ML19031B517

No. 1 - Licensee Event Report 1978 for Reportable Occurrence 78-28/03L Re Inoperable 100 Ft. Elevation Air Lock Interior Door

ML19031B517
Person / Time
Site:	Salem
Issue date:	06/30/1978
From:	Librizzi F Public Service Electric & Gas Co
To:	Grier B NRC/IE, NRC Region 1
References
LER 1978-028-03L
Download: ML19031B517 (4)

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tdUbt[i;j ffl£ Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Ph~ne 2~gJ!Mrooo

\ June 30, 1978 Mr. Boyce H. Grier Director of USNRC Cl Off ice of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

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(./) t_~l LICENSE NO. DPR-70 \YI DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-28/03L 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 78-28/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

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F. P. Li rizz.i General Manager -

Electric Production CC: Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) 7f: 1 ::::70:31 7

.Report Number:

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• 78-28/03L Report Date: 6/30/78 Occurrence Date: 6/8/78 Facility: Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURR,ENCE:

Inoperable 100 ft. Elevation Air Lock Interior Door CONDITIONS PRIOR TO OCCURRENCE:

Hot Standby: Mode 3 DESCRIPTION OF OCCURRENCE:

At 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />, during personnel entry into containment, a failure of the interior door on the 100 ft. elevation personnel airlock was identified. Exterior door was cleared and tagged in the closed.

position and Action Statement for LCO 3.6.l.3 was implemented.

Maintenance personnel investigated and found a broken cam follower.

The failed cam follower was replaced from spares and the door re-turned to operable status at 2045 hours0.0237 days <br />0.568 hours <br />0.00338 weeks <br />7.781225e-4 months <br />. Action Statement for LCO 3.6.1.3 was then terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Improper operation of the personnel airlock caused excessive stress on the cam follower resulting in shaft failure.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.1.3 states that with an.airlock inoper-able, restore the airlock 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 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 />. The elevation 100 ft. interior door was reworked and the .airlock returned to operable status in 10-1/2 hours. The unit remained in Mode 3 throughout this period.

CORRECTIVE ACTION:

Failed cam follower was replaced from spares and the airlock was tested satisfactory.

-- ' LER 78-28/03L To prevent further occurrences, the Chief Engineer has issued a memo to all department heads instructing them to retrain the members of their department on proper airlock operation.

FAILURE DATA:

Containment Personnel Airlock Manufacturer: Chicago Bridge & Iron Cam Follower Manufacturer: Smith Bearing Division*

Garwood; New Jersey PN: CR-lX Prepared by~~T_;_*.....;;;;L~.__;;S~p~e~n~c~e~r~~~~-

Manager - Salem Generating Statio1 SORC Meeting No.~~~3~7_-~7~8;.,_~-------

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.LICENSEE EVENT REPORT -

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~~~~~ LlJ© so I o I s I oI o I oI 2 I 1 I 2 101 o I 6 I o I aI 1 I a I© Io 61 OOCKETNUMBER 68 69 EVENT OATE 74 75 I 6 13 I o I 1 I a 10 REPORT DATE. ao EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES@

[))IJ I During containment personnel entry, a failure of the interior door on C2:JI] I the 100 ft. airlock was identified. Investigation revealed a failed

[ffi] cam follower. Exterior door remained closed throughout this event.

lIIIl This is the fifth event of this type.

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.7 8 9 10 11 . 12 1J 18 19 20 SEQUENTIAL. OCCURRENCE RSPORT REVISION

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J2 ACTION FUTURE EFFECT SHUTDOWN f.::\ ATTACHMENT NPR04 PRIME CDM.P. COMPONENT TAKEN ACTION ON PLANT METHOD . HOURS ~ SUBMITTED FORM :OUB. . SUPPL.I ER MANUFACTURER W@Ll!J@

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44 47 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS @

[II[] I Improper operation of the airlock caused a cam follower shaft failure.

Cam follower replaced. Personnel.will be retrained on proper airlock operation.

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F#r~fL-r  % POWER DISCOVERY DESCRIPTION ~

o::m OTHER STATUS \:::::; OISCOVERY

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REL.EASED OF RELEASE AMOUNT OF ACTIVITY~ L.OCATION OF REL.EASE @)

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