05000361/LER-1982-041, Forwards LER 82-041/03L-0.Detailed Event Analysis Submitted

Forwards LER 82-041/03L-0.Detailed Event Analysis Submitted

ML20062H737
Person / Time
Site:	San Onofre
Issue date:	08/05/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20062H739	List: 05000361/LER-1982-041, Forwards LER 82-041/03L-0.Detailed Event Analysis Submitted 05000361/LER-1982-041-03, /03L-0:on 820423,containment Air Lock Outer Door Seal Failed on Local Leak Rate Test.Caused by Dirt & Foreign Matter.Sealing Surfaces Cleaned & Testing Successfully Completed
References
NUDOCS 8208160149
Download: ML20062H737 (2)

LER-1982-041, Forwards LER 82-041/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3611982041R00 - NRC Website

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S AN ONOFRE NUC LE AR GENER A TING S T A TION P.o. so m t a s S AN C LEMENTE, C A LIFORNI A 92672 H. B. R AY

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August 5, 1982

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l U.S. Nuclear Regulatory Commission i

Office of Inspection and Enforcement Region V 4

1450 Maria Lane, Suite 210 l

Walnut Creek, California 94596-5368 Attention:

Mr. R. H. Engelken, Regional Administrator

Dear Sir:

Subject: Docket No. 50-361 30-day Report Licensee Event Report No.82-041 San Onofre Nuclear Generating Statlon, Unit 2

Reference:

Letter, H. B. Ray (SCE) to R. H. Engelken (NRC),

dated July 2,1982 The referenced letter confirmed our prompt notification of your office of our f ailure to provide Licensee Event Reports (LER's) within 30 days of the dates upon which the event had occurred.

Pursuant to Technical Specification 6.9.1.13.b, to Operating License NPF-10 for San Onof re Unit 2, this submittal provides the required 30-day written report and completed LER form, for an event involving Surveillance Requirement 4.6.1.3.a on the Containment Air Lock.

On April 23, 1982, while operating in Mode 4, the Containment Personnel Air Lock was declared inoperable due to the outer door falling the local leak rate test required by Surveillance Requirement 4.6.1.3.a.

The inner door was maintained closed and immediate action was taken to clean the door sealing surfaces and repeat the local leak rate test. A successful door seal leak rate test was completed within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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F4r. R. H. Engelken August 5, 1982 Since this event, Amendment 4 to the San Onofre Unit 2 Operating License has revised Surveillance Requirement 4.6.1.3.a to permit a leak rate of "up to.0lla" by flow measurement test, in lieu of "no detectable leakage" by pressure drop measurement.

Implementation of this test is underway and we anticipato no recurrence of this event as a result.

If there are any questions, please contact me.

Sincerely, f N[A44 Enclosure: LER 82-041 cc:

A. E. Chaffee (USNRC Resident inspector, San Onofre Unit 2)

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Of fice of f4anagement Information & Program Control institute of Nuclear Power Operations