05000272/LER-2078-003-03, Excessive Air Flow Upon Exit of Containment

Excessive Air Flow Upon Exit of Containment

ML19031B531
Person / Time
Site:	Salem
Issue date:	02/09/1978
From:	Librizzi F Public Service Electric & Gas Co
To:	Grier B NRC/IE, NRC Region 1
References
LER 1978-003-03
Download: ML19031B531 (4)

LER-2078-003, Excessive Air Flow Upon Exit of Containment

Event date:
Report date:
2722078003R03 - NRC Website

text

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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 February 9, 1978 Mr. Boyce H. Grier Director of USNRC Off ice of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-03/03L 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 78-03/03L.

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

Sincerely yours,

)~.

F. P. Librizzi General Manager -

Electric Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 Copies)

The Energy People

~.... : *:,. -. __.

95-2001 300M 10-74

_Report Number:

Report Date:

Occurrence Date:

Facility:

.. :.1 78-03/03L 1/11/78 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Inoperable Air Lock Inner Door CONDITIONS PRIOR TO OCCURRENCE:

Hot Standby -

Mode 3 DESCRIPTION OF OCCURRENCE:

~.

At 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />, Health Physics personnel exited containment after taking air samples.

Upon exit, surveillance 4.6.1.3.a was performed to verify elevation 130' air lock leak rate.

Test showed excessive leakage on inner door.

The air lock was declared inoperable and Action Statement 3.6.1.3 was implemented.

The unit was in Mode 3 at this time in preparation for a cooldown to Mode 5.

At 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> the Shift Supervisor sent an operator to investigate the air lock.

The operator removed a small piece of foreign material and tested the inner door leak rate.

Results were satisfactory.

Action Statement 3.6.1.3 was terminated at 2217 hours0.0257 days <br />0.616 hours <br />0.00367 weeks <br />8.435685e-4 months <br />.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

This occurrence was caused by a 1/2 inch long section of 1/16 inch plastic tubing being trapped in the door seal.

This foreign material did not allow the door to seal completely causing the excessive leakage.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.1.3 states that with an 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 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 130' inner door was returned to operable status within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and 15 minutes.

The unit was in a cooldown to Mode 5 during this period.

CORRECTIVE ACTION

Investigation by Operations personnel revealed a small piece of foreign material trapped on the door seal.

The material was removed and the leakage test rerun.

Results confirmed operability.

LER 78-03/03L e 1/11/78 FAILURE DATA:

N/A Prepared by T. L. Spencer

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Station SORC Meeting No.

5-78

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NRC FORM 366 t7-771

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6 (PLEASE PRINT QA TYPE ALL REQUIRED INFORMATION)

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I N !J I s I G I s I 1 101 o I o I - I o I o I o I o I o I - I o I a 101 4 I 1 I i I i I i 101 I I @

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9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE

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~~~~~ W© 1 a I s I a I a I a I 2 I 1 I 2 101 o I 11 i I i I 1 I a I© I o I 21 o ! 9 I 7 I B 10 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

!Health Physics personnel entered containment to take air samples. Uponj

[]JI] 1exit via elev. 130' air lock, Tech Spec Surveillance 4.6.1.3 performed I

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ion inner door showed excessive air flow.

Similar events, 77-58 & 70.

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!All other air lock doors were operable.

Door returned to operable C£::nJ !status within seven hours.

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SYSTEM CODE 1x1x1@

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(;:;\\ LER'RO LVENTYE.A.R v..:,; REPORT I 7 I 8 I NUMBER 21 22

CAUSE

CAUSE CODE SU8CODE COMPONENT CODE w@ l.!J@ 1x1x1x1x1x1 18 11 12 13 18 SEQUENTIAL OCCUR REN CE REPORT NO.

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JO VALVE SUBCODE L..!J@

20 l.=:J 31 REVISION NC.

LQJ 32 80 ACTION FUTURE EFFECT SHUTDOWN

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ATTACHMENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED NPRD-4 FORM liU8.

PRIME C.OMP.

SUPPLIER COMPONENT MANUFACTURER W@W@ W@

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

42 43 44 47

!Foreign material on sealing gasket would not allow adequate door con-ITIO !tact causing excessive leakage.

Foreign materjal removed from gasket III}] 1surveillance 4.6.1.3.a performed with satisfactory results

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FACILITY tJQ\\

STATUS

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9 10 12 11 ACTIVITY CONTENT

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10 11 PERSONNEL EXPOSURES Q

80 METHOD OF

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DISCOVERY DISCOVERY DESCRIPTION ~

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N/A 45 BO NUMBER

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DESCRIPTION

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11 12 13 PERSONNEL INJURIES t:'::'\\

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9 11 12

. 80 LOSS OF OR DAMAGE TO FACILITY 143' TYPE

DESCRIPTION

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NAMEOFPREPARER----......;T:....:.*--=L-.'--~s.p~e~n~c==e~r,__~---------

PHONE: (609)365-7000 Salem Ext.~

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