ML17354B224

Forwards Annual 10CFR50.46 Rept Re Changes To,Or Errors Discovered in ECCS Evaluation Models,Or in Application of Such Models That Effect Peak Clad Temp Calculation

ML17354B224
Person / Time
Site:	Turkey Point
Issue date:	01/06/1999
From:	Hovey R FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-99-002, L-99-2, NUDOCS 9901130012
Download: ML17354B224 (7)

Text

CATEGORY 1 REGULATO Y INFORMATION DISTRIBUTIO SYSTEM (RIDS)

ACCESSION NBR:9901130012 DOC.DATE: 99/01/06 NOTARIZED: NO DOCKET FACIL:50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250

$ 0-251 Turkey Point Plant, Unit 4, Florida Power and Light C 05000251 AUTH.NAME AUTHOR AFFILIATION HOVEYL,R.J. Florida Power S Light Co.

RECIP.NAME RECIPIENT AFFILIATION Records Management Branch (Document Control Desk)

SUBJECT:

Forwards annual 10CFR50.46 rept re changes to,or errors discovered in ECCS evaluation models, or in application of such models that effect peak clad temp calculation. A DISTRIBUTXON CODE: A001D COPIES RECEIVED:LTR i ENCL ( SIZE:

TITLE: OR Submittal: General Distribution NOTES:

RECXPIENT COPIES RECIPXENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-3 LA 1 1 PD2-3 PD 1 1 JABBOUR,K 1 1 INTERNA 'ELE C NTE~~O 1 1 NRR/DE/ECGB/A 1 1 NRR/DE/EMCB 1 1 NRR/DRCH/HICB 1 1 NRR/DSSA/SPLB 1 1 NRR/DSSA/SRXB 1 1 NRR/SPSB JUNG,I 1 1 NUDOCS-ABSTRACT 1 1 OGC/HDS3 1 0 EXTERNAL: NOAC 1 1 NRC PDR 1 . 1 D

NOTE TO ALL "RZDS" 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 COPIES REQUIRED: LTTR 14 ENCL 13

J 0 N O 6 1999 L-99-002 10 CFR 550.46 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. CD 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 P w A 10 CFR 50. 46 (a) (3) (ii) requires that licensees report to the Commission at least annually 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 affect the peak clad temperature calculation and their effect on the limiting ECCS analysis. This letter provides Florida Power and Light Company's report for Turkey Point Units 3 and 4 since the last report submitted by FPL letter L-98-010, dated January 12, 1998.

Should there be any questions, please contact us.

Very truly yours, 9L R. J. Hovey Vice President Turkey Point Plant OIH attachment cc: L. A. Reyes, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant 99'0l%300i2 990'f06 PDR ADOCK 05000250 P , PDR an FPL Group company

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Attachment L-99-002 Page 1 of 3 B L A B By letter L-98-010, dated Janaury 12, 1998, 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-98-010.

L B By letter L-98-010, dated January 12, 1998, FPL reported a PCT of 2067'F for the worst case LBLOCA transient analysis. Since the last report, ZIRLO fuel rod cladding was implemented in order to gain margj.n to the fuel corrosion design limits. As a result of the ZIRLO fuel rod cladding, a 22'F penalty on the PCT has been reported. Based on the PCT reported in L-98-010 of 2067'F, the net change in PCT for the worst case LBLOCA is 22'F, for a total PCT of 2089'F.

The peak clad temperature of 1666'F for the worst case SBLOCA and the revised peak clad temperature of 2089'F for the worst case LBLOCA, correcting for the effects discussed above and summarized in Tables 1 and 2, are below the 10 CFR 50.46 ECCS acceptance criteria limit of 2200'F. Turkey Point Units 3 and 4 remain in compliance with the Emergency Core Cooling System performance criteria specified in 10 CFR 50.46 (b).

Attachment L-99-002

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TURKEY POINT UNITS 3 AND 4 PREDICTED PEAK CLAD TEMPERATURES CURRENT SBLOCA EVALUATIONS THAT HAVE ASSESSED PCT PENALTIES Analysis of Record 1688 F Total SBLOCA PCT specified in FPL Letter L-98-010 1666 F Ev in FP None Total Estimated SBLOCA PCT 1666'F

Attachment L-99-002 Page 3 of 3 Q~BLg 2 TURKEY POINT UNITS 3 AND 4 PREDICTED PEAK CLAD TEMPERATURES CURRENT LBLOCA EVALUATIONS THAT HAVE ASSESSED PCT PENALTIES Analysis of Record 2040'F Total LBLOCA PCT specified in FPL letter L-98-010 2067 F v 1 ZIRLO Cladding 22 F Total Estimated LBLOCA PCT 2089'F

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