ML020840729
| ML020840729 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/02/2002 |
| From: | Olshan L NRC/NRR/DLPM/LPD2 |
| To: | Mccollum W Duke Energy Corp |
| Olshan L N, NRR/DLPM, 415-1419 | |
| References | |
| TAC MB3752, TAC MB3753, TAC MB3754 | |
| Download: ML020840729 (4) | |
Text
April 2, 2002 Mr. William R. McCollum, Jr.
Vice President, Oconee Site Duke Energy Corporation P.O. Box 1439 Seneca, South Carolina 29679
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 RE: ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF OPERATIONAL CONDITION RELATED TO HIGH ENERGY LINE BREAKS IN THE TURBINE BUILDING (TAC NOS. MB3752, MB3753 AND MB3754)
By letter dated March 28, 2001, we sent you a copy of a preliminary Accident Sequence Precursor (ASP) analysis for the Oconee Nuclear Station, Units 1, 2, and 3. The preliminary ASP analysis was prepared in response to an operational condition reported in License Event Report No. 269/1999-001-01. The preliminary ASP analysis addressed the potential for postulated high-energy line breaks (HELBs) in the turbine building leading to the failure of safety-related 4kV switchgear.
By letter dated November 5, 2001, you responded to the preliminary ASP analysis in order to clarify that the analyzed condition was not an actual event but rather an existing design basis accident scenario for the Oconee units that had been previously evaluated and accepted by the NRC staff. The staff has reviewed your response and agrees that the HELBs analyzed in the preliminary ASP analysis are associated with pipe break scenarios which have been previously reviewed and accepted by the staff as part of the licensing and design bases for the Oconee Nuclear Station. Specifically, we agree that the identified HELB scenarios are not associated with an actual event and are within Oconees licensing and design bases. However, these conclusions do not affect the risk significance identified in the ASP analysis.
Please contact me at (301) 415-1419, if you have any further questions on this matter.
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 cc: See next page
Mr. William R. McCollum, Jr.
April 2, 2002 Vice President, Oconee Site Duke Energy Corporation P.O. Box 1439 Seneca, South Carolina 29679
SUBJECT:
OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 RE: ACCIDENT SEQUENCE PRECURSOR ANALYSIS OF OPERATIONAL CONDITION RELATED TO HIGH ENERGY LINE BREAKS IN THE TURBINE BUILDING (TAC NOS. MB3752, MB3753 AND MB3754)
By letter dated March 28, 2001, we sent you a copy of a preliminary Accident Sequence Precursor (ASP) analysis for the Oconee Nuclear Station, Units 1, 2, and 3. The preliminary ASP analysis was prepared in response to an operational condition reported in License Event Report No. 269/1999-001-01. The preliminary ASP analysis addressed the potential for postulated high-energy line breaks (HELBs) in the turbine building leading to the failure of safety-related 4kV switchgear.
By letter dated November 5, 2001, you responded to the preliminary ASP analysis in order to clarify that the analyzed condition was not an actual event but rather an existing design basis accident scenario for the Oconee units that had been previously evaluated and accepted by the NRC staff. The staff has reviewed your response and agrees that the HELBs analyzed in the preliminary ASP analysis are associated with pipe break scenarios which have been previously reviewed and accepted by the staff as part of the licensing and design bases for the Oconee Nuclear Station. Specifically, we agree that the identified HELB scenarios are not associated with an actual event and are within Oconees licensing and design bases. However, these conclusions do not affect the risk significance identified in the ASP analysis.
Please contact me at (301) 415-1419, if you have any further questions on this matter.
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 cc: See next page DISTRIBUTION:
PUBLIC CHawes PDII-1 R/F OGC RLaufer ACRS LOlshan RHaag, RII Accession Number: ML020840729
- No changes to letter dated 3/4/02 OFC PDII-1/PM PDII-1/LA SPLB/ASC PDII-1/SC NAME LOlshan CHawes BThomas*
RLaufer DATE 4/2/02 4/2/02 3/4/02 4/2/02 OFFICIAL RECORD COPY
Oconee Nuclear Station cc:
Ms. Lisa F. Vaughn Legal Department (PBO5E)
Duke Energy Corporation 422 South Church Street Charlotte, North Carolina 28201-1006 Anne W. Cottingham, Esquire Winston and Strawn 1400 L Street, NW Washington, DC 20005 Manager, LIS NUS Corporation 2650 McCormick Drive, 3rd Floor Clearwater, Florida 34619-1035 Senior Resident Inspector U. S. Nuclear Regulatory Commission 7812B Rochester Highway Seneca, South Carolina 29672 Mr. Henry Porter, Director Division of Radioactive Waste Management Bureau of Land and Waste Management Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201-1708 Mr. Michael A. Schoppman Framatome ANP 1911 North Ft. Myer Drive Suite 705 Rosslyn, VA 22209 Mr. L. E. Nicholson Compliance Manager Duke Energy Corporation Oconee Nuclear Site 7800 Rochester Highway Seneca, South Carolina 29672 Ms. Karen E. Long Assistant Attorney General North Carolina Department of Justice P. O. Box 629 Raleigh, North Carolina 27602 Mr. C. Jeffrey Thomas Manager - Nuclear Regulatory Licensing Duke Energy Corporation 526 South Church Street Charlotte, North Carolina 28201-1006 Mr. Richard M. Fry, Director Division of Radiation Protection North Carolina Department of Environment, Health, and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Mr. Peter R. Harden, IV VP-Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road 12th Floor Charlotte, North Carolina 28210