ML20076C153
| ML20076C153 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/05/1983 |
| From: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| RO-83-079, RO-83-79, NUDOCS 8308220251 | |
| Download: ML20076C153 (2) | |
Text
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ifl!ED Southern California Edison Company
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SW S AN ONOFRE NUCLE AR GENER A TING ST A TION hf P.O. B O X 120 s A N C LEMEN T E. C A LIFOR NI A 92672
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tatre oNe August 5, 1983 it. TON.N....
U.S. Nuclear Regulatory Comission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention:
Mr. J.B. Martin, Regional Administrator
Dear Sir:
Subject:
Docket No. 50-361 Pronpt Report Licensee Event Report No.83-079 San Onofre Nuclear Generating Station, Unit 2 Pursuant to Section 6.9.1.12.b of Appendix A, Technical Specifications to Facility Operating License NPF-10 for San Onofre Unit 2, this submittal provides the written confirmation of our August 4, 1983, notification to the NRC of a reportable occurrence involving a Containment Isolation valve.
On August 4, 1983, at 0501 while Unit 2 was in Mode 1, an operator tried to shut the Containnent Isolation Valve 2HV8249 (main steam relief header trap isolation valve). W e valve would not shut on this attempt. As a result the valve was declared inoperable. Limiting Condition for Operation (ILO) 3.6.3 requires, among other things, the maintenance of at least one operable isolation valve in each penetration. Since there is no other valve in this
' penetration, this requirement could not be met and LCO 3.0.3 was invoked. We valve was closed and operability of the valve position indication verified.
Accordingly, the valve was declared operable at 0530 and LCO 3.0.3 was exited.
A 14-day follow-up report and copy of Licensee Event Report (LER) No.83-079
.will be suhaitted by August 19, 1983, to address this event.
If there are any questions regarding the above, please contact me.
Sincerely,
/
V 8308220251 830805
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r 2-August 5, 1983 Mr. J.B. Martin oc:
A.E. Chaffee (USNRC Resident Inspector, Units 2 and 3)
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