ML16341E799
| ML16341E799 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/15/1988 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | Shiffer J PACIFIC GAS & ELECTRIC CO. |
| References | |
| IEB-88-009, IEB-88-9, NUDOCS 8809280062 | |
| Download: ML16341E799 (10) | |
Text
~E~ >5 1988 DISTRIBUTION NRC 8
LPDRs
'D5 Reading MVirgilio JLee HRood OGC (for info)
EJordan BGrimes Docket No. 50-323 t1r. J.
D. Shiffer, Vice President Nuclear Power Generation c/o Nuclear Power Generation, Licensing Pacific Gas and Electric Company 77 Beale Stre'et, Room 1451 San Francisco, California 94106 ACRS (10)
Dear Hr. Shiffer:
SUBJECT:
NRC BULLETIN NO. 88-09, "THIMBLE TUBE THINNING IN WESTINGHOUSE REACTORS" By letter dated August 26, 1988, Pacific Gas and Electric Company (PGIIE) requested schedular relief for Diablo Canyon Nuclear Power Plant, Unit 2, from the development and implementation of an inspection program to monitor thimble tube performance, prior to restart from its 1988 Cycle 2 refueling outage which is scheduled to begin in mid-September.
NRC Bulletin 88-09, "Thimble Tube Thinning in Westinghouse Reactors" dated July 26, 1988, required that such programs be developed and implemented prior to restart from the next cold shutdown outage of sufficient duration to allow the inspection.
PGIIE indicated that effective implementation of such an inspection program for Diablo Canyon Unit 2 would not be likely since insufficient time exists for the development of the program.
PGImE requested they be allowed to implement the inspection program for Diablo Canyon Unit 2 following the Cycle 2 refueling outage.
Based upon the low probability that a significant leak will develop over the next cycle, and the fact that the rate of makeup of reactor coolant by the charging system would exceed the rate of loss of reactor coolant resulting from a postulated failed thimble tube, we conclude that the delay in implemen-tation of an inspection program as requested by NRCB 88-09, until prior to startup from the Cycle 3 refueling outage will not be inimical to the health and safety of the public.
Your request is, therefore, approved.
Sincerely, cc:
See next page
- See previous concurrence George W. Knighton, Director Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects
- DRSP/PD5
- NRR/DOEA HRood:dr CRossi 9/14/88 9/14/88
- NRR/DEST JERichardson 9/15/88 DR ton 9/) /88 8809280062 880915 I
PDR ADOCK 05000323 9
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Docket No. 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 DISTRIBUTION NRC 5 LPDRs PD5 Reading MVirgilio JLee HRood OGC (for info)
EJordan BGrimes ACRS (10)
Dear Mr. Shiffer:
SUBJECT:
NRC BULLETIN NO. 88-09, "THIMBLE TUBE THINNING IN WESTINGHOUSE REACTORS" By letter dated August 26, 1988, Pacific Gas and Electric Company (PGSE) requested schedular relief for Diablo Canyon Nuclear Power Plant, Unit 2, from the development and implementation of an inspection program to monitor thimble tube performance, prior to restart from its 1988 Cycle 2 refueling outage which is scheduled to begin in mid-September.
NRC Bulletin 88-09, "Thimble Tube Thinning in Westinghouse Reactors" dated July 26, 1988, required that such programs be developed and implemented prior to restart from the next cold shutdown outage of sufficient duration to allow the inspection.
PGEE indicated that effective implementation of such an inspection program for Diablo Canyon Unit 2 would not be likely since insufficient time exists for the development of the program.
PGKE requested they be allowed to implement the inspection program for Diablo Canyon Unit 2 following the Cycle 2 refueling outage.
Based upon the observations that unacceptable thinning of thimble tubes does not typically occur during the first few cycles of operation (Diablo Canyon Unit 2 has been in operation for approximately 2-1/2 years) and that the ra
+r of makeup of reactor coolant by the charging system would exceed the rate of loss of reactor coolant resulting from a postulated failed thimble tube, we conclude that the delay in implementation of an inspection program as related NRCB 88-09, until prior to startup from the Cycle 3 refueling outage will not be -inimical to the health and safety of the public.
Your request is, therefore, approved.
Sincerely, cc:
See next page George W. Knighton, Director Project Directorate V
Division of Reactor Projects - III, IV, V and Special Projects DRS PD5 g /(f/88 DR g ton
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Docket No. 50-323 UNITEDSTATES NUCLEAR REGULATORYCOMMISSION WASHINGTON.D. C. 20555 SEP 15 1988 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:
NRC BULLETIN NO. 88-09, "THIMBLE TUBE THINNING IN WESTINGHOUSE REACTORS" By letter dated August 26, 1988, Pacific Gas and Electric Company (PG5E) requested schedular relief for Diablo Canyon Nuclear Power Plant, Unit 2, from the development and implementation of an inspection program to monitor thimble tube performance, prior to restart from its 1988 Cycle 2 refueling outage which is scheduled to begin in mid-September.
NRC Bulletin 88-09, "Thimble Tube Thinning in Westinghouse Reactors" dated July 26, 1988, required that such programs be developed and implemented prior to restart from the next cold shutdown outage of sufficient duration to allow the inspection.
PGSE indicated that effective implementation of such an inspection program for Diablo Canyon Unit 2 would not be likely since insufficient time exists for the development of the program.
PG&E requested they be allowed to implement the inspection program for Diablo Canyon Unit 2 following the Cycle 2 refueling outage.
Based upon the low probability that a significant leak will develop over the next cycle, and the fact that the raPe of makeup of reactor coolant by the charging system would exceed the rate of loss of reactor coolant resulting from a postulated failed thimble tube, we conclude that the delay in implemen-tation of an inspection program as requested by NRCB 88-09, until prior to startup from the Cycle 3 refueling outage will not be inimical to the health and safety of the public.
Your request is, therefore, approved.
Sincerely, cc:
See next page eorge W
Knighton rector Project Directora V
Division of Reactor Projects - III, IV, V and Special Projects
I
,4 i
s Mr. J.
D. Shiffer Pacific Gas end Electric Company.'
Diablo Canyon CC:
Richard F. Locke, Esq.
Pacific Gas G Electric Compan+
Post Office Box 7442 San Franc isco, Californi a 94120 Janice E. Kerr, Esq.
California Public Utilities Commission 350 NcAllister Street
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'an Francisco, California 94102 Ms. Sandra A. Silver 660 Granite Creek Road Santa Cruz, California 95065 Nr.
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 0
Mr. Leland N. Gustafson, Manager Federal Relations Pacific Gas and Electric Company 1726 N Street, N.
W.
Washington, DCO 20036-4502 Dian M. Grueneich Marcia Preston Law Office of Dian M. Crueneich 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 Nr. Dick Blakenburg 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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Pacific Gas
& Electric Company Diablo Canyon CC:
Ns. Laurie NcDermott, Coordinator Consumers Organized for Defense of Environmental Safety 731 Pacific Street, Suite 42 San Luis Obispo, California 93401 Nr. Jack NcGurk, Acting Chief Radiological Health Branch State Department of Health
'ervices 714 P Street, Office Building b8 Sacramento, California 95814 Regional Administrator, Region V
U.S. Nuclear Regulatory Commission 1450 Naria Lane Suite 210 Walnut Creek, California 94596 Ns.
Nancy Culver 192 Luneta Street San Luis Obispo, California 93401 President California Public Utilities Commission California State Building 350 NcAllister Street San Francisco, California 94102 Nichael N. Strumwasser, Esq.
Speci a l Ass istant Attorney Genera l State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010
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