ML16341E957
| ML16341E957 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/06/1989 |
| From: | Rood H Office of Nuclear Reactor Regulation |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16341E958 | List: |
| References | |
| GL-83-28, TAC-53171, TAC-61721, NUDOCS 8901190225 | |
| Download: ML16341E957 (8) | |
Text
~'anuary 6,
1989 Docket Nos.:
50-275 and 50-323 Nr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Nr. Shiffer:
DISTRIBUTION
~NRC Im LPDRs HRood NVirgilio JLee OGC (for informati on only)
PDV Reading File EJordan BGrimes ACRS (10)
DLasher
SUBJECT:
SAFETY EVALUATION FOR GENERIC LETTER 83-28, ITEN 4.3, AUTONATIC ACTUATION OF SHUNT TRIP FOR REACTOR TRIP BREAKERS FOR DIABLO CANYON UNITS 1 AND 2 (TAC NOS.
53171AND 61721)
The purpose of this letter is to forward the NRC staff's safety evaluation (SE) on modifications made at Diablo Canyon to improve the reliability of the reactor trip system.
This was accomplished by installing circuitry to automatically actuate the reactor trip breaker shunt trip attachment.
The enclosed SE finds the installation to be acceptable.
By letter dated December 20, 1983, you made a commitment to install the
'eneric modifications proposed by the Westinghouse Owner's Group to achieve automatic actuation of the reactor trip breaker shunt trip attachment.
Your letter also responded to 13 plant-specific issues identified in the NRC staff',s August 10, 1983 SER on the generic Westinghouse design.
On Nay 16, 1984, the staff issued an SER evaluating the plant-specific aspects of the installation of an automatic shunt trip at Diablo Canyon.
In the Nay 16, 1984 SER, the staff found the Diablo Canyon installation to be acceptable, but identified five plant-specific issues that had not been resolved at that time.
By letters dated Nay 24, 1984; June 6, 1984; June 27, 1984; November 7, 1984; December 6, 1985; November 20, 1986; and December 9, 1988, you satisfactorily addressed these issues.
Our SE documenting this is enclosed.
This action completes our review and evaluation of Item 4.3 of Generic Letter 83-28.
Please contact us if you have any questions regarding this evaluation.
This completes our efforts on TAC Nos.
53171 and 61721.
S incerely, 8+0>>90225 890106 PDR ADOCK 05000275 P
PNU
Enclosure:
Safety Evaluation cc w/ nclosures:
See next D
D5 DRSP/PD
'JLee HRood 01/g/89
" '1/( /8 OFFICIAL 'RECORD COPY original signed by Harry Rood, Senior Project Nanager Project Directorate V
'Division of Reactor Projects - III, IV, V and Special Projects
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++*++
UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 January 6, 1989 Docket Nos.:
50-275 and 50-323.
Mr. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Street, Room 1451 San Francisco, California 94106
Dear Mr. Shiffer:
SUBJECT:
SAFETY EVALUATION FOR GENERIC LETTER 83-28, ITEM 4.3, AUTOMATIC ACTUATION OF SHUNT TRIP FOR REACTOR TRIP BREAKERS FOR DIABLO CANYON UNITS 1 AND 2 (TAC NOS.
53171 AND 61721)
The purpose of this letter is to forward the NRC staff's safety evaluation (SE) on modifications made at Diablo Canyon to improve the reliability of the reactor trip system.
This was accomplished by installing circuitry to automatically actuate the reactor trip breaker shunt trip attachment.
The enclosed SE finds the installation to be acceptable.
By letter dated December 20, 1983, you made a commitment to install the generic modifications proposed by the Westinghouse Owner's Group to achieve automatic actuation of the reactor trip breaker shunt trip attachment.
Your
. letter also responded to 13 plant-specific issues identified in the NRC staff's August 10, 1983 SER on the generic Westinghouse design.
On May 16, 1984, the staff issued an SER evaluating the plant-specific aspects of the installation of an automatic shunt trip at Diablo Canyon.
In the May 16, 1984 SER, the staff found the Diablo Canyon installation to be acceptable, but identified five plant-specific issues that had not been resolved at that time.
By letters dated May 24, 1984; June 6, 1984; June 27, 1984; November 7, 1984; December 6, 1985; November 20, 1986; and December 9, 1988, you satisfactorily addressed these issues.
Our SE documenting this is enclosed.
This action completes our review and evaluation of Item 4.3 of Generic Letter 83-28.
Please contact us ifyou have any questions regarding this evaluation.
This completes our efforts on TAC Nos.
53171 and 61721.
Sincerely,
Enclosure:
Safety Evaluation cc w/enclosures:
See next page Harry Rood, Senior Project Manager Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects
Mr. J.
D. Shiffer Pacific Gas and Electric Company Diablo Canyon CC:
Richard F. Locke, Esq.
Pacific Gas 5 Electric Company Post Office Box 7442 San Francisco, California 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 McAllister Street San Francisco, California 94102 Ms. Sandra A. Silver 660 Granite Creek Road Santa Cruz, California 95065 Mr.
W. C. Gangloff Westinghouse Electric Corporation P. 0.
Box 355 Pittsburgh, Pennsylvania 15230 Managing Editor San Luis Obispo County Telegram Tribune 1321 Johnson Avenue P. 0.
Box 112 San Luis Obispo, California 93406 Hr. Leland H. Gustafson, Manager Federal Relations Pacific Gas and Electric Company 1726 M Street, N.
W.
Washington, DC 20036-4502 Dian M. Grueneich Marcia Preston Law Office of Dian M. Grueneich 380 Hayes Street, Suite 4
San Francisco, California 94102 NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.
Box 369 Avila Beach, California 93424 Mr. Dick 8 1 a kenburg Editor 5 Co-Publisher South County Publishing Company P. 0.
Box 460 Arroyo Grande, California 93420 Bruce Norton, Esq.
c/o Richard F. Locke, Esq.
Pacific Gas and Electric Company Post Office Box 7442 San Francisco, California 94120 Dr. R. B. Ferguson Sierra Club - Santa Lucia Chapter Rocky Canyon Star Route Creston, California 93432 Chairman San Luis Obispo County Board of Supervisors Room 270 County Government Center San Luis Obispo, California 93408 Director Energy Facilities Siting Division Energy Resources Conservation and Development Commission 1516 9th Street Sacramento, California 95814 Ms. Jacquelyn Wheeler 3033 Barranca Court San Luis Obispo, California 93401
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~ i Pacific Gas 8 Electric Company Diablo Canyon CC:
Ms. Laurie McDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401 Mr. Jack McGurk, Acting Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building 18 Sacramento, California 95814 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Malnut Creek, California 94596 Ms. Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 President California Public Utilities Coaeission California State Building 350 McAllister Street San Fr ancisco, California 94102 Michael M. Strumwasser, Esq.
Special Assistant Attorney General State of California Department of Justice 3580 Ri lshire Boulevard, Room 800 Los Angeles, California 90010
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