L-2007-082, 10 CFR 50.46, Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors - 2006 Annual Report

10 CFR 50.46, Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors - 2006 Annual Report

ML071520080
Person / Time
Site:	Turkey Point
Issue date:	05/23/2007
From:	Jefferson W Florida Power & Light Co
To:	Document Control Desk, NRC/NRR/ADRO
References
L-2007-082
Download: ML071520080 (2)

Text

MAY 2 3 2007 FIPL L-2007-082 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" - 2006 Annual Report 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. The attachment to this letter provides the Florida Power and Light Company (FPL) report for Turkey Point Units 3 and 4 for 2006.

There were no changes in Peak Clad Temperature (PCT) in 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. Attachment 1 provides the PCT cumulative changes for the LBLOCA and SBLOCA as reported for 2005 by FPL letter L-2006-123, dated May 18, 2006. The cumulative changes reported for the LBLOCA and SBLOCA were 113 °F and 105 OF, respectively.

The cumulative changes to the LBLOCA EM and SBLOCA EM PCT exceed 50 °F by 63 OF and 55 OF, respectively. As per 10 CFR 50.46 requirements, a change exceeding 50 OF has to be reported within 30 days from its determination. The 30-day reporting requirement was met by submittal of FPL letter L-2005-096 dated April 27, 2005. 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 letter L-2005-096, compliance with 10 CFR 50.46 requirements is demonstrated by the total estimated LBLOCA PCT of 2064 °F and the SBLOCA PCT of 1689 OF 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 James Connolly, Licensing Manager, at 305-246-6632.

Very truly yours, William Jefferson, Jr.

Vice President Turkey Point Nuclear Plant Attachment cc: Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant A()a an FPL Group company

L-2007-082 Attachment 1 Page 1 of 1 Table 1 Turkey Point Units 3 and 4 SBLOCA and LBLOCA PCTs Peak Cladding Cumulative Temperature Change UNITS 3 AND 4 SBLOCA 2005 10 CFR 50.46 Annual Report 1689 OF 105 OF Changes in 2006 0 OF 0 OF 2006 10 CFR 50.46 Annual Report 1689 OF 105 OF Peak Cladding Cumulative Temperature Change UNITS 3 AND 4 LBLOCA 2005 10 CFR 50.46 Annual Report 2064OF 113OF Changes in 2006 0 OF 0 OF 2006 10 CFR 50.46 Annual Report 2064OF 113 OF