05000361/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Submitted

Forwards LER 82-038/03L-0.Detailed Event Analysis Submitted

ML20058D744
Person / Time
Site:	San Onofre
Issue date:	07/15/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20058D748	List: 05000361/LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Submitted 05000361/LER-1982-038-03, /03L-0:on 820615,remote Shutdown Boronometer Low Flow Alarm Could Not Be Cleared Following Actuation, Preventing Representative Sampling of Reactor Coolant for Boron Concentration.Caused by Stuck Flow Controller Float
References
NUDOCS 8207270341
Download: ML20058D744 (2)

LER-1982-038, Forwards LER 82-038/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3611982038R00 - NRC Website

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S AN ONOFRE NUCLE AR GENER A TING STA TION P.O. B O X 128

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Juiy 15, 1982

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STAT U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention:

Mr. R. H. Engelken, Regional Administrator U

Dear Sir:

Subject: Docket No. 50-361 30-day Report Licensee Event Report No.82-038 San Onofre Nuclear Generating Station, Unit 2 This letter describes a reportable occurrence involving the Remote Shutdown bbnitoring Instrumentation of Limiting Condition for Operation

( LCO) 3.3.3.5.

This submittal is in accordance with the reporting requirements of Section 6.9.1.13.b of Appendix A to Facility Operating License NPF-10.

Technical Specification 3.3.3.5 requires that table 3.3-9 item 7, the Reactor Coolant Boron Concentration instrument (Boronometer), be operable in Modes 1, 2, and 3.

While in Mode 3 on June 15, 1982, the Remote Shutdown Boronmeter Low Flow Alarm was actuated and could not be cleared. This constitutes unacceptable operation of the Boronometer, since the low flow condition will not permit representative sampling of Reactor Coolant for boron concentration.

l While in bbde 3, the action statement associated with this Limiting l

Condition for Operation requires only that the inoperable equipment be restored to operability within seven days. Operability of the Remote i

Shutdown Boronometer was reestablished on June 15, 1982, after cleaning and repairing the float valve on the flow device.

Had an accident requiring Control Room evacuation occurred while the Remote Shutdown Boronometer was inoperable, Reactor Coolant System boron i

concentration could only be determined by sampiing.

8207270341 820715 PDR ADOCK 05000361

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6 Mr. R. H. Engelken July 15, 1982 A completed LER form describing this event is enclosed.

Should you require additional information concerning this incident, please contact me.

Sincerely, f

Enclosure:

LER No.82-038 cc:

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Office of Management Information and Program Control Institute of Nuclear Power Operations Mr. A. E. Chaf fee (USNRC Resident inspector, San Onof re Unit 2)