ML19350A905

LER 81-021/03L-0:on 810211,reactor Coolant Pumps 1 & 2 Were Stopped.Caused by RCS Pressure Going to Zero After RHR Containment Spray Isolation Valve Inadvertently Opened.Pumps Returned to Operable Status in Approx 1-h

ML19350A905
Person / Time
Site:	Sequoyah
Issue date:	03/11/1981
From:	Kirk G, Mcgriff J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350A904	List: ML19350A903 ML19350A905
References
LER-81-021-03L, LER-81-21-3L, NUDOCS 8103170413
Download: ML19350A905 (1)

Text

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EVENT DESCRIPTION AND PROBAstE CONSECUENCES h . ,

iTI Unit 1 in mode 5. The unit o'oeratrir stooned re1ctor enoinne nemos 1 and 2. Since 131 1 reactor coolhnt pumos 3 and 4 and residual heat removal numo 'B' were also not in 3lal I service at this time, the unit entered LCO 3.4.1.3.a and LCO 3.4.1.3.b' There was

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>I51 l no effect^upon public health or safety. Previous occurren'ces - none.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h .

t i I o l l The" unit operator stoeped reactor coolant pumps l' and 2 for fumo oiotectioN'when* tSe' iiil l RCS pressure went to zero after the RHR containdent sprav isolation valve was inadver-i 171 l tently opened. The RHR 'A' pump was running orior to the openina. of the valve and the

, g 31 l RHR 'B' pump was started approxinately 4 minutes af ter the valve was opened. Reactor

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i., I coolant pumps 1 and 2 were returned to operable status in approximately 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

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N'ame of Preparer J.M.McGriff/G.B. Kirk -

Phone (615) 842-8317 ___

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