ML050540613

Generic Letter 96-06, Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions (TAC No. M96803)

ML050540613
Person / Time
Site:	Davis Besse
Issue date:	03/03/2005
From:	Hopkins J NRC/NRR/DLPM/LPD3
To:	Bezilla M FirstEnergy Nuclear Operating Co
Hopkins J , NRR/DLPM, 301-415-3027
References
GL-96-006, TAC M96803
Download: ML050540613 (5)

Text

March 3, 2005 Mr. Mark B. Bezilla Vice President-Nuclear, Davis-Besse 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 - GENERIC LETTER 96-06, "ASSURANCE OF EQUIPMENT OPERABILITY AND CONTAINMENT INTEGRITY DURING DESIGN-BASIS ACCIDENT CONDITIONS" (TAC NO. M96803)

Dear Mr. Bezilla:

Generic Letter (GL) 96-06 was issued by the U.S. Nuclear Regulatory Commission (NRC) on September 30, 1996. GL 96-06 requested that licensees evaluate cooling water systems that serve containment air coolers to assure that they are not vulnerable to waterhammer and two-phase flow conditions, and that licensees evaluate thermally-induced overpressurization of isolated water-filled piping sections in containment. This letter pertains to the thermally-induced overpressurization issue.

You responded to the thermally-induced overpressurization issue in GL 96-06 by letters dated January 28, February 28, July 28 and September 30, 1997, and August 28, 1998. In your January 28, 1997, response, you identified 13 penetrations potentially vulnerable to a water solid volume that may be subjected to an increase in pressure due to heating of trapped fluid.

In your operability review of these penetrations, you determined that four penetrations meet the design-basis criteria and the remaining penetrations, where the criteria are exceeded, are operable based on piping plastic deformation and potential leakage through packing/valve seating surfaces.

In response to the NRC staff's request for additional information on March 18, 1998, by letter dated August 28, 1998, you provided your evaluation of the criteria and long-term corrective action plan to resolve the issue. You indicated that four of the penetrations meet the design-basis American Society of Mechanical Engineers Boiler and Pressure Vessel Code faulted stress allowables, four other penetrations had check valves installed, and one penetration had a relief valve installed. Procedural changes have been made for two penetrations to assure that the affected piping remains partially drained to prevent potential overpressurization. For the remaining two penetrations, you determined that the seating surfaces of the air-operated isolation valves (globe and diaphragm valves) associated with these penetrations provide inherent relief to prevent overpressurization.

M. Bezilla The NRC staff has reviewed your analytical evaluation criteria and finds it to meet the licensing commitments in the Updated Safety Analysis Report. The NRC staff concludes, based on the letters set out above, that your evaluation and proposed corrective actions provide an acceptable resolution for the issue of thermally-induced overpressurization of piping in containment.

However, due to recent piping modifications, the NRC staff requests that you either affirm that your responses are still valid in this area or supplement your responses. Therefore, the NRC staff requests that you respond within 45 days of the date of this letter with your schedule for response.

Sincerely,

/RA/

Jon B. Hopkins, Sr. 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

ML050540613 *memo from K. Manoly to S. Richards OFFICE LPM:PDIV-1 PM:PDIII-2 LA:PDIII-2 SC:EMEB

• SC:PDIII-2 NAME TAlexion JHopkins DClarke KManoly GSuh DATE 3/1/05 3/1/05 2/28/05 12/28/98 3/3/05 Davis-Besse Nuclear Power Station, Unit 1 cc:

Mary E. O'Reilly Carol OClaire, Chief, Radiological Branch FirstEnergy Corporation Ohio Emergency Management Agency 76 South Main St. 2855 West Dublin Granville Road Akron, OH 44308 Columbus, OH 43235-2206 Manager - Regulatory Affairs Zack A. Clayton FirstEnergy Nuclear Operating Company DERR Davis-Besse Nuclear Power Station Ohio Environmental Protection Agency 5501 North State - Route 2 P.O. Box 1049 Oak Harbor, OH 43449-9760 Columbus, OH 43266-0149 Director, Ohio Department of Commerce State of Ohio Division of Industrial Compliance Public Utilities Commission Bureau of Operations & Maintenance 180 East Broad Street 6606 Tussing Road Columbus, OH 43266-0573 P.O. Box 4009 Reynoldsburg, OH 43068-9009 Attorney General Office of Attorney General Regional Administrator 30 East Broad Street U.S. Nuclear Regulatory Commission Columbus, OH 43216 801 Warrenville Road Lisle, IL 60523-4351 President, Board of County Commissioners of Ottawa County Michael A. Schoppman Port Clinton, OH 43252 Framatome ANP 1911 N. Ft. Myer Drive President, Board of County Rosslyn, VA 22209 Commissioners of Lucas County One Government Center, Suite 800 Resident Inspector Toledo, OH 43604-6506 U.S. Nuclear Regulatory Commission 5503 North State Route 2 David Lochbaum, Nuclear Safety Engineer Oak Harbor, OH 43449-9760 Union of Concerned Scientists 1707 H Street NW, Suite 600 Barry Allen, Plant Manager Washington, DC 20006 FirstEnergy Nuclear Operating Company Davis-Besse Nuclear Power Station The Honorable Dennis J. Kucinich 5501 North State - Route 2 United States House of Representatives Oak Harbor, OH 43449-9760 Washington, D.C. 20515 Dennis Clum The Honorable Dennis J. Kucinich Radiological Assistance Section Supervisor United States House of Representatives Bureau of Radiation Protection 14400 Detroit Avenue Ohio Department of Health Lakewood, OH 44107 P.O. Box 118 Columbus, OH 43266-0118

Davis-Besse Nuclear Power Station, Unit 1 cc:

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 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