ML16341G240
| ML16341G240 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 08/22/1991 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| References | |
| GL-88-17, TAC-69740, TAC-69741, NUDOCS 9108290189 | |
| Download: ML16341G240 (8) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 August 22, 1991 Docket Nos.
50-275 and 50-323 Mr. J.
D. Shiffer Senior Vice President Nuclear Power Generation Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Mr. Shiffer:
SUBJECT:
CLOSEOUT OF GENERIC LETTER 88-17, "LOSS OF DECAY HEAT REMOVAL,"
FOR DIABLO CANYON UNITS 1
AND 2 (TAC NOS.
69740 AND 69741)
Generic Letter (GL) 88-17 addressed the potential for loss of decay heat removal (DHR) during non-power operation.
In GL 88-17, the staff requested (1) a description of your efforts to implement the eight recommended expeditious actions of the GL and (2) a description of the enhancements, specific plans and a schedule for implementation of the six recommended program enhancements.
The Pacific Gas and Electric Company (PG5E) responded to GL 88-17 with regard to Diablo Canyon by letters dated January 6,
1989 and February 6, 1989.
The January 6,
1989 letter described PGSE's expeditious actions, and the February 6,.1989 letter described PGSE's programmed enhancements.
Additionally, PG5E notified the NRC staff by letter dated May 31, 1991 that all programmed enhancements at Diablo Canyon have been implemented.
By letter dated April 26, 1989, the NRC staff approved PGSE's expeditious actions.
The NRC staff has now completed its review of PG5E's programmed enhancements at Diablo Canyon.
We find that your response is generally complete and appears to meet the intent of GL 88-17.
The tabulation in the summary table of your February 6, 1989 letter was helpful to differentiate between completed and planned program enhancements.
The correlation of the operating procedures with pertinent criteria was helpful in determining that specific actions are covered.
A number of your responses indicated that you planned to factor in the results of studies that were at that time being performed by the Westinghouse Owners Group.
Since these were not all completed and incorporated at the time of your submittal we could not determine their effect on the final modifications to the programmed enhancements.
There is no need to respond to this observation.
9108290i89 9i0822 PDR ADOCK 050002'75
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D. Shiffer Pacific Gas and Electric Company Diablo Canyon As you know, the expeditious actions you described in your letter of January 6,
1989 were interim measures to achieve an immediate reduction in the risk associated with reduced inventory operation, and these are to be supplemented by, and in some cases, replaced by the programmed enhancements.
Your letter of Nay 31, 1991 indicates that all programmed enhancements have been implemented within the schedule required by GL 88-17.
The NRC staff intends to audit the Diablo Canyon programmed enhancement program at some future time.
The effect of the WOG studies on the final modifications made to the programmed enhancements may be covered in the audit of your programmed enhancements.
This completes our review of this issue at this time and closes TAC Numbers 69740 and 69741.
If you have any questions regarding this issue, please contact me.
S incere ly, Harry Rood, Senior Project Hanager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation CC:
See next page
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D. Shiffer Paci fic Gas and E1 ectri c Company Diablo Canyon CC:
Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Richard F. Locke, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Franci sco, Gal iforni a 94120 Mr. John Hickman Senior Health Physicist Environmental Radioactive Mgmt. Unit Environmental Management Branch State Department of Health Services 714 P Street, Room 616 Sacramento, California 95814 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Managing Editor The Count Tele ram Tribune 1
1 o nson venue P. 0.
Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Ms. Sandra A. Silver Mothers for Peace 660 Granite Creek Road Santa Cruz, California 95065 Dr. R. B. Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon Creston, California 93432 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 Ms. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401
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Mr. J.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon As you know, the expeditious actions you described in your letter of January 6,
1989 were interim measures to achieve an immediate reduction in the risk associated with reduced inventory operation, and these are to be supplemented by, and in some cases, replaced by the programmed enhancements.
Your letter of llay 31, 1991 indicates that all programmed enhancements have been implemented within the schedule required by GL 88-17.
The NRC staff intends to audit the Diablo Canyon programmed enhancement program at some future time.
The effect of the WOG studies on the final modifications made to the programmed enhancements may be covered in the audit of your programmed enhancements.
This completes our review of this issue at this time and closes TAC Numbers 69740 and 69741.
If you have any questions regarding this issue, please contact me.
Sincerely, Original signed by:
Harry Rood, Senior Project Manager Project Directorate V
Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation CC:
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