ML19347E314

LER 81-014/01T-0:on 810401,containment Oxygen Concentration Was Not Reduced to Less than 5% within 24-h After Placing Reactor Mode Switch in Run.Caused by Inerting at Significantly Reduced Rates

ML19347E314
Person / Time
Site:	Oyster Creek
Issue date:	04/15/1981
From:	Crosby P JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19347E311	List: ML19347E310 ML19347E314
References
LER-81-014-01T, LER-81-14-1T, NUDOCS 8104240563
Download: ML19347E314 (1)

Text

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7 8 do St DOCK ET NUMeg n es ow EVENT CATE EVEN f OESCRIPTION AND PROSABLE CONSEQUENCES h Lo.11J l containnent oxygen concentration was not reduced to less than 5 percent [

r o ,3, I within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after placing the reactor mode switch in HJN as required g f"oTTl o i by T.S. 3.5.A.6, and the Drywell to Torus differential pressure was not l lo isi ; established as required by T.S. 3 5.A.9.a. Containment inerting was in l l c e e i t progress at the tine but at a reduced capacity. A reactor shutckmTt was l Ic i i i ccamenced while inerting continued. The shutdown was terminated when the  ;

i o !a i i oxygen concentration and the differential pressure limits were met. l 7 3 4 30 SYSTEU CAuSE CAUSE CCMP. VALv g

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ii ii ; I reduced rates. The Torus was limited due to apparen'c venting probicsns ,

gl and the Drywell inerting was limited by tha nitrogen vaporizer operating ,

,,,3, l in a reduced status. The 'Ibrus vent valves will be inspected by the plan ,

,, i, i l t and the vaporizer will be inspected by the vendor at the next outace. ,

7 8 9 30 A  % PCwtm QTHER STATUS i O Y DISCOV ERY Q ESCRIPTION l: l s l ((j@ l 0 l 7 l 2 l@l NA Operational Event l lAl@l l 1

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NRC usE oNtv issue 12 l o l l toY f@NEsCai*ticNQ l Weekly News Release l Lj_ l I I I I I l 1 l l l f i a 9 68 69 go.-

Paul J. Crosby (609)693-6037 e g 4 0 s2 '"^"'" '" "' '

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