ML032740002

Regarding Final Accident Sequence Precursor Analysis of April 2001 Operational Event

ML032740002
Person / Time
Site:	Oconee
Issue date:	10/01/2003
From:	Olshan L NRC/NRR/DLPM/LPD2
To:	Rosalyn Jones Duke Energy Corp
Olshan L N, NRR/DLPM, 415-1419
References
IR-00-008
Download: ML032740002 (3)

Text

October 1, 2003 Mr. Ronald A. Jones Vice President, Oconee Site Duke Energy Corporation 7800 Rochester Highway Seneca, SC 29672

SUBJECT:

OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 RE: FINAL ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF APRIL 2001 OPERATIONAL EVENT

Dear Mr. Jones:

Enclosed for your information is the final Accident Sequence Precursor (ASP) analysis of an operational event which occurred at the Oconee Nuclear Station, Units 1, 2, and 3. This condition, which has existed since the 1970s, was documented in NRC Inspection Reports 50-269/00-08, 50-270/00-08, and 50-287/00-08, dated April 30, 2001. The results of the final ASP analysis indicate that this event is a precursor [i.e., the importance or change in core damage probability >1E-6] for all three units at Oconee.

In the past, preliminary versions of all ASP analyses were issued for internal peer review by NRC staff and for external peer review by the licensee. Comments received from these reviews were then resolved as part of the final analysis. To increase efficiency, we are now issuing the non-controversial ASP analyses as final documents. In this event, the findings in the ASP analysis (i.e., the change in core damage probability and dominant risk contributors) are consistent with those in the Significance Determination Process (SDP). Since this ASP analysis confirms the results of the final SDP, that has been reviewed by the NRC staff and Duke Energy, it is being issued as a final product for information only.

Please contact me at 301-415-1419 if you have any questions regarding the enclosure.

Due to the potential sensitivity of the information described in the enclosed ASP analysis, the NRC staff has not made this Enclosure publicly available.

Sincerely,

/RA/

Leonard N. Olshan, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-269, 50-270, and 50-287

Enclosure:

ASP Final Analysis (Sensitive - Not for Public Disclosure) cc w/o encl: See next page

ML032740002 OFFICE PDII-1/PM PDII-1/LA PDII-1/SC NAME LOlshan CHawes JNakoski DATE 9/25/2003 9/22/2003 9/26/2003 Oconee Nuclear Station cc:

Ms. Lisa F. Vaughn Mr. L. E. Nicholson Duke Energy Corporation Compliance Manager Mail Code - PB05E Duke Energy Corporation 422 South Church Street Oconee Nuclear Site P.O. Box 1244 7800 Rochester Highway Charlotte, North Carolina 28201-1244 Seneca, South Carolina 29672 Anne W. Cottingham, Esquire Ms. Karen E. Long Winston and Strawn Assistant Attorney General 1400 L Street, NW North Carolina Department of Washington, DC 20005 Justice P. O. Box 629 Manager, LIS Raleigh, North Carolina 27602 NUS Corporation 2650 McCormick Drive, 3rd Floor Mr. C. Jeffrey Thomas Clearwater, Florida 34619-1035 Manager - Nuclear Regulatory Licensing Senior Resident Inspector Duke Energy Corporation U. S. Nuclear Regulatory 526 South Church Street Commission Charlotte, North Carolina 28201-1006 7812B Rochester Highway Seneca, South Carolina 29672 Mr. Richard M. Fry, Director Division of Radiation Protection Mr. Henry Porter, Director North Carolina Department of Division of Radioactive Waste Management Environment, Health, and Bureau of Land and Waste Management Natural Resources Department of Health and Environmental 3825 Barrett Drive Control Raleigh, North Carolina 27609-7721 2600 Bull Street Columbia, South Carolina 29201-1708 Mr. Peter R. Harden, IV VP-Customer Relations and Sales Mr. Michael A. Schoppman Westinghouse Electric Company Framatome ANP 6000 Fairview Road 1911 North Ft. Myer Drive 12th Floor Suite 705 Charlotte, North Carolina 28210 Rosslyn, VA 22209