ML20010C619

LER 81-083/03L-0:on 810716,during Mode 1,A Train Main Control Room Emergency Ventilation Sys Declared Inoperable. Caused by Failure of Charcoal Test Canister Due to Age & Weathering of Charcoal.Charcoal Replaced

ML20010C619
Person / Time
Site:	Sequoyah
Issue date:	08/11/1981
From:	Harding M, Kirk G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010C616	List: ML20010C615 ML20010C619
References
LER-81-083-03L, LER-81-83-3L, NUDOCS 8108200244
Download: ML20010C619 (1)

Text

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EVENT OESCRIPTION ANO PnOS A8LE CONSEQUENCES h The "A" train rain control room emergency ventilatiori J l2]l Unit 1 Mode 1 at 98% RTP.

• l ;TT1 I system was declared'inoperabie at 1339 (c) due to failure of the charcoal' test g

the acceptance criteria of 99% methyl iodine reu:cval ef ficiency.

'J u l 4 1 l canister to meet I n i s ] I This event required entry into LCO 3.7.7.1.' Tliere was no ef fect upon public health g g [ or safety. Previous Occurrences'- one (Reference SQRO-50-327/81071) '

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g lN l2 l3 l047l 44 36 CAUSE OESCFUPTION ANO ;ORRECTIVE ACTIONa h '

y lilo j l The probable cause has been attributed to the age of the charcoal and weathering ~

The charcoal wa's replaced and the "A'!  ;

1i)ij L (exposure to flowing air) of the charcoal.

, 2 l train of the main cor. trol room emergency ventilhtion system was satisfactorily tested

, 3 l and returned to, service by 1825 (c) on 7-17-81. ,

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gg gg llllllll))lll 2 3 9 Natne of Preparer: Clenn B. Kirk / Mike R. Harding Phone: (615) 842-8317 'd 8108200244 810833 -- - -- - - - - - - - - ~ ~ - - ~ - ----~

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