ML19283B771

LER 79-008/03L-0 on 790216:during Review of Surveillance Test FNP-1-STP-15.0,containment Main Personnel & Emergency Air Leak Outer Doors Failed to Meet Acceptance Criteria. Leakage Probably Caused by Dirty Door Seals &/Or Seal Set

ML19283B771
Person / Time
Site:	Farley
Issue date:	03/14/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19283B767	List: ML19283B766 ML19283B770 ML19283B771 ML19283B774 ML19283B775 ML19283B776
References
LER-79-008-03L, LER-79-8-3L, NUDOCS 7903190277
Download: ML19283B771 (3)

Text

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EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h O 2 l During a review of surveillance test FNP-1-STP-15.0 on 2-16-79 it was discovered l o 3 l that the containment main personnel and emergency air lock outer doors failed to l o 4 l meet the acceptance criteria of Tech. Spec. 4.6.1.3.a. Tech. Spec. 4.6.1.3.a action l 10 l s 1 I statement requirements were met. The health and safety of the general public were  ;

i O s i nOt affected. A similar occurrence was reported in LER 78-081/03L-0. l 1

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41 l42N l@ l Alh 43 l44Cl 1l 31 Ol@ 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 O l Leakace was caused by probable dirty door seals and/or temnorary set in the seals l l1 1 l I caused bv the immediate earlier performance of FNP-1-9TP-118.0. Follodie c i r* n ni n g l

,, , , , l and lubrication of the sealing surfaces and the successful performanceof F P-1-STP-15} 0,

,,,3, l both main and emergency air lock outer doors were declared Operable at 2015 and 2100 l 3 4 l respectively on 2-16-79. l .

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7 8 9 to NAME OF PREPARER W. G. Hairston. III PHONE: U09 NOO-S I %

ALABAMA POWER COMPANY JOSEPH M. FARLEY NUCLEAR PLANT DOCKET NO. 50-348 ATTACIDIENT TO LER 79-008/03L-0 Facility: Joseph H. Farley Unit 1 Report Date: 3/14/79 Event Date: 2/16/79 Identification of Event Containment main personnel and emergency air lock outer doors failed to meet the acceptance criteria of Tech. Spec. 4.6.1.3.a.

Conditions Prior to Event The unit was in mode 1 at 89% power.

Description of Event FNP-1-STP-118.0, " Containment Airlock Leakage Test", was completed satisfactorily for both air locks on 2/16/79. In order to declare both air locks operable, FNP-1-STP-15.0, " Containment Air Lock Door Seal Operability Test", was required to be performed satisfactorily as well. FNP-1-STP-15.0 was performed on the main air lock at 0600, 1750 and 1840 with unsatisfactory results. (The initial performance of this STP was marked satisfactory by the Assistant Plant Operator due to his misinterpretation of the acceptance criteria.)

FNP-1-STP-15.0 was performed on the emergency air lock at 1535 with unsatisfactory results. During the Shift Foreman review of FNP-1-STP-15.0 at 1600 on 2/16/79, it was determined that both air lock outer doors had failed to meet the acceptance criteria of Tech. Spec. 4.6.1.3.a (pressure leakage of 2 lbs. and .5 lbs. ,

respectively vs. no detectable leakage permitted). After cleaning tnd lubricating of both door seals, and a successful performance of FNP-1-STP-15.0 on both air locks, the doors were declared operable at 2015 and 2100 on 2/16/79.

Designation of Apparent Cause Leakage was caused by probable dirty door seals and/or temporary set in the seals caused by the immediate earlier performance of FNP-1-STP-118.0. Performance of FNP-1-STP-118.0 requires pressurizing the air lock interior to 48 PSIG, hence the temporary set. The temporary set is not attributable to performance of FNP-1-STP-15.0 in that the air space between the two seals on the outer doors is pressurized.

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79-008/03L-0 Analysis of Event Tech. Spec. 3.6.1.3 action statement requirements were met. The doors were returned to an operable status within the time allowed by Tech. Spec. 3.6.1.3. The health and safety of the public were not affected.

Effect on Plant This occurrence had no significant effect on plant operation.

Corrective Action

a. The seals were cleaned and lubricated.

b. The Assistant Plant Operator was instructed regarding the proper acceptance criteria in FNP-1-STP-15.0.

c. FN STP-15.0 will be revised to clarify the acceptance criteria.

Failure Data A similar occurrence was reported in LER 78-081/03L-0.

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