ML20052E654

LER 82-021/01T-0:on 820416,containment Oxygen Concentration Not Reduced within 24-h After Run Mode & Drywell to Torus Differential Pressure Greater than 1 Psi.Caused by Loss of 6-h Inerting Time Due to Insufficient Nitrogen

ML20052E654
Person / Time
Site:	Oyster Creek
Issue date:	05/03/1982
From:	Hager C GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20052E647	List: ML20052E646 ML20052E654
References
LER-82-021-01T, LER-82-21-1T, NUDOCS 8205110310
Download: ML20052E654 (1)

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I NRC FORM 3(n4 U.S.NUCLEAA AEGULATORY CGMMi&5404 'l (7 771 LICENSEE EVENT REPORT coNiaoc utoCo l I l l I I I@ (PLEASE Pa NT oa TvPE Au aEcuiaEo NPoauAnoNa lo l i..j l N I ucs.sas Jl O l caos C l P l l ]@wl0 l 0 l- 10 ] 0l0 l 0 l 0 l- 1010se l@l4 11 l 1l111 l Ig a i. ucansamum.en se ucam u ivPs al@les car es CON'T 101il l'*$ l Ll@j 015101010 l2 l 1 I 9 Ql014 eve.e7DATE OOCKET seu egm et GS il 16 l 812 Ql0 l 5101318

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7 8 GO el EVENT DESCRIPTION AND PROSASLE CONSEQUEA;CES h I..ie1l Containment oxygen con ntration was not reduced to less than 5 percent i m 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 RUN as required ,

, , . i by T.S. 3.5.A.6 and the drywell to torus differential pressure was not

, , , , i greater than 1 psi as required by T.S. 3.5.A.9A. Containnent inerting was ,

i in progress at the time bdt had previously lost 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> inerting time. A o o i u i,i i reactor shutdown was cminenced while inerting continued. The shutdown ,

was terminated when the T.S. requiremnt levels were obtained.

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- CAUSE DESCAiPTION AND CORHEC(svE ACTION", 77 .

g l The nujor cause of the occurrence is the loss of over 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> inerting time ,

, , i due to insufficient nitrogen supply and a blown rupture disc in the nitrogen ,

, , I nurno line. Engineering to upgrade oxygen analyzer systems and to verify i m I canacitv of nitrogen evaporator. At present, reactor will not be put in RUN g g i mode until inerting is coupleted, unless authorized by the Plant Operations ,

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