05000206/LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted

Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted

ML20031A497
Person / Time
Site:	San Onofre
Issue date:	09/11/1981
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20031A498	List: 05000206/LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted 05000206/LER-1981-019-03, /03L-0:on 810816 & 25,seal Water Line to North Charging Pump Outboard Seal Found Leaking in Excess of Tech Spec Limits.Caused by Svc Induced Wear on Threaded Joint of Seal Water Line.Joint Tightened
References
NUDOCS 8109230573
Download: ML20031A497 (2)

LER-1981-019, Forwards LER 81-019/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
2061981019R00 - NRC Website

text

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ESCswa tmc Southern California Edison Company p,4 Mi 9 Or>SW s AN ONOPRE NUCLE AM GENER ATING sT ATION p.O. sO x t a s s&N C LEMENTE. C ALIFORNI A s2672 H. 8. R AY vetapwCNs

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September 11, 1981 fL U. S. Nuclear Ibgulatory Comnission f

A Office of Inspection and Enforcement q

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1990 North California Boulevard ji 87 Suite 202, Walnut Creek Plaza p

Walnut Creek, California 94596 yg Attention: Mr. R. H. Engelken, Director DOCKET No. 50-206 SAN CNOFRE-UNIT 1

Dear Sir:

Wis letter describes a reportable occurrence involving leakage frtrn the recirculation loop outside the containment. Subnittal is in accordance with the reporting requirements of Section 6.9.2.b of Appendix A to Provisional Operation License DPR-13.

On August 16, 1981, during routine power operations, it was noticed by local oparator inspection that the seal water line to the north charging ptmp outboard seal was leaking in excess of Technical Specificaticn 3.3.1.A(4) limits. In accordance with Technical Specification require-ments, the leak was reduced to acceptable limits within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. Leak reduction was achieved by tightening down on the seal water line connec-tion. h e punp remained operable during this occurrence.

On August 25, 1981, during routine power operations, a leak in excess of Technical Specification limits cn the same seal water line connecticn was again noticed by operator observation. In accordance with Technical Specification requirements, the leak was repaired within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The connection was fillet welded to the applicable ANSI B31.1 (1980) require-ments such that there was no visible leakage. %e north charging ptmp was operable except while valved out during the weld repair, at which time the south charging ptmp was in operation.

YS Subsequent investigation into the cause of the leak attributed it to g

service induced wear on the threaded joint of the seal water line.

Were was no detectable damage to the north charging punp as a result of

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this incis it.

8109230573 810911i PDR ADOCK 05000206 S

PDR

A U. S. Nuclear Rxjulatory Comnission 'Ibere was no alverse affect on the public health or safety.

If you have any questions, or desire further information on this Intter, please contact me.

Very Truly Yours, PBK:akp Enclosure: Licensee Event Report 81-019 cc:

U. S. Nuclear Regulatory Comnission Office of Inspection and Enforcement U. S. Nuclear Regulatory Comnission Office of Managenent Information & pro tau Control (MIPC) 9 Nuclear Safety Analysis Center L. F. Miller (USNBC San Onofre Unit 1 Resident Inspector) l l

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