05000361/LER-1982-105, Forwards LER 82-105/03L-0.Detailed Event Analysis Submitted

Forwards LER 82-105/03L-0.Detailed Event Analysis Submitted

ML20027C160
Person / Time
Site:	San Onofre
Issue date:	09/30/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20027C161	List: 05000361/LER-1982-105, Forwards LER 82-105/03L-0.Detailed Event Analysis Submitted 05000361/LER-1982-105-03, /03L-0:on 820831,during Mode 2 Operation,Auxiliary Feedwater Pump 2P-504 Declared Inoperable.Caused by Leaky Threaded Plug on Pump Discharge Casing.Threads Cleaned, Graffoil Applied & Plug Reinstalled
References
NUDOCS 8210130499
Download: ML20027C160 (2)

LER-1982-105, Forwards LER 82-105/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3611982105R00 - NRC Website

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testowoNe Septaber 30, 1982 U. S. Nuclear Regulatory Commission Of fice of Inspection and Enforement Reglon V 1450 huria Lane, Suite 210 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.82-105 San Onof re Nuclear Generating Station,. Unit 2 Pursuant to Section 6.9.1.13b of Appendix A, Technical Specifications to Operating License NPF-10, for San Onofre Unit 2, this submittal provides the required 30-dey written report and copy of Licensee Event Report

( LER) for an occurrence involving the Auxillary Feedwater ( AFW) Systs.

Limiting Condition for Operation (LCO) 3.7.1.2 requires three independent steam generator auxiliary f eedwater pumps and associated flow paths to be operable in Modes 1, 2 and 3.

On August 31,1982 at 1125 while in Mode 2, the motor-driven AFW pump 2P-504 was declared inoperable and LCO 3.7.1.2 Action Statement a was entered. The Action Statement requires the inoperable AFW Train to be returned to service within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or cooldown must be initiated.

Pump 2P-504 was taken out of service because of the discovery of a !eaky threaded plug on the pump discharge casing. Corrective action included cleaning of the threads, applying graf foil and reinstalling the plug.

The pump was returned to service on September 1,1982, thus satisfying LCO 3.7.1.2.

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u R. H. : Engel ken September 30,.1982 Measures taken successfully ellralnated -the leak and no additional corrective measures are required.

Public health and safety was not affected by.this event since any one of the two remaining operable AFW Trains would have performed its intended

' decay heat removal function, if called.upon to do so.

LER 82-105 (attached).

addresses this event.

If there are any questions, please contact me.

Sincerely, (L

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Enclosure:

LER 82-105 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 Office of Management Information & Program Control Institute of Nuclear Power Operations l

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