ML17354A763

Submits Rept Re Changes to or Errors Discovered in ECCS Evaluation Models That Affect PCT Calculation & Effect on Limiting ECCS Analysis,Per 10CFR50.46

ML17354A763
Person / Time
Site:	Turkey Point
Issue date:	01/12/1998
From:	Hovey R FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-98-010, L-98-10, NUDOCS 9801220106
Download: ML17354A763 (9)

Text

I~'ATEGORY 1 REGULAT INFORMATION DXSTRIBUTIO YSTEM (RXDS)ACCESSION NBR:9801220106 DOC.DATE: 98/01/12 NOTARIZED:

NO DOCKET FACIL:50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 ,50-251 Turkey Point Plant, Unit 4, Florida Power and Light C 05000251 AUTH.LIAME'UTHOR AFFILIATION HOVEY,R.J.

Florida Power&Light Co.RECIP.NAME RECXPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Submits rept re changes to or errors discovered in ECCS evaluation models that affect PCT calculation"&.

effect on limiting ECCS analysis,per 10CFR50.46.

DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE: TITLE: OR Submittal:

General Distribution NOTES: RECIPIENT ID CODE/NAME PD2-3 LA CROTEAU,R COPIES RECIPIENT LTTR ENCL'D CODE/NAME 1 1 PD2-3 PD 1 1 COPIES LTTR ENCL 1 1 INTERNAL: CENTE 01 NRR/DE EMCB NRR/DSSA/SPLB NUDOCS-ABSTRACT EXTERNAL: NOAC 1'1 1 1 1 1 1 1 1 NRR/DE/ECGB/A NRR/DRCH/HICB NRR/DSSA/SRXB OGC/HDS3 NRC PDR 1.1 1 1 1 1 1 0 1 1 D 0 M~NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US'TO REDUCE WASTE.TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)ON EXTENSION 415-2083 TOTAL NUMBER OF.COPXES REQUIRED: LTTR 13 ENCL 12 C t i T ,~'I IÃK JAN 12 t998 L-98-010 10 CFR 550.46 U.S.Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.20555 Re: Turkey Point Units 3 and 4 Docket Nos.50-250 and 50-251 10 CFR 50.46,"Acceptance Criteria for Emergency Core Cooling Systems in Light Water 10 CFR 50.46(a)(3)(ii)requires that licensees report to the Commission within 30 days the nature of changes to, or errors discovered in, the Emergency Core Cooling System (ECCS)evaluation models, or in the application of such models that significantly affect the peak clad temperature calculation and their effect on the limiting ECCS analysis.On December 20, 1997, the NRC issued Amendment No.195 to Facility Operating License No.DPR-31 for Turkey Point Unit 3, and Amendment No.189 to Facility Operating License No.DPR-41 for Turkey Point Unit 4, approving application of the Westinghouse generic Best Estimate (BE)Large Break Loss of Coolant Accident (LOCA)analysis evaluation model for Turkey Point Units 3 and 4.This letter provides Florida Power and Light Company's update as a result of implementation of Amendments 195/189 for Turkey Point Units 3 and 4 and also fulfills the annual reporting requirement per 10 CFR 50.46(a)(3)(ii).The last annual'eport was submitted by FPL letter L-97-133 dated May 23, 1997.Should there be any questions, please contact us.Very truly yours, R.J.Hovey Vice President Turkey Point Plant OIH s~LOVE)A"~r attachment

))llilIllllIlllllllllIlllllllllllllllll an FPL Group company , cc: L.A.Reyes, Regional Administrator, Region II, USNRC T.P.Johnson, Senior Resident Inspector, USNRC,.-Turkey Point Plant 980i220iOb 980ii2 PDR ADOCX oa0002SO I P PDR Q

Attachment Page 1 of 3 L-98-010 By letter L-97-133, dated May 23, 1997, Florida Power and Light Company (FPL)reported a Peak Clad Temperature (PCT)of 1666 F for the worst case SBLOCA transient analysis.There are no changes to, or errors discovered in the ECCS SBLOCA evaluation models, or in the application of such models that affect the PCT since the last report documented by FPL letter L-97-133.By letter L-97-133, dated May 23, 1997, FPL reported a PCT of 2159'F for the worst case LBLOCA transient analysis.On December 20, 1997, the NRC issued Amendment 195 to Facility Operating License No.DPR-31 for Turkey Point Unit 3, and Amendment 189 to Facility Operating License No.DPR-41 for the Turkey Point Unit 4, approving application of the Westinghouse generic Best Estimate (BE)LBLOCA analysis evaluation model for Turkey Point Units 3 and 4.Based on the PCT reported in L-97-133 of 2159'F, the net change in PCT for the worst case LBLOCA is a 92'F decrease in PCT, for a total PCT of 2067'F.The peak clad temperature of 1666'F for the worst case SBLOCA and the revised PCT of 2067'F for the worst case LBLOCA, as summarized in Tables 1 and 2, are below the 10 CFR 50.46 Emergency Core Cooling System (ECCS)acceptance criteria limit of 2200'F.Turkey Point Units 3 and 4 remain in compliance with the ECCS performance criteria specified in 10 CFR 50.46 (b).

Attachment Page 2 of 3 L-98-010 TBBIZ~-TURKEY POINT UNITS 3 AND 4 PREDICTED PEAK CLAD TEMPERATURES CURRENT SBLOCA EVALUATIONS THAT HAVE ASSESSED PCT PENALTIES Analysis of Record Total SBLOCA PCT,specified in FPL Letter L-97-133 1688'F 4666'F None O'Total Estimated SBLOCA PCT 1666'F

Agtachment Page 3 of 3 L-98-010 MBL~TURKEY POINT UNITS 3 AND 4 PREDICTED PEAK CLAD TEMPERATURES CURRENT LBLOCA EVALUATIONS THAT HAVE ASSESSED PCT PENALTIES Total LBLOCA PCT specified in FPI letter L-97-133 2159'F BE LOCA methodology re-analysis Effect of Containment Purging Imprecision due to use of BELOCA MOD 7 and 7A 2040'F 27'F 0 F Total Estimated LBLOCA PCT 2067'F

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