ML20009G501

LER 81-105/01T-0:on 810710,manifold Inlet Valve Opened, Causing Steam to Blow Out Open Vent & Drain Valves,Resulting in Reactor Coolant Leak.Caused by Personnel Error.Manifold Vent & Drain Valves Closed.Personnel to Be Instructed

ML20009G501
Person / Time
Site:	McGuire
Issue date:	07/24/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G496	List: ML20009G495 ML20009G501
References
LER-81-105-01T, LER-81-105-1T, NUDOCS 8108040355
Download: ML20009G501 (1)

Text

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(TT5T I While in Mode 3, during the replacement process of a defective resistance tenperaT g 'I ture detector (KTD) on the "A" loop'RTD manifold', a technician opened the manifolf's g Iinlet valve causing' steam to blow out the open vent and drain valves. This re 3 g iactor coolant leak possibly violated Tech. Spec. 3.4.7.1 and is reportable per 9 Ioee1iTs 6.9.1.12(G). Because of the actions of the positive di ,,lacement pump, the- g-p.#rt tavailability of all the safetr injection pumps had they been needed, and only new,.

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IitoIl N TAE technicians misunderstood the instructions of their supervisor and at- g_

ii t i i i tempted to do work for which they were neither trained or qualified, and were ,

The leak was isolated by closing the manifold vent m I without proper procedures. p g i and drain valves. IAE technicians will recalve special instruction on which p iit*i I valves thev are allowed to operate and the entire tagging procedure.  ;

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8108040355 $10724 Phillip B. Nardoci ,70I)*373-7432

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