05000272/LER-1982-068, Forwards LER 82-068/03L-0.Detailed Event Analysis Encl

Forwards LER 82-068/03L-0.Detailed Event Analysis Encl

ML20065F574
Person / Time
Site:	Salem
Issue date:	09/16/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20065F581	List: 05000272/LER-1982-068, Forwards LER 82-068/03L-0.Detailed Event Analysis Encl 05000272/LER-1982-068-03, /03L-0:on 820827,100-ft Elevation Containment Air Lock Declared Inoperable After Excessive Leakage Discovered Past Inner Door Seals.Caused by Closing Door W/Excessive Force.Seal Replaced.Installation of Snubbers Proposed
References
NUDOCS 8210010383
Download: ML20065F574 (3)

LER-1982-068, Forwards LER 82-068/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721982068R00 - NRC Website

text

,

O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, Neu Jersey 08038 Salem Generating Station September 16, 1982 Mr.

R. C.

Haynes Regional Administri. tor USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO.-DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 82.-068/03L Pursuant to the requirements of Salem Generating Station Unit No.

1, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-068/03L.

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

.3incerely yours, hf' H.

J.

Midura General Manager -

Salem Operations RH:ks[,/

CC:

Distribution gnon8sOSSE$g S

The Energy People p*

wn a2.9 a si

Q Report Number:

82-068/03L Report Date:

09-16-82 Occurrence Date:

08-27-82 Facility:

Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Containment Air Lock - 100' Elevation - Inoperable.

This report was initiated by Incident Report 82-261.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 35% - Unit Load 280 MWe.

DESCRIPTION OF OCCURRENCE:

At 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />, August 27, 1982, during performance of leak rate testing of the Containment 100' Elevation Air Lock, following maintenance, it was discovered that the inner door had excessive leakage past the seals.

The air lock was declared inoperable and Limiting Condition for Operation Action Statement 3.6.1.3 was entered at 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Prior to this occurrence, maintenance was performed on the air lock door operating mechanism to replace broken cam followers.

It is believed that the cause of this occurrence was personnel shutting the door with excessive force, which broke the cam followers and caused the door seal to partially leave its retaining groove.

Subsequent closure of the door cut the seal.

ANALYSIS OF OCCURRENCE:

The containment air lock doors allow for personnel access to the Containment Building while providing a redundant boundary as part of overall containment integrity.

This barrier prevents the release of radioactive contamination to the environment in the event of a design basis accident.

Since the outer door was maintained closed, providing containment integrity, no risk to the health and safety of the public was involved.

Therefore, this event constituted operation in a degraded mode permitted by a limiting condition for operation, and is reportable in accordance with Technical Specification 6.9.1.9.b.

2

T LER 82-068/03L -

ANALYSIS OF OCCURRENCE:~

Action Statement 3.6.1.3 requires:

With a containment air lock inoperable, restore the air lock 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 be in 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 />.

CORRECTIVE ACTION

As noted, the outer door was operable and maintained closed providing containment integrity.

The damaged seal was replaced, and the leak rate surveillance was satisfactorily performed.

The 100' elevation air lock was declared operable and Limiting Condition for Operation Action Statement 3.6.1.3 was terminated at 2115 hours0.0245 days <br />0.588 hours <br />0.0035 weeks <br />8.047575e-4 months <br />, August 27, 1982.

Proper operation of the air lock doors is presently addressed in radiation worker training.

In view of recurrent problems with air lock seals, special emphasis has been placed on the importance of closing the doors slowly.

Caution signs reminding personnel to operate the door slowly have been placed at each operating station.

Design Change Requests 2SC-0931 and 1SC-0930 have been submitted to have snubbers installed on the air lock doors of both units.

The purpose of these changes is to preclude shutting the doors with excessive force, and thereby eliminate the source of the recurrent problems that have been experienced.

FAILURE DATA:

Not Applicable.

/[h M W Prepared By R.

Heller Genefal Manager -

Salem Operations SORC Meeting No.

82-84 t

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