 2 viiiACRONYMS, ABBREVIATIONS, AND TRADEMARKSAcronyms and AbbreviationsA/D analog/digitalCLTP current licensed thermal powerDAS data acquisition systemDS downstream (used only in figures and tables)EPU extended power uprateMSL main steam lineNRC Nuclear Regulatory CommissionOEM original equipment manufacturerPSD power spectral densityPVC polyvinyl chlorideRMS root mean squareRPV reactor pressure vesselRSD replacement steam dryerSRV safety relief valveUS upstream (used only in figures and tables)CDI Continuum Dynamics, IncTRADEMARKSDaqBook/2020, DASYLab, eMachines, MATLAB, Microsoft, and Windows are trademarks or registeredtrademarks of their respective owners. Other names may be trademarks of their respective owners.WCAP- 17251-NPAugust 2013Revision 2 1-11 BACKGROUND AND PURPOSEMonticello contracted Westinghouse in support of licensing for EPU. []a.CIn order to uprate the plant power, the United States Nuclear Regulatory Commission (NRC) requires thatthe structural integrity of the steam dryer be evaluated with regard to possible acoustic pressure loads.[This requirement is detailed in Reference 1. In order to evaluate the structural integrity of the steam dryer,]aIn summer 2009, a four-line subscale model test was performed through a range of Mach numbersencompassing all planned operating conditions. The main purpose of the four-line subscale model testing]aThe subscale test data were evaluated to establish whether or not the plant is operating in an acousticallybenign region through the range of planned operating conditions.]b,d]bedThe results presented in this report are based on testing performed in accordance with the test planWCAP- 17251 -NPAugust 2013Revision 2 2-12 INPUTS TO TESTING2.1 PLANT OPERATING CONDITIONS]abTable 2-1 [],br--KI a,b2.2 PRE-TEST PREDICTIONS AND ASSUMPTIONS]abKa,bIabWCAP-17251 -NPAugust 2013Revision 2 3-I33.1TESTING METHODOLOGYSUBSCALE TEST SYSTEMI]a]aThe geometry of the subscale system is explicitly described in Reference 2.[Figure 3-1 1,aWCAP- 17251-NPAugust 2013Revision 2 3-2aFigure 3-2 [ IaFigure 3-3 Mockup of the Monticello OEM DryeraWCAP- 1725 I-NPAugust 2013Revision 2 3-3maFigure 3-4 Mockup of the Monticello Replacement Steam Dryer3.2 PROCEDURAL OVERVIEWThe testing procedure is documented in Reference 2.[]I]a[] aWCAP-17251-NPAugust 2013Revision 2 3-4]a3.3 INSTRUMENTATION AND DATA ACQUISITIONThe instrumentation used in the test is summarized in Table 3-1.Table 3-1 ]anKa.,bIIa3.4 PRODUCTION TESTING[]WCAP-17251-NPAugust 2013Revision 2 4-144.1DATA PROCESSING METHODOLOGYDATA FILTERING AND SELECTIONI]aa4.2 COMPUTATION OF THE MACH NUMBERII]aThe computation of the Mach number was performed with Equation (4-1).[awhere,(4-1)aThe acoustic speed in air is a function of temperature. The computation of the acoustic speed is shown inEquation (4-2).WCAP-17251 -NPAugust 2013Revision 2 4-2ca,, = ýy-

R* T(4-2)where,Cair7RTis the acoustic speed in air.is the ratio of specific heats (1.4 for air).is the universal gas constant (1718 2 for air).s

