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[Table view] |
Text
Maria Korsnick R.E. Ginna Nuclear Power Plant. LLC Site Vice President 1503 Lake Road Ontario, New York 14519-9364 585.771.3494 585.771.3943 Fax maia.korsnick@costellation.com Constellation Energy Generation Group March 28, 2006 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk
SUBJECT:
R.E. Ginna Nuclear Power Plant Docket No. 50-244 10CFR50.46 30 Dav and Annual ECCS Report
References:
(a) Westinghouse Letter LTR-LIS-06-117,
Subject:
10CFR50.46 Annual Notification and Reporting for 2005, dated March 6, 2006.
(b) Letter from Mary G. Korsnick (Ginna LLC) to Donna M. Skay (NRC), "License Amendment Request Regarding Revised Loss of Coolant Accident (LOCA)
Analyses - Changes to Accumulator, Refueling Water Storage (RWST), and Administrative Control Technical Specifications", dated April 29, 2005.
In accordance with the requirements in 10CFR50.46 paragraph (a)(3)(ii), this 30 day and annual Emergency Core Cooling System (ECCS) report is hereby submitted by R.E. Ginna Nuclear Power Plant, LLC (Ginna LLC).
Westinghouse, the provider of loss of coolant accident (LOCA) analysis services for the R.E. Ginna Nuclear Power Plant, has provided an update to the peak cladding temperature (PCT) margin in Reference (a). A summary of the cumulative PCT changes can be found in Attachment 1 to this letter.
The large-break LOCA PCT has increased by 130 F since the last annual report. The large-break LOCA PCT is currently at 21000 F.
The small-break LOCA PCT has not changed since the last annual report. The small-break LOCA PCT remains at 1381 0F. Because the cumulative sum of the absolute magnitudes of the effects on the small-break LOCA PCT remain greater than 50'F, the changes conservatively qualify as being significant as defined in 10CFR50.46(a)(3)(i). Consequently, the cumulative changes are being reported in this 30 day report.
The small-break LOCA PCT value determined in the analysis of record, when combined with all PCT margin allocations, remains over 800'F below the 10CFR50.46 acceptance criteria of 2200'F. As such, no reanalysis is currently planned to address the specific issues raised in Attachment 1. Ginna LLC has previously submitted (Reference (b)) new large-break LOCA and small-break LOCA analyses in support of the planned power uprate of the facility.
O/53/ _'
If you should have any questions regarding this submittal, please contact Robert Randall at (585) 771-3734.
Very truly you s, Mary G. Korsnick
Attachment:
LOCA PCT Summary, 2006 Update cc: S. J. Collins, NRC P. D. Milano, NRC Resident Inspector, NRC
ATTACHMENT (1)
LOCA PCT
SUMMARY
2006 UPDATE
ATTACHMENT 1 LOCA PCT
SUMMARY
Large-Break LOCA R.E. Ginna Nuclear Power Plant Evaluation Model: UPI SECY Fuel: OFA FQ = 2.45 FA H= 1.75 SGTP = 15%
A. Analysis of Record (3/03) (effective 6/03) PCT = 20870 F B. 2004 10CFR50.46 Model Assessments
- 1. None APCT = 00F C. 2005 10CFR50.46 Model Assessments
- 1. SECY Cold Leg Nozzle Expansion APCT = 13'F D. Other Margin Allocations
- 1. None APCT = 00F Licensing Basis PCT = 2100°F
ATTACHMENT 1 LOCA PCT
SUMMARY
Small-Break LOCA R.E. Ginna Nuclear Power Plant Evaluation Model: NOTRUMP Fuel: OFA FQ = 2.50 F, H,= 1.75 SGTP= 15%
A. Analysis of Record (6/95) (effective 6/96) APCT = 1308WF B. 1995 10CFR50.46 Model Assessments
- 1. NOTRUMP Specific Enthalpy Error APCT = 20'F
- 2. SALIBRARY Double Precision Errors APCT = -15 0F C. 1996 10CFR50.46 Model Assignments
- 1. SBLOCA Fuel Rod Initialization Error APCT= 10F D. 1997 10CFR50.46 Model Assessment
- 1. None APCT = 0°F E. 1998 10CFR50.46 Model Assessments
- 1. None APCT = 0°F F. 1999 10CFR50.46 Model Assessments
- 1. None APCT = 0°F G. 2000 10CFR50.46 Model Assessments
- 1. NOTRUMP - Mixture Level Tracking /
Region Depletion Errors APCT= 13°F H. 2001 10CFR50.46 Model Assessments
- 1. None APCT = 0°F I. 2002 10CFR50.46 Model Assessments
- 1. None APCT = 0°F J. 2003 10CFR50.46 Model Assessments
- 1. NOTRUMP - Bubble Rise /
Drift Flux Model Inconsistencies APCT = 35°F K. 2004 10CFR50.46 Model Assessments
- 1. None APCT = OF L. 2005 10CFR50.46 Model Assessments
- 1. None APCT = 0°F M. Ginna Evaluations
- 1. AnnularAxial Pellets (1997 evaluation, SEV-1108) APCT = 10°F N. Other Margin Allocations
- 1. None APCT = 0°F Licensing Basis PCT = 1381°F
