ML19316A485

LER 77-030/03L-0:on 771220,2.8 Gallon Per Minute Leak Indicated by Reactor Bldg Normal Sump Level rate-of-change Monitor.Caused by Valve 1RC-2 Packing Failure.Valve Repacked & Tested Using PT/1/600/10 RCS Breakage

ML19316A485
Person / Time
Site:	Oconee
Issue date:	01/19/1978
From:	Ken Wilson DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19316A483	List: ML19316A482 ML19316A484 ML19316A485
References
LER-77-030-03L, LER-77-30-3L, NUDOCS 7912110820
Download: ML19316A485 (1)

Text

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CAT DATE EVENT DESCAIPEON AND PROS A8LE CONSEQUENCES h t o 121 l RIA-47. RB narticulate and RIA-48 RF iodine monitors sicnaled a hich alarm l Lo_i.1j i and the RB normal sump level rate-of-chance monitor indicated a 2.8 gpm i 1o 1 1 I leak. Unit was shut down and after c., lingi lt was determined that the  ;

sots l l nacking of 1RC-2 pressurizer spray bypass valve was blown causing the leak j q o is j l which required shutdown within 24 hrs. (T.S. 3.1.6.2). The leak was sub- i

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io,,,l RB without determental effects to public health and safety.  ;

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