ML13324A712
| ML13324A712 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 08/28/1985 |
| From: | Morgan H Southern California Edison Co |
| To: | Martin J NRC/IE, NRC/RGN-V |
| References | |
| NUDOCS 8509160375 | |
| Download: ML13324A712 (2) | |
Text
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Southern California Edison Company 985 AUG 34 P1 12: 'r SAN ONOFRE NUCLEAR GENERATING STATION P.O. BOX 128 SAN CLEMENTE, CALIFORNIA 92672 RE;lGNV H. E. MORGAN TELEPHONE STATION MANAGER August 28, 1985 (714) 492-7700 U. S. Nuclear Regulatory Commission 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. 50-206 Special Report San Onofre Nuclear Generating Station, Unit 1 Pursuant to Section 6.9.3.f of Appendix A, Technical Specifications to Provisional Operating License No. DPR-13 for San Onofre Unit 1, this submittal provides the required Special Report for inoperable radiation monitoring instrumentation.
On August 14, 1985, at 0925, with Unit 1 at 93% power, the High Range West Main Steam Line Radiation Monitor R-1258B failed low and was removed from service. The preplanned alternate method of monitoring was initiated at 1311 in accordance with Limiting Condition for Operation (LCO) 3.5.10, Action Statement 27. The Low Range West Main Steam Line Radiation Monitor as well as both High and Low Range East Main Steam Line Radiation Monitors have remained operable. The cause of inoperability is currently under investigation.
Results of the investigation into cause of failure will be submitted in a revised report by October 15, 1985.
Radiation Monitor R-1258B is planned to be returned to service in September 1985.
8509160375 850828 PDR ADOCK 05000206 S
0I M-,r.
J. B. Martin
-2 Neither the health and safety of plant personnel nor the health and safety df the public was affected by this event. If you require additional information, please so advise.
Sincerely, 4JYY C cc:
F. R. Huey (USNRC Senior Resident Inspector, Units 1, 2 and 3)
U. S. Nuclear Regulatory Commission Document Control Desk Institute of Nuclear Power Operations (INPO)