05000311/LER-1981-122, Forwards LER 81-122/03L-0.Detailed Event Analysis Encl

Forwards LER 81-122/03L-0.Detailed Event Analysis Encl

ML20039C266
Person / Time
Site:	Salem
Issue date:	12/16/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20039C267	List: 05000311/LER-1981-122, Forwards LER 81-122/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-122-03, /03L-0:on 811119 & 1207,leakage Rate Exceeded Limit at 130-ft Elevation Containment Air Lock.Caused by Misalignment of Inner Door Latch Mechanism & Failure of Latch Bearing.Latch Bearing Replaced
References
NUDOCS 8112290148
Download: ML20039C266 (3)

LER-1981-122, Forwards LER 81-122/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981122R00 - NRC Website

text

I

~

O PSIEG c=-

xD,.....,,

~

~

D c Sers ce E ectra arc Gas Comcany P O Ec= =i68 Hanccc s Br cge Ne.v Jersey C8038 December 16, 1981

_n Ci s

Mr.

R.

C.

Haynes s

Director of USNRC RECElVED office of Inspection and Enforcement Region 1 S}

DEC28198;5 73 631 Park Avenue c%

?

M,p King of Prussia, Pennsylvania 19406 amor g

9

Dear Mr. Haynes:

m LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-122/03L Pursuant to the requirements of Salem Generating Station Unit No.

2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-122/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours,

/

.h Lftlb^ ~V H.

J. Midura General Manager -

Salem Operations CC:

Distribution L}h 81A2290148 811216 I

f' l PDR ADOCK 05000311 7

5 PDR t

The Energy People J

e

Report Number:

81-122/03L Report Date:

12-16-81 Occurrence Date:

11-19-81 and 12-7-81 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Containment Air Lock - Inoperable.

This report was initiated by Incident Reports81-468 and 81-491.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 91% - Unit Load 1040 MWe DESCRIPTION OF OCCURRENCE:

On two occa'sions, November 19 and December 7, 1981, while performing surveillance procedure SP (O) 4.6.1. 3 on the 130' elevation containment air lock, it was determined that the leakage rate exceeded the limit of 0.05 La at the design pressure of 47.0 PSIG as required by Technical Specification 3.6.1.3.b.

At 0100 and 1945 hours0.0225 days <br />0.54 hours <br />0.00322 weeks <br />7.400725e-4 months <br />, respectively, the air lock was declared inoperable and Action Statement 3.6.1.3.a was entered.

This occurrence constituted operation in a degraded mode in accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The air lock did not seal properly due to misalignment of the inner door latch mechanism and failure of a latch bearing.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.1.3.a requires:

With one air lock door inoperable, maintain at least the operable air lock door closed and either restore the in-operable air lock door to operable status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or lock the operable air lock door closed; otherwise, be in at least hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

LER 81-122/03L dORRECTIVE ACTION:

On November 19 the failed latch bearing was replaced; and on December 7 the door latch was properly readjusted.

Surveillance procedure SP(O) 4.6.1.3 was satisfactorily performed, and at 1542 and 2235 hours0.0259 days <br />0.621 hours <br />0.0037 weeks <br />8.504175e-4 months <br />, respectively, Action Statement 3.6.1.3.a was terminated.

FAILURE DATA:

Chicago Bridge and Iron Company Containment Air Lock Latch Bearing IBCIR-8407

.)

Ic W Prepared By F. Dickey 9,

General 41anager -

Salem Operations SORC Meeting No.81-127 1

?

}