Rankineis the absolute temperature in Rankine.4.3 FREQUENCY SCALING[I] a(4-3)a,bwhere,Ia.b4.4The [COMPUTATION OF THE SIDE BRANCH NATURAL FREQUENCY]a"C natural frequency was derived []a,cII a,cWCAP- 17251 -NPAugust 2013Revision 2 4-3a,bIa,c4.5 COMPUTATION OF THE POWER SPECTRAL DENSITIESThe PSDs were derived using Welch's modified periodogram method. Averaging was used, and thenumber of points for each ensemble was selected to yield a frequency resolution of 1 Hz (fall scale).A Hanning window was used to reduce spectral leakage, and 50 percent overlap was used to increase thenumber of averages.4.6 COMPUTATION OF THE RMS PRESSURESThe computation of the RMS pressures is shown in Equation (4-4).LI a(4-4)where,LaIII]aWCAP-1725 1-NP August 2013WCAP-17251-NPAugust 2013Revision 2 4-44.7 COMPUTATION OF THE SCALING SPECTRA[]a This is shown in Equation (4-5).La(4-5)where,[]WCAP-17251 -NPAugust 2013Revision 2 4-5a(4-6)where,aWCAP-17251-NP August 2013Revision 2 5-155.1[DESCRIPTION OF RESULTSRAW DATAFigure 5-1]3a~ba,brabWCAP-17251-NPAugust 2013Revision 2 5-2II]aba,bFigure 5-21a,bWCAP-17251 -NPAugust 2013Revision 2 5-35.2 TEST LOGI ]ab11 Table 5-1IlabI a,bWCAP- 17251-NPAugust 2013Revision 2 5-4[a.b11 Table 5-2IWCAP-17251-NPAugust 2013Revision 2 5-55.3 MACH NUMBER COMPARISONSIlabFigure 5-3 1WCAP-17251-NPAugust 2013Revision 2 5.4 NATURAL FREQUENCY CALCULATIONS 5-6]a.b11 Table 5-3Iaba,b5.5 ASSESSMENT OF THE MSL ACOUSTIC SIGNATURESI] aI]a~bI]alaI] aWCAP-17251 -NPAugust 2013Revision 2 5-7[bFigure 5-4Figure 5-5 [Ib]aWCAP-17251-NPAugust 2013Revision 2 5-8bFigure 5-6 [labFigure 5-7 [aWCAP- 17251-NPAugust 2013Revision 2 5-9]a,bbFigure 5-8WCAP-17251-NPAugust 2013Revision 2 5-105.6 RMS PRESSURE TRENDSI]a~ba,bFigure 5-9 [rabWCAP- 17251 -NPAugust 2013Revision 2 5-11Ib5.7 EFFECT OF THE DRYER GEOMETRYI]a~b-I a,bFigure 5-10 1]aWCAP- 17251 -NP August 2013WCAP- 17251-NPAugust 2013Revision 2 5-12a,bFigure 5-11 [JlaWCAP- 1725 1-NPAugust 2013Revision 2 5-13a,bFigure 5-12 [IaWCAP-17251 -NPAugust 2013Revision 2 5-14atbFigure 5-13 1]aWCAP-17251-NPAugust 2013Revision 2 6-16 CLTP TO EPU SCALING SPECTRAI]a.cIla,ca,cFigure 6-1 [aWCAP- 17251 -NPAugust 2013Revision 2 6-2a,cFigure 6-2 [Figure 6-3 [I aa,cIaWCAP-17251-NPAugust 2013Revision 2 6-3a,cFigure 6-4 [aWCAP- 17251 -NPAugust 2013Revision 2 7-17 CONCLUSIONS]abia,bWCAP-17251-NPAugust 2013Revision 2 8-18 REFERENCES1. Regulatory Guide 1.20, Rev. 3, "Comprehensive Vibration Assessment Program for ReactorInternals During Preoperational and Initial Startup Testing," U.S. Nuclear RegulatoryCommission, March 2007.2.]a,c3. ASME, "ASME Steam Tables," Fifth Edition, 1983.WCAP-1725 1-NPAugust 2013Revision 2 A-1APPENDIX AREPEATABILITY OF TEST DATAFOR OEM DRYERa,bFigure A-1 []a,bWCAP- 17251 -NPAugust 2013Revision 2 A-2a,bFigure A-2 [ ]a,bWCAP-1725 1-NP August 2013Revision 2 A-3a,bFigure A-3 [ ]a,bWCAP- 17251 -NPAugust 2013Revision 2 A-4a,bFigure A-4 [ ]a,bWCAP-17251-NPAugust 2013Revision 2 A-5a,bFigure A-5 Ila.bWCAP-1725 1-NPAugust 2013Revision 2 A-6a,bFigure A-6 [la,bWCAP- 1725 1-NPAugust 2013Revision 2 A-7a,bFigure A-7 [ ]a,bWCAP-1725 1-NPAugust 2013Revision 2 A-8a,bFigure