ML20009G087

LER 81-013/03L-0:on 810528,1-inch Breach Discovered in 3-h Fire Barrier in Floor of Control Room Outside Shift Supervisor Ofc.Cause Undefined Due to Breach Being Covered Since Const of Control Room

ML20009G087
Person / Time
Site:	Oconee
Issue date:	06/26/1981
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G079	List: ML20009G078 ML20009G087
References
LER-81-013-03L, LER-81-13-3L, NUDOCS 8108030315
Download: ML20009G087 (1)

Text

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l0# l512I8l 8l 1@l0 l 6 mePoar Evtar QArt 74 TS l 2l 6l QArt 8l 1l@ se EVENT DESCRIPTION ANO PRCSAst.1 CONSEQUENCES h totall on May 28, 1981, a 1-inch breach in a 3-hour fire barrier was oiscovered in the ; i N l floor of the Unit 3 Control Room inst outside of the Shift Supervisor's office. I lotalI Due to tiie low combustibility _of materials, the small size of the breach, and the;

[TTi"1 I smoke detectors located on both sides of the breach, the possibility of a fire  ;

t o is I l n,yo,dina vn- erv low Additionally. the Contr71 Room is continuousiv manned. l E I Therefore,'this incident was of no significance with respect to safe operation, r i o is i I ,na ebn kn,1rb nnd 9,forv of ebo nublic were not affected, f sysru.ns cause c v ,v, coo -

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t , t oj l The cause of this incident cannot be clearly defined because the breach had been, IT"ITT I covered since construction of tae Unit 3 Control Room. The breach was a g m I threaded nine sleeve. The threads were chased with a 1-inch pipe die to clean i m I them. Two 1-1.ch pipe plugs were then installed to seal the barrier. The  ;

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Naase ca eRePAman J. L. Jones rwena: (704) 373-8197 8108030315 810626 PDR ADOCK 05000287 l 5 PDR -- . _ _ _ _ . -

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