RNP-RA/05-0122, Annual Report of Changes to or Errors Discovered in an Acceptable Loss-Of-Coolant Accident Evaluation Model Application for the Emergency Core Cooling System

Annual Report of Changes to or Errors Discovered in an Acceptable Loss-Of-Coolant Accident Evaluation Model Application for the Emergency Core Cooling System

ML053470324
Person / Time
Site:	Robinson
Issue date:	12/08/2005
From:	Baucom C Progress Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RNP-RA/05-0122
Download: ML053470324 (4)

Text

a 11, -4h 10 CFR 50.46(a)(3)(ii) 9 Progress Energy Serial RNP-RA/05-0122 DEC 0 8 2005 linitehI States Nuclear Regulatory Commission t1 'Document Control Desk

'Mi ngton, DC 20555 tBOBINSON STEAM ELECTRIC PLANT, UNIT' NO.2A D)CKET NO. 50-261/LICENSE NO. DPR-23 ANNUAL REPORT OF CHANGES TO OR ERRORS DISCOVERED IN AN ACCEPTABLE LOSS-OF-COOLANT ACCIDENT EVALUATION  ;

MODEL APPLICATION FOR THE EMERGENCY CORE COOLING SYSTEM Ladies and Gentlemen:

In accordance with the provisions of the Code of Federal Regulations, Title 10, Part 50.46 (10 CFR 50.46), Carolina Power and Light Company, also known as Progress Energy Carolinas, Inc., is submitting the attached report of non-significant changes to and errors discovered in an, acceptable Loss-of-Coolant Accident (LOCA) evaluation model (EM) for the Emergency Core Cooling System at the H. B. Robinson Steam Electric Plant (HBRSEP), Unit No. 2. The applicable LOCA EMs are referenced in the HBRSEP, Unit No. 2, Core Operatng Limits Report. Non-significant changes to or errors discovered in EMs and EM applications were previously reported to the Nuclear Regulatory Commission by letter dated December 13,2004. This submittal satisfies the' 10 CFR 50.46(a)(3)(ii) requirement for annual reporting of LOCA EM changes for HBRSEP, UnitNo. 2.

The non-significant changes and error corrections in the Framatome-ANP (FANP) SENMPWR-98 Large Break LOCA i(LBLOCA) EM and the FANP EXEM PWR Small Break LOCA (SBLOCA)-

EM since the last annual report are provided in Attachment I. The effects of these non-significant changes and error corrections on HBRSEP, Unit No. 2, peak cladding temperature (PCT) estimates are also summarized in Attachment I.

The latest PCT estimates for the LBLOCA and SBLOCA are included in Attachment II.

If you have any questions concerning this matter, please contact me at (843) 857-1253.

Sincerely, C. T. Baucom Supervisor - Licensing/Regulatory Programs Progress Energy Carolinas. Inc.

Robinson Nuclear Plant 3581 West Entrance Road Q Hartsville, SC29550

United States Nuclear Regulatory Commission Serial: RNP-RA/05-0122 Page 2 of 2 CTB/cac Attachments:

I. Report of Changes/Errors in Loss-of-Coolant Accident Evaluation Models for the Emergency Core Cooling System II. Peak Cladding Temperature Estimates c: Dr. W. D. Travers, NRC, Region II Mr. C. P. Patel, NRC, NRR NRC Resident Inspector, HBRSEP

, ' United States Nuclear Regulatory Commission Attachment I to Serial: RNP-RA/05-0122 Page 1 of 1 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 REPORT OF CHANGES/ERRORS IN LOSS-OF-COOLANT ACCIDENT EVALUATION MODELS FOR THE EMERGENCY CORE COOLING SYSTEM This report provides an estimate of the effect on peak cladding temperature (PCT) of non-significant changes and error corrections in the Loss-of-Coolant Accident (LOCA) evaluation models (EMs) and EM applications for the Emergency Core Cooling System (ECCS) at the H. B.

Robinson Steam Electric Plant (HBRSEP), Unit No. 2, covering the period of November 29, 2004, through November 16, 2005.

Large Break Loss-of-Coolant Accident (LBLOCA) Evaluation Model CHANGED CONDITION PCT IMPACT (OF)

None 0 Cumulative Impact 0 Small Break Loss-of-Coolant Accident (SBLOCA) Evaluation Model

United States Nuclear Regulatory Commission Attachment II to Serial: RNP-RA/05-0122 Page 1 of 1 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 PEAK CLADDING TEMPERATURE ESTIMATES The current peak cladding temperature (PCT) estimates associated with Loss-of-Coolant Accident (LOCA) Emergency Core Cooling System (ECCS) evaluation models are listed below. These estimates include the cumulative effects of significant and non-significant error corrections and evaluation model changes through November 16, 2005.

Event PCT (OF)

Large Break LOCA, ECCS Injection Mode 2018 Small Break LOCA, ECCS Injection Mode 1679