05000366/LER-1981-080-03, /03L-0:on 810829,during Control Board Walkdown, Torus/Drywell Vacuum Breaker Indicator 2T48-AOF-323H Was Inoperative.Caused Unknown.Vacuum Breaker Valve to Be Tested Per Tech Specs Until Repairs at Next Reactor Cold Shutdown

/03L-0:on 810829,during Control Board Walkdown, Torus/Drywell Vacuum Breaker Indicator 2T48-AOF-323H Was Inoperative.Caused Unknown.Vacuum Breaker Valve to Be Tested Per Tech Specs Until Repairs at Next Reactor Cold Shutdown

ML20010H964
Person / Time
Site:	Hatch
Issue date:	09/15/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010H954	List: 05000366/LER-1981-080, Forwards LER 81-080/03L-0 05000366/LER-1981-080-03, /03L-0:on 810829,during Control Board Walkdown, Torus/Drywell Vacuum Breaker Indicator 2T48-AOF-323H Was Inoperative.Caused Unknown.Vacuum Breaker Valve to Be Tested Per Tech Specs Until Repairs at Next Reactor Cold Shutdown
References
LER-81-080-03L-01, LER-81-80-3L-1, NUDOCS 8109290453
Download: ML20010H964 (2)

LER-1981-080, /03L-0:on 810829,during Control Board Walkdown, Torus/Drywell Vacuum Breaker Indicator 2T48-AOF-323H Was Inoperative.Caused Unknown.Vacuum Breaker Valve to Be Tested Per Tech Specs Until Repairs at Next Reactor Cold Shutdown

Event date:
Report date:
3661981080R03 - NRC Website

text

o NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 10 l 2 l Phile the plant was in steady state operation at 1160 MWt and while per-1 i O,3 ; l forming control board walkdown, one of the' redundant torus /drvwell vac-I iOi.1l gum breaker closed position indicators for 2T48-A0F-323H, was found to bel 10 i s i l noperative.

Tech Specs 3.6.4.1.b requires all torus /drywell vacuum l

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Plant operation nor tile l

l0 l 7 l health and safety of the public was affected.

This is a repetitive occ-l LOiRi prrence as last reported on Reportable Occurrence No. 50-366/1980-124.

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Testing of the vacuum breaker valve. 2T48-AOF-1 i,i,i ]323H, will be performed per Tech Specs 3.6.4.1, ACTION e, until the nextl ll1,3l l reactor cold shutdown, at which time inspection and repairs will be madel l

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Edwin I. Hatch Docket #:

50-366

Narrative

Report for LER 50-366/1981-080 On August 29,

1981, while the plant was in steady state operation at 1160 MWt and while performing control board walkdown, one of the redundant torus /drywell vacuum breaker closed position indicators for 2T48-AGF-323H, torus /drywell vxcuum breaker valve, was found to be inoperative.. Tech Specs 3.6.4.1.b requires all torus /drywell vacuum breakers to be operable and closed with.the redundant position indicators operable.

Plant operation nor the health and safety of the publi c was aff ected.

This is a repetitive occurrence as last reported on Reportable Occurrence Report No. 50-366/1980-124.

The cause of this occurrence is unknown at this time due to the inaccessibility of the valves.

Testing of the vacuum breaker valve, 2T48-A0F-323H, will be performed per Tech Specs 3.6.4.1, ACTION e, until the next reactor cold shutdown.

The torus /drywell -vacuum breaker closed position indicator will be inspected and repaired as necessary at that time.

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