A-8 [ ]abWCAP-17251-NPAugust 2013Revision 2 A-9a,bFigure A-9 [ ]a,bWCAP-17251 -NPAugust 2013Revision 2 B-1APPENDIX BREPEATABILITY OF TEST DATAFOR REPLACEMENT DRYERa,bFigure B-1 [ja.bWCAP- 17251-NPAugust 2013Revision 2 B-2a,bFigure B-2 [la,bWCAP- 17251-NPAugust 2013Revision 2 B-3a,bFigure B-3 [WCAP-1725 I-NPAugust 2013Revision 2 B-4a,bFigure B-4 [rabWCAP-17251 -NPAugust 2013Revision 2 B-5a,bFigure B-5 [ ja,bWCAP-1725 I-NPAugust 2013Revision 2 B-6a,bFigure B-6 IlabWCAP-17251 -NPAugust 2013Revision 2 B-7a.bFigure B-7 [ ]a,bAugust 2013Revision 2WCAP-17251-NP B-8a,bFigure B-8 [ ]a,bWCAP-17251-NPAugust 2013Revision 2 B-9a,bFigure B-9 [l a.bWCAP- 17251 -NPAugust 2013Revision 2 B- 10a,bFigure B-1O [IabWCAP-17251 -NPAugust 2013Revision 2 B-11a,bFigure B-11 [rabWCAP-17251 -NPAugust 2013Revision 2 B-12a,bFigure B-12 [a,bWCAP-17251 -NPAugust 2013Revision 2 B- 13a,bFigure B-13 [a,bWCAP- 17251-NPAugust 2013Revision 2 B- 14a,bFigure B-14 [a,bWCAP-17251 -NPAugust 2013Revision 2 B- 15a,bFigure B-15 [I a,bWCAP- 17251-NPAugust 2013Revision 2 B-16a,bFigure B-16 [labWCAP-17251-NPAugust 2013Revision 2 B-17a,bFigure B-17 [ ]a,bWCAP-17251-NPAugust 2013Revision 2 B- 18a,bFigure B-18 [a,bWCAP-1725 1-NPAugust 2013Revision 2

v t e Letter Sequence Other
TAC:MD9990, Clarify Application of Setpoint Methodology for LSSS Functions (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request Acceptance, Acceptance Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement Administration Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance Meeting, Meeting, Meeting, Meeting, Meeting, Meeting Questions 16 December 2008 11 February 2009 11 March 2009 12 March 2009 18 March 2009 18 March 2009 19 March 2009 20 March 2009 23 March 2009 29 March 2009 28 March 2009 28 March 2009 6 April 2009 6 April 2009 29 April 2009 26 June 2009 2 July 2009 2 July 2009 14 July 2009 14 July 2009 5 November 2009 16 March 2011 12 September 2011 4 October 2012 8 November 2012 28 March 2013 17 May 2013 9 July 2013 26 November 2013 18 December 2008 18 December 2008 19 March 2009 25 October 2009 15 February 2013 12 March 2013 10 May 2013 24 April 2013 Answers 25 January 2010 28 September 2010 13 January 2012 21 December 2012 7 March 2013 18 March 2013 21 March 2013 10 April 2013 18 July 2013 18 July 2013 2 August 2013 18 May 2016 19 July 2012 31 January 2013 29 March 2013 10 April 2013 Results Approval, Approval, Approval, Approval, Approval, Approval Other: L-MT-08-091, Calculation 0801040.301, Steam Dryer Outer Hood Submodel Analysis., L-MT-09-002, Response to NRC Probabilistic Risk Assessment (PRA) Branch Requests for Additional Information (Rais) Dated December 5, 2008, L-MT-09-003, Response to NRC Environmental Branch Requests for Additional Information (Rais) Dated December 18, 2008, L-MT-09-004, Enclosure 1 (Continued) to L-MT-09-004, NSPM Response to Containment & Ventilation Branch RAI Number 2, Copy of MNGP Appr T0406 Data Transmittal Pages 1 of 538 Through Pages 538 of 538, L-MT-09-026, Calculation 0000-0081-6958 MNGP-PRNMS-APRM Calc-2008-NP, Rev. 1, Average