05000272/LER-1979-031-03, /03L-0 on 790329:100 Elevation Containment Personnel Air Lock Failed to Pass Leak Rate Test.Caused by Split Inner Door Seal Snagged by Some Object Passing Through Door.Seal Replaced

/03L-0 on 790329:100 Elevation Containment Personnel Air Lock Failed to Pass Leak Rate Test.Caused by Split Inner Door Seal Snagged by Some Object Passing Through Door.Seal Replaced

ML18079A215
Person / Time
Site:	Salem
Issue date:	04/27/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18079A214	List: 05000272/LER-1979-031, Forwards LER 79-031/03L-0 05000272/LER-1979-031-03, /03L-0 on 790329:100 Elevation Containment Personnel Air Lock Failed to Pass Leak Rate Test.Caused by Split Inner Door Seal Snagged by Some Object Passing Through Door.Seal Replaced
References
LER-79-031-03L, LER-79-31-3L, NUDOCS 7905040541
Download: ML18079A215 (2)

LER-1979-031, /03L-0 on 790329:100 Elevation Containment Personnel Air Lock Failed to Pass Leak Rate Test.Caused by Split Inner Door Seal Snagged by Some Object Passing Through Door.Seal Replaced

Event date:
Report date:
2721979031R03 - NRC Website

text

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Report Date:

Report Date:

Occurrence Date:

79-31/03L 4/27/79 3/29/79 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Containment Personnel Air Lock Elevation 100 Inoperable CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1 Reactor Power 100%

DESCRIPTION OF OCCURRENCE:

At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />, the containment personnel air lock elevation 100 failed to pass a leak rate test.

Technical Specification 3.6.1.3.b Action Statement was implemented.

Maintenance Department personnel repaired the inner door and surveillance 4.6.1.3 was performed to verify opera-bility.

The Action Statement was terminated at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The caus~ of this occurrence was a split inner door inner seal which appeared to have been snagged by some object passing through the door.

There was no other damage to the door sealing surface or operating mechanism.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.1.3 requires that with an air lock inoper-able, 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 at least hot standby within the next six hours and in cold shutdown within th~ following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

The air lock was repaired and returned to service within 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> and 30 minutes.

CORRECTIVE ACTION

The air lock inner door inner seal was replaced and the door was adjusted for a proper seal.

A satisfactory leak rate test was per-formed before returning the air lock to service.

FAILURE DATA:

Containment Personnel Air Lock Chicago Bridge & Iron Company Prepared by A. W. Kapple SORC Meeting No.

29-79 7905040~<-\\-\\

NRC~FORM 356 (7-77). '

LICENSEE EVENT REPORT e NUCLEAR REGULATURY COMMISSION CONTROL BLOCK: !--....._.....__....._ ____.___,J 0 (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 0

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_;~~~~ LlJG) I o I s I o I o I o I 2 I 7 I 2 101 o I 3 I 2 J 9 I 1 I 9 I© I o l 4 I 2 I 1 I 2 Jg. I G) 60 61 DOCKC:T NUMBER 68 69 EVENT OAT:

74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During normal operation, at 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />, the 100 elevation containment personnel air lock failed to pass a leak rate test.

The air lock was declared inoperable and the Action Statement for T/S 3.6.1.3 was implemented.

The inner door was repaired and surveillance 4.6.1.3 was performed to verify operability.

The air lock was returned to service at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> and the Action Statement was terminated.

This is

~ the fourth occurrence of this type.

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47 r1:l]J j The cause of this occurrence was a split inner door inner seal which appeared to havej D:IIJ been snagged by some object passing through the door.

No other damage to the door o::::IIJ I sealing surface or operating mechanism was detected.

The seal was replaced and the [JJ]J I door adjusted for a proper seal.

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