L-2010-074, 10 CFR 50.46, Acceptance Criteria for Emergency Core Cooling Systems in Light Water Nuclear Power Reactors, 2009 Annual Report
| ML101170117 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 04/15/2010 |
| From: | Kiley M Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2010-074 | |
| Download: ML101170117 (3) | |
Text
0 APR 15 2010 IPL.
L-2010-074 POWERING TODAY.
10 CFR 50.46 EMPOWERING TOMORROW.15 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" - 2009 Annual Report
References:
- 1. Letter from W. Jefferson, Jr. to US NRC Document Control Desk, "Turkey Point Units 3 & 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" - 2008 Annual Report," L-2009-073, April 28, 2009.
- 2. Letter from M. E. Frankle to R. Rivera,.'Turkey Point Units 3 and 4, 10 CFR 50.46 Report 2009," NF-FP-10-26, February 5, 2010.
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 2009.
FPL letter L-2009-073 (Reference 1), documented no changes in Peak Clad Temperature (PCT) for the Small Break Loss of Coolant Accident (SBLOCA) and no changes for the Large Break Loss of Coolant Accident (LBLOCA) during 2008 for Turkey Point Units 3 and 4. The LBLOCA PCT reported was 1986 OF, and the SBLOCA PCT reported was 1689 OF. The cumulative changes reported by L-2009-073 for the LBLOCA and SBLOCA were 271 OF and 105 OF, respectively. There were no changes to thePCT for the LBLOCA or SBLOCA during 2009. provides the PCT cumulative'changes for the LBLOCA and SBLOCA for Turkey Point Units 3 and 4.
10 CFR 50.46(a)(3)(ii) requires that changes to the LBLOCA Evaluation Model (EM) and SBLOCA EM PCT exceeding 50 OF have to be reported to the NRC within 30 days from its determination. Since there were no changes in PCT for the LBLOCA and SBLOCA evaluation models in 2009, no special reporting was required. 10 CFR 50.46(a)(3)(ii) also requires that a schedule for reanalysis be provided or compliance with the requirements of the regulation be shown. Compliance with 10 CFR 50.46 requirements is demonstrated by the total estimated LBLOCA PCT of 1986 OF, and the SBLOCA PCT of 1689 OF, both remaining well below the limit of 2200 OF and by the total cumulative PCT changes having been calculated conservatively.
Accordingly, a schedule for reanalysis is not required.
an FPL Group company
L-2010-074 Page 2 of 2 Should there be any questions, please contact Robert Tomonto, Licensing Manager, at 305-246-7327.
Very truly yours, Michael Kiley Vice President Turkey Point Nuclear Plant Attachment cc:
Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant
L-2010-074 Page 1 of 1 Table 1 SBLOCA 2008 10 CFR 50.46 Annual Report (Ref. 1)
Errors in 2009 (Ref. 2)
No errors 2009 10 CFR 50.46 Annual Report Peak Cladding Temperature 1689 OF Cumulative Change 105 OF 0 OF 0 OF 105 OF
.1689 OF LBLOCA 2008 10 CFR 50.46 Annual Report (Ref. 1)
Errors in 2009 (Ref. 2)
Discrepancy in Metal Masses from Drawings HOTSPOT Gap Heat Transfer Logic HOTSPOT Statistical Output Logic Peak Cladding Temperature 1986 OF Cumulative Change 271 OF 0 OF 0 OF 0 OF 0 OF 0 OF 0 OF 2009 10 CFR 50.46 Annual Report 1986 OF 271 OF