L-2008-122, CFR 50.46, Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors - 2007 Annual Report

CFR 50.46, Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors - 2007 Annual Report

ML081680052
Person / Time
Site:	Turkey Point
Issue date:	05/28/2008
From:	Jefferson W Florida Power & Light Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
L-2008-122
Download: ML081680052 (3)

Text

FPL May 28, 2008 L-2008-122 10 CFR 50.46 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 Nuclear Power Reactors" - 2007 Annual Report

References:

1. Letter from W. Jefferson, Jr. to US NRC, "Turkey Point Units 3 and 4, Dockets Nos. 50-250 and 50-251, 10 CFR 50.46, "Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors" - 2006 Annual Report," L-2007-082, May 23, 2007.

2. Letter from W. Jefferson, Jr. to US NRC, "Turkey Point Units 3 and 4, Dockets Nos. 50-250 and 50-251, 10 CFR 50.46, "Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors" Day Special Report," L-2007-092, June 25, 2007.

3. Letter from W. Jefferson, Jr. to US NRC, "Turkey Point Units 3 and 4, Dockets Nos. 50-250 and 50-251, 10 CFR 50.46, "Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors" Day Special Report," L-2007-116, August 9, 2007.

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 (EM), or in the application of such models that affect the peak clad temperature calculation and their effect on the limiting ECCS analysis. The attachment to this letter provides the Florida Power and Light Company (FPL) report for Turkey Point Units 3 and 4 for 2007.

FPL letter L-2007-082 (Reference 1), documented no changes in Peak Clad Temperature (PCT) for the Small Break Loss of Coolant Accident (SBLOCA) or the Large Break Loss of Coolant Accident (LBLOCA) for Turkey Point Units 3 and 4 during 2006. FPL letters L-2007-092 (Reference 2) and L-2007-116, (Reference 3) documented several changes to PCT for the LBLOCA for Turkey Point Units 3 and 4 during 2007. There were no changes to the SBLOCA reported during 2007. Attachment 1 provides the PCT cumulative changes for the LBLOCA and SBLOCA as reported during 2007 by FPL letters L-2007-092 and L-2007-116. There were no other changes to the PCT for LBLOCA or SBLOCA during the balance of 2007. The cumulative changes reported for the LBLOCA and SBLOCA were 271 OF and 105 OF, respectively.

an FPL Group company

L-2008-122 Page 2 of 2 The cumulative changes to the LBLOCA EM and SBLOCA EM PCT exceed 50°F by 221 OF and 55 'F, respectively. As per 10 CFR 50.46 requirements, a change ecceeding 50 OF has to be reported within 30 days from its determination. The 30-day reporting requirementwas met by submittal of FPL letters L-2007-092 and L-2007-116. In addition to reporting, 10 CFR 50.46 also requires that a schedule for reanalysis be provided or compliance with the requirements of the regulation be shown. As discussed in FPL letters L-2007-092 and L-2007-116, compliance with 10 CFR 50.46 requirements is demonstrated by the total estimated LBLOCA PCT of2104OF and 1986 OF respectively, and the SBLOCA PCT of 1689 *F, all remaining well below the limit of 2200 OF and by the total cumulative PCT changes having been calculated conservatively.

Accordingly, no schedule for reanalysis is required.

Should there be any questions, please contact Olga Hanek, Acting Licensing Manager, at 305-246-6607.

Vice Pr ident Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant

L-2008-122 Attachment 1 Page 1 of 1 Table 1 Peak Cladding Cumulative Temperature Chan2e SBLOCA 2006 10 CFR 50.46 Annual Report 1689 OF 105 OF Changes in 2007 0 OF 0 OF 2007 10 CFR 50.46 Annual Report 1689 OF 105 OF Peak Cladding Cumulative LBLOCA Temperature Change 2006 10 CFR 50.46 Annual Report (Ref. 1) 2064OF 113 OF Change in June 2007 (Ref. 2) 40 OF 153 OF Change in August 2007 (Ref. 3) -118OF 271 OF 2007 10 CFR 50.46 Annual Report 1986 OF 271 OF