ML20004G088
| ML20004G088 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 06/18/1981 |
| From: | Schuyler J PACIFIC GAS & ELECTRIC CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| IEB-79-28, NUDOCS 8106290160 | |
| Download: ML20004G088 (2) | |
Text
e, PACIFZC GAS AND E LE.C)'T RI C C O M PANY g] i,' f s,1;.,
hE E,3f. 3157 (LM)R, S A N F R A N CIS CO, C A LIFO R NI A 94106 77 BEAL P. O. Box 744 2 1PGeE y
T ELEPHO N E (415) 7 814 211
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T ELEcopiER (415) 543 7813
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Mr. R. H. Engelken, Director Office of Inspection and Enforement Region V U. S. Nuclear Regulatory Camnssion 1990 North ('*aH fornia Boulevard C
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i Walnut Creek Plaza, Snite 202 Walnut Creek, CA 94596 3;H JUN 2 61981
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% w m====pf Re: Docket No. 50-275 comaa Docket No. 50-323
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Diablo Canycn Units 1 and 2 g
Dear Mr. Engelken:
6 This letter updates our January 28, 1980 response to IE Bulletin 79-28 and provides a current description of PGandE actions required by this bulletin. The bulletin requires corrective actica for safety-related Namco limit switches with date codes between 02-79 and 08-79.
Following cur January 28, 1980 letter, PGandE deternu.ned frcm a u lkdown of Diallo Canycn Units 1 and 2 that there are nine safety-related Namco limit switches date W 04-79 in Unit 1 ard twelve in Unit 2.
This total nucber of switches (21) differs frcm the number (27) previously wim Led. Since our January 28, 1980 letter, six entire Namco switch asse-blies w re replaced with units date coded later than 08-79. There are no I
other safety-related Namco limit switches with date codes between 02-79 ard i
08-79 at Diablo Canyon. As required by IE Bulletin 79-28, tcp cover gaskets for the switches in Unit 1 have been replaced ard no further action is necessary.
Pequired carrective action for the Unit 2 switches is in progress.
As was the case with Unit 1, the number of switches identified as requiring gasket replacment in Unit 2 (12) could be reduced if same of these switch f.
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- a 2-June 17, 1981 Mr. R. H. Engelken ass ablies are replaced with units date coded later than 08-79. PGandE will subnit a final report when the Unit 2 corrective action has been cc:pleted.
I an authorized to sign and file this subnittal with the NPC, and the matters set forth herein are true and correct to the best of my knowledge and belief.
Very trulv J. O. SChWLER Subscribed and sworn to before me this 17th day of June, 1981.
Mc RITA J. GREEN i
Qy fl0TATI Fiftti;. CALIFORNIA Q
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CITY A:43 COUNTY OF f
i S.*d4 FRAfJCISCO My Commission Dpres July 16,1983 Rita J. Green, Notary lic in and for cccccccccc.v.:o..c::occ%-g3 the City and County of San Francisco, State of California My Camussion expires July 16, 1983.
Pobert Ohlbach Philip A Crane, Jr.
Attorneys for Pacific Gas ad ectric Ccupany By L/1 Y(iffl' Philip A Crane, Jr.
CC:.@irector Office of Inspection and Enforement U. S. Nuclear Pegulatory Ccmnission Washington, D. C. 20555 6ervice List O
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