Power Range Monitor Selected Prnm Licensing Setpoints - EPU Operation (Numac), L-MT-09-027, Extended Power Uprate: Response to Instrumentation and Controls Branch RAI No. 3 Dated April 6, 2009, L-MT-09-044, Extended Power Uprate: Response to NRC Mechanical and Civil Engineering Review Branch (Emcb) Requests for Additional Information (Rais) Dated March 28, 2009, L-MT-09-049, Drawing C.5-2007, Revision 15, Failure to Scram, L-MT-09-073, Extended Power Uprate: Response to NRC Containment and Ventilation Review Branch (Scvb) Requests for Additional Information (Rais) Dated July 2, 2009 and July 14, 2009, L-MT-09-083, Extended Power Uprate: Limit Curves Requested by the Mechanical and Civil Review Branch (Emcb) Associated with Requests for Additional Information (Rais) Dated March 20, 2009, L-MT-09-088, Extended Power Uprate: Revision to Clarify Text in Enclosures 5 and 7 of L-MT-08-052, L-MT-09-097, Extended Power Uprate: Acknowledgement of NRC Review Delay, L-MT-10-025, Extended Power Uprate (Epu): Response to NRC-NSPM February 25, 2010 Conference Call, L-MT-10-072, Extended Power Uprate: Updates to Docketed Information, L-MT-11-044, Uprate (Epu): Update on EPU Commitments, L-MT-12-056, WCAP-17549-NP, Rev. 0, Monticello Replacement Steam Dryer Structural Evaluation for High-Cycle Acoustic Loads Using ACE, L-MT-12-090, Westinghouse, LTR-A&SA-12-8, Rev. 1, Attachment B, Recommendations for Inspections of the Monticello Replacement Steam Dryer., L-MT-12-114, Drawing C.5-2007, Rev. 17, Failure to Scram, L-MT-13-020, Enclosure 1 - Responses to the Gap Analysis, L-MT-13-029, Enclosure 14 to L-MT-13-029 - WCAP-17716-NP, Revision 0, Benchmarking of the Acoustic Circuit Enhanced Revision 2.0 for the Monticello Steam Dryer Replacement Project., L-MT-13-091, WCAP-17716-NP, Revision 1 - Benchmarking of the Acoustic Circuit Enhanced Revision 2.0 for the Monticello Steam Dryer Replacement Project, Enclosure 14, L-MT-13-092, Extended Power Uprate (Epu): Completion of EPU Commitments, Proposed License Conditions and Revised Power Ascension Test Plan, L-MT-13-096, GE-MNGP-AEP-3304R1, Enclosure 4, NEDC-33435 Corrected Pages, L-MT-13-126, Enclosure 3, GE-MNGP-AEP-3306, Enclosure 2 GEH Response to Mella+ Eicb RAI and Affidavit, L-MT-14-023, Maximum Extended Load Line Limit Analysis Plus: Technical Specification Clarifications, L-MT-15-074, Enclosure 7, WCAP-18604-NP, Revision 0, Monticello EPU Main Steam Line Strain Data Evaluation Report., L-MT-16-017, Revised Commitment to Reconcile Analysis of Bypass Voiding for Transition to Areva Analysis Methodology, L-MT-16-071, Submittal of 2016 Annual Report of Changes in Emergency Core Cooling System Evaluation Models Pursuant to 10 CFR 50.46, ML083230111, ML083400402, ML083500575, ML083570610, ML083590127, ML090710680, ML090710683, ML090710684, ML091120578, ML091140470, ML091410121, ML091410122, ML091410123, ML091410124, ML091760769, ML092290250, ML092810554, ML093160816, ML093220925, ML093220964, ML093620024, ML100280558... further results
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