ML16343A581
| ML16343A581 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 05/19/1998 |
| From: | Steven Bloom NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| References | |
| TAC-M98829, TAC-M98830, NUDOCS 9805260143 | |
| Download: ML16343A581 (4) | |
Text
May 19, 1998 Mr. Gregory M. Rueger, Senior Vice President and General Manager
'PacifiC Gas and Electric Company Nuclear Power Generation N9B P. O. Box 770000 San Francisco, California 94177
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION-INSTALLATIONOF THE COMPONENT COOLING WATER SURGE TANKPRESSURIZATION SYSTEM - DIABLOCANYON POWER PLANT, UNITS 1 AND 2 (TAC NOS.
M98829 AND M98830)
Dear Mr. Rueger:
In a letter dated May 22, 1997, you proposed a change to the technical specification requirements for the component cooling water (CCW) surge tank pressurization system.
Before we can proceed with our review of this proposed change request, you must submit for our review and approval a complete description of the modifications that were made to the CCW systems.
The information must be sufficient to enable the staff to perform an independent review of the modifications that were made, and should include (for example) system operating parameters, failure modes and effects analysis, all assumptions, and a one-line diagram depicting the componerits of the surge tank pressurization system.
You previously stated that the surge tank is sized to allow sufficient time for operators to respond to a leak in the CCW system, assuming a 200 gpm leak rate over a 20 minute period. Because increased pressure in the CCW system will result in an increased leak rate over what was originally assumed, you are requested to discuss in detail what new leak rate will be assumed for this scenario and how the time allowed for operator response willbe affected by this change.
The information requested should be provided as a supplement to the technical specification amendment application.
Ifyou have any questions regarding this request, please contact me at (301) 415-1313.
Sincerely, Original Signed By Steven D. Bloom, Project Manager Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323 cc: See next page DOCUMENT NAME: 98829DC.RAI OFC PDIV-2/PM PDIV-2/LA DIST IB T Docket PUBLIC PDIV-2 R/F EGA1 WBateman SBloom EPeyton OGC ACRS KPerkins, RIV/WCFO PGwynn, RIV JTatum NAME SIPloom DATE 5/ I~/98
~ey cR 5/Q/98 OFFICIALRECORD COPY 9805860143 980519 PDR ADQCK 05000275 P
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'Mr. Gr'egory M. Rueger cc:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. O. Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 1100 11th Street, Suite 311 Sacramento, California 95814 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. O. Box 164 Pismo Beach, California 93448 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 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 1
Sacramento, California 94232 Diablo Canyon Independent Safety Committee ATTN: Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D Monterey, California 93940 May 19, 1998 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Christopher J. Warner, Esq.
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Pacific Gas & Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. Robert P. Powers Vice President and Plant Manager Diablo Canyon Nuclear Power Plant P. O. Box.56 Avila Beach, California 93424 Telegram-Tribune ATTN: Managing Editor 1321 Johnson Avenue P.O. Box 112 San Luis Obispo, California 93406
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