ML033510324
| ML033510324 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  (NPF-003) |
| Issue date: | 01/06/2004 |
| From: | Lyon C NRC/NRR/DLPM/LPD3 |
| To: | Myers L FirstEnergy Nuclear Operating Co |
| Lyon C, NRR/DLPM, 415-1292 | |
| References | |
| TAC MC1283 | |
| Download: ML033510324 (4) | |
Text
January 6, 2004 Mr. Lew W. Myers Chief Operating Officer FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station 5501 North State Route 2 Oak Harbor, OH 43449-9760
SUBJECT:
DAVIS-BESSE NUCLEAR POWER STATION, UNIT 1 - LICENSING BASIS FOR NOT ASSUMING A PASSIVE FAILURE OF MANUAL VALVE SW-82 FOLLOWING A POSTULATED LOSS-OF-COOLANT ACCIDENT (TAC NO.
Dear Mr. Myers:
By letter from you to the NRC dated October 6, 2003 (ADAMS Accession No. ML032820448),
FirstEnergy Nuclear Operating Company submitted for review its licensing basis for not assuming the passive failure of service water system manual valve SW-82 following a postulated loss-of-coolant accident (LOCA) at the Davis-Besse Nuclear Power Station, Unit 1 (Davis-Besse). Manual butterfly valve SW-82 is the emergency core cooling system (ECCS) pump room cooler combined service water outlet header valve. During an NRC inspection, a question was raised regarding whether or not separation of the valve disc from the valve stem, with the valve disc subsequently blocking flow from the ECCS pump room coolers, was credible and required to be assumed as part of the passive failure analysis. The issue was documented as Unresolved Item No. 2002-014-05 in NRC Inspection Report 50-346/02-14, dated February 26, 2003 (ADAMS Accession No. ML030630291).
Based upon the detailed licensing basis and regulatory information provided in your letter dated October 6, 2003, the NRC staff concludes that SW-82 is not required to be analyzed with respect to a passive failure, e.g., stem-to-disc separation. Therefore, the NRC staff concludes that a passive failure of manual valve SW-82 following a LOCA is not required to be assumed under the Davis-Besse licensing basis.
If you have any further questions regarding this matter, please call me at 301-415-2296.
Sincerely,
/RA/
Carl F. Lyon, Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-346 cc: See next page
FirstEnergy Nuclear Operating Company submitted for review its licensing basis for not assuming the passive failure of service water system manual valve SW-82 following a postulated loss-of-coolant accident (LOCA) at the Davis-Besse Nuclear Power Station, Unit 1 (Davis-Besse). Manual butterfly valve SW-82 is the emergency core cooling system (ECCS) pump room cooler combined service water outlet header valve. During an NRC inspection, a question was raised regarding whether or not separation of the valve disc from the valve stem, with the valve disc subsequently blocking flow from the ECCS pump room coolers, was credible and required to be assumed as part of the passive failure analysis. The issue was documented as Unresolved Item No. 2002-014-05 in NRC Inspection Report 50-346/02-14, dated February 26, 2003 (ADAMS Accession No. ML030630291).
Based upon the detailed licensing basis and regulatory information provided in your letter dated October 6, 2003, the NRC staff concludes that SW-82 is not required to be analyzed with respect to a passive failure, e.g., stem-to-disc separation. Therefore, the NRC staff concludes that a passive failure of manual valve SW-82 following a LOCA is not required to be assumed under the Davis-Besse licensing basis.
If you have any further questions regarding this matter, please call me at 301-415-2296.
Sincerely,
/RA/
Carl F. Lyon, Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-346 cc: See next page DISTRIBUTION:
PUBLIC RidsNrrLATHarris DSolorio PD3-2 Reading RidsNrrPMJHopkins JTatum RidsNrrDlpmLpdiii (WRuland)
CThomas, RIII RidsNrrDlpmLpdiii-2 (AMendiola)
CLipa, RIII RidsNrrPMFLyon RGardner, RIII ADAMS Accession No.:ML033510324 OFFICE PDIII-2/PM PDIII-2/LA SPLB/SC PDIII-2/SC NAME FLyon PCoates for THarris DSolorio AMendiola DATE 12/18/03 12/18/03 12/19/03 01/06/04
Davis-Besse Nuclear Power Station, Unit 1 cc:
Mary E. OReilly FirstEnergy Corporation 76 South Main St.
Akron, OH 44308 Manager - Regulatory Affairs FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station 5501 North State - Route 2 Oak Harbor, OH 43449-9760 Director, Ohio Department of Commerce Division of Industrial Compliance Bureau of Operations & Maintenance 6606 Tussing Road P.O. Box 4009 Reynoldsburg, OH 43068-9009 Regional Administrator U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60523-4351 Michael A. Schoppman Framatome ANP 1911 N. Ft. Myer Drive Rosslyn, VA 22209 Resident Inspector U.S. Nuclear Regulatory Commission 5503 North State Route 2 Oak Harbor, OH 43449-9760 Randel J. Fast, Plant Manager FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station 5501 North State - Route 2 Oak Harbor, OH 43449-9760 Dennis Clum Radiological Assistance Section Supervisor Bureau of Radiation Protection Ohio Department of Health P.O. Box 118 Columbus, OH 43266-0118 Carol OClaire, Chief, Radiological Branch Ohio Emergency Management Agency 2855 West Dublin Granville Road Columbus, OH 43235-2206 Zack A. Clayton DERR Ohio Environmental Protection Agency P.O. Box 1049 Columbus, OH 43266-0149 State of Ohio Public Utilities Commission 180 East Broad Street Columbus, OH 43266-0573 Attorney General Department of Attorney General 30 East Broad Street Columbus, OH 43216 President, Board of County Commissioners of Ottawa County Port Clinton, OH 43252 President, Board of County Commissioners of Lucas County One Government Center, Suite 800 Toledo, OH 43604-6506 David Lochbaum, Nuclear Safety Engineer Union of Concerned Scientists 1707 H Street NW, Suite 600 Washington, DC 20006 The Honorable Dennis J. Kucinich United States House of Representatives Washington, D.C. 20515 The Honorable Dennis J. Kucinich, Member United States House of Representatives 14400 Detroit Avenue Lakewood, OH 44107 Mr. James P. Riccio Nuclear Policy Analyst Greenpeace 702 H. Street, NW, Suite 300 Washington, DC 20001 Paul Gunter Director Nuclear Watchdog Project Nuclear Information & Resource Service 1424 16th Street NW Suite 401 Washington, DC 20009