ML16342A078
| ML16342A078 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 04/30/1993 |
| From: | Peterson S Office of Nuclear Reactor Regulation |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342A079 | List: |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, NUDOCS 9305040215 | |
| Download: ML16342A078 (8) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 30, 1993 Docket Nos.
50-275 and 50-323 Nr. Gregory M. Rueger
,Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451 PE 0.
Box 770000 San Francisco, California 94177
Dear Hr. Rueger:
SUBJECT:
INSTRUMENTATION TO FOLLOW THE COURSE OF AN ACCIDENT (REGULATORY GUIDE 1.97)
Section 6.2 of Generic Letter 82-33 requested licensees to provide a report on their implementation of Regulatory Guide 1.97 (Revision 2), including methods for complying with the Commission's regulations and supporting technical justification for any proposed alternatives or deviations.
A large number of exception requests were received from pressurized water reactor (PWR) licensees asking that the environmental qualification requirement for accumulator level and pressure monitoring instrumentation be relaxed from Category 2 to Category 3, which would allow commercial grade instruments to be used.
Prior to 1987, these requests were denied by the staff.
Since then, these exceptions have been considered as an open item until a generic resolution can be found.
The staff has now reviewed the bases for these exceptions and has concluded that no operator action is based on this post-accident instrumentation and that it does not perform a safety function.
Since this instrumentation does not perform any post-accident safety function, its qualification re'quirements can be reduced to Category 3.
A copy of the Safety Evaluation is enclosed.
You have already installed Category 2 instrumentation to monitor accumulator level and pressure.
You are no longer bound by this commitment, and may, at your discretion, replace this instrumentation with Category 3 instrumentation.
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Hr. Gregory H. Rueger April 30, 1993 Please notify me of the actions you plan to take and, if appropriate, the schedule for implementation.
If you have any questions regarding this issue, please do not hesitate to contact me at (301) 504-1325.
Sincerely,
Enclosure:
Safety Evaluation cc w/enclosure:'ee next page Original signed by Sheri R. Peterson, Project Manager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation DISTRIBUTION.
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Mr. Gregory M. Rueger Please notify me of the actions you plan to take and, if appropriate, the schedule for implementation.
If you have any questions regarding this issue, please do not hesitate to contact me at (301) 504-1325.
Sincerely,
Enclosure:
Safety Evaluation cc w/enclosure:
See next page Sheri R. Peterson, Project Manager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Hr. Gregory H. Rueger Pacific Gas and Electric Company Diablo Canyon CC:
NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S..Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon Creston, California 93432 Ms. Nancy Culver San Luis Obispo Hothers for Peace P. 0.
Box 164 Pismo Beach, California 93448 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Cente}
San Luis Obispo, California 93408 Mr. Truman Burns Mr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Rm.
4102 San Francisco, California 94102 Mr. Steve Shu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Hr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Michael H. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Christopher J. Warner, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. John Townsend Vice President and Plant Hanager Diablo Canyon Power Plant P. 0.
Box 56 Avila Beach, California 93424 Diablo Canyon Independent Safety Committee ATTN:
Robert R. Wellington, Esq.
Legal Counsel 857 Cass Street, Suite D
Monterey, California 93940