05000312/LER-1981-037, Forwards LER 81-037/03L-0.Detailed Event Analysis Submitted

Forwards LER 81-037/03L-0.Detailed Event Analysis Submitted

ML20010B667
Person / Time
Site:	Rancho Seco
Issue date:	08/07/1981
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010B668	List: 05000312/LER-1981-037, Forwards LER 81-037/03L-0.Detailed Event Analysis Submitted 05000312/LER-1981-037-03, /03L-0:on 810707,during Surveillance Test, Isolation Valve Failed to Close within Tech Spec Limit. Apparently Caused by Foreign Matl in Air Discharge Port.Port Cleaned & Valve Operated Properly
References
NUDOCS 8108170386
Download: ML20010B667 (1)

LER-1981-037, Forwards LER 81-037/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3121981037R00 - NRC Website

text

a suun SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452 3211 August 7, 1981 m

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_i R H ENGELKEN, DIRECTOR

__, 9j lG REGION V 0FFICE OF INSPECTION & ENFORCEMENT y

U S NUCLEAR REGULATORY GMMISSi')N 1990 N CALIFORNIA BLVL, 4

UALNUT CREEK PLAZA, SUITE 202 WALNUT CREEK CA 94596 q

DOCKET NO. 50-312 LICENSE NO. DPR-54 REPORTABLE OCCURRENCE 81-37 In accordance with Technical Specification Section 6.9.4.2.b, the Sacramento Municipal Utility District hereby submits a thirty-day repc.

• af Reportable Occurrence 81-37 On July 7, 1981, during performance of SP 205.07A, Isolation Valve Surveillance Test, HV-20593, the OTSG-A Sample Line isolation Valve closed in 12.9 seconds, exceeding the allowable limit of 12 seconds.

In accordance with Technical Specification Section 3.6.6, HV-20593 was closed until repai rs could be made.

The valve is a pneumatically operated globe valve, Fisher Governor model 667-ES, with an Asco controller.

Foreign material, which appeared to be desiccant f rom the ai r driers, was found in the air discharge port.

When it was removed, the valve was retested and closed in 10.5 seconds.

This and all other safety related, pneumat-ically operated valves will continue to be monitored and tested to assure proper operation.

The reactor operated at full power, with no transients or power reductions associated with this event.

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