ML16342E162
| ML16342E162 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 07/02/1998 |
| From: | Steven Bloom NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| References | |
| GL-97-04, GL-97-4, TAC-M99983, TAC-M99984, NUDOCS 9807090246 | |
| Download: ML16342E162 (6) | |
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UNITED STATES NUCLEAR REGULATORYCOMMISSION WASHINGTON, D.C. 20555-0001 July 2, 1998 Mr. Gregory M. Rueger, Senior Vice President and General Manager Pacific Gas and Electric Company NPG - Mail Code A10D P. O. Box 770000 San Francisco, California 94177
SUBJECT:
COMPLETION OF LICENSING ACTION FOR GENERIC LETTER 97 DIABLOCANYON POWER PLANT, UNITS 1 AND 2 (TAC NOS. M99983 AND M99984)
Dear Mr. Rueger:
The U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 97-04, "Assurance of Sufficient Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," to all holders of operating licenses or construction permits on October 7, 1997. The NRC issued GL 97-04 to confirm the adequacy of the net positive suction head (NPSH) available for emergency core cooling (including core spray and decay heat removal) and containment heat removal pumps under all design-basis accident scenarios.
In GL 97-04, the NRC staff specifically requested that licensees provide the information outlined below for each of their facilities.
Specify the general methodology used to calculate the head loss associated with the ECCS suction strainers.
2.
Identify the required NPSH and the available NPSH.
3.
Specify whether the current design-basis NPSH analysis differs from the most recent analysis reviewed and approved by the NRC for which a safety evaluation was issued.
4.
Specify whether containment overpressure (i.e., containment pressure above the vapor pressure of the sump or suppression pool fluid)was credited in the calculation of available NPSH. Specify the amount of overpressure needed and the minimum overpressure available.
5.
When containment overpressure is credited in the calculation of available NPSH, confirm that an appropriate containment pressure analysis was done to establish the minimum containment pressure.
'P807090246
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Mr. Gregory M. Rueger July 2, 1998 In response to GL 97-04, you provided letters dated October 29, 1997, and January 5, 1998, for Diablo Canyon Power Plant, Units 1 and 2. These submittais provided the information requested by GL 97-04. The staff has reviewed your responses and has concluded that all requested information has been provided; therefore, we consider GL 97-04 to be closed for Diablo Canyon Power Plant, Units 1 and 2. Thank you for your prompt and complete response.
Ifyou have any questions regarding this matter, please contact me at (301) 415-1313.
Sincerely, Original Signed By Docket Nos. 50-275 and 50-323 cc: See next page
'teven D. Bloom, Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation WlTTI 0
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Mr. Gregory M. Rueger July 2, 1998
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NRC Resident Inspector Diablo Canyon Nuclear Power Plant do U.S. Nuclear Regulatory Commission P. O. Box 369 Aviia Beach, California 93424 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Christopher J. Warner, Esq.
Pacific Gas & Electric Company Post Office Box 7442 San Francisco, California 94120 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. O. Box 164 Pismo Beach, California 93448 Mr. Robert P. Powers Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. O. Box 56 Avila Beach, California 93424 Chairman San Luis Obispo County'Board of Supervisors.
Room 370 County Government Center San Luis Obispo, California 93408 Telegram-Tribune ATTN: Managing Editor 1321 Johnson Avenue P.O. Box 112 San Luis Obispo, California 93406 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Room 4102 San Francisco, California 94102 Mr. Steve Hsu Radiologic Health Branch State Department of Health Services Post Office Box 942732.
Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, California 93940
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