ML19257B106
| ML19257B106 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/31/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Arenal A SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 8001150258 | |
| Download: ML19257B106 (1) | |
Text
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'o UNITED STATES E }*).fq '
NUCLEAR REGULATORY COMMISSION o, ' d'd
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1990 N. CALIFORNI A BOULEVARD
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SUITE 202, WALNUT CREEK PLAZA WALNUT CREEK, CALIFORNIA 94596 December 31, 1979 Docket flos. 50-206, 50-361, 50-362 Southern California Edison Company P. O. Box 800 2244 Walnut Grove Avenue Rosemead, California 91770 Attention: Mr. A. Arenal, Vice President Advanced Engineering Gentlemen:
The enclosed IE Information Notice No. 79-35 provides information on the control of maintenance and essential equipment.
Sincerely, micC~
R. H. Engelken Director
Enclosure:
IE Information Notice No. 79-35 cc w/ enclosure:
J. M. Curran, SCE J. T. Head, SCE J. H. Drake, SCE 1749 124 8 0 0115 0 2 5F
UtlITED STATES SSIris flo.:
6870 flUCLEAR REGULATORY C0f1MISSI0fl Accessions flo.:
0FFICE OF INSPECTI0tl AND EflFORCEMErlT 7910250510 WASHIllGTON, D.C.
20555 December 31, 1979 IE Information flotice flo. 79-35 CONTROL OF f4AINTEtlA!!CE AND ESSENTIAL EnUIPMErlT Description of Circumstances:
Enclosed is a copy of a recent enforcement action against Duauesne Light Company.
A cony of this action is beina forwarded to all utilities with a power reactor operatina license or a construction permit. This is being done to apprise you of a serious condition which revealed an apparent weakness in facility control of maintenance and essential equipment.
You,hould review your existing procedures and control for independent verification of operability of redundant counterpart equipment when an essential component, subsystem, or system is determined inoperable. Operability is defined as follows:
A system, subsystem, train, component or device shall be OPERABLE or have OPERABILITY when it is capable of performing its specified function (s).
Implicit in this definition shall be the assumption that all necessary attendant instrumentation, controls, normal and emergency electrical power sources, coolino or seal water, lubrication or other auxiliary eauipment that are required for the system, subsystem, train, comoonent or device to perform its function (s) are also capable of performing their related support function (s).
If you have any questions regardina this matter, please contact the Director of No written response the flRC Regional Office in which your facilities are located.
to this IE Information flotice is required.
Enclosures:
1.
Letter to Duauesne Liaht Company from V. Stello, Jr., dtd.12/5/79 2.
Recently Issued IE Information flotices DUPLICATE DOCUMENT Entire document previously entered into system under:
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