05000280/LER-1981-073-03, /03L-0:on 811108,isolation Valve to Recirculation Spray HX a Failed to Close.Cause Undetermined.Valve Operated Normally Later.Limit Switch & Torque Settings Examined & Found Satisfactory

/03L-0:on 811108,isolation Valve to Recirculation Spray HX a Failed to Close.Cause Undetermined.Valve Operated Normally Later.Limit Switch & Torque Settings Examined & Found Satisfactory

ML20027C776
Person / Time
Site:	Surry
Issue date:	12/07/1981
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027C765	List: 05000280/LER-1981-073-03, /03L-0:on 811108,isolation Valve to Recirculation Spray HX a Failed to Close.Cause Undetermined.Valve Operated Normally Later.Limit Switch & Torque Settings Examined & Found Satisfactory ML20027C764
References
LER-81-073-03L-03, LER-81-73-3L-3, NUDOCS 8210270224
Download: ML20027C776 (2)

LER-1981-073, /03L-0:on 811108,isolation Valve to Recirculation Spray HX a Failed to Close.Cause Undetermined.Valve Operated Normally Later.Limit Switch & Torque Settings Examined & Found Satisfactory

Event date:
Report date:
2801981073R03 - NRC Website

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AITACl!ENT 1 SERRY PO*w'ER STAT 105 UNIT NO. 2 DOCAET SO:

50-281 REPORT NO:

81-073/03L-0 EVCC DATE:

11-08-81 TITLE OF TI!E EVENT:

Mov-%'-201. A WJLD NOT CIDSE i

1.

DESCPIPTION OF EYC?T:

Vn11e performing Periodic Test 8.5A, NOV-5W-201.A. Isolation Valve to Recirculation Spray Heat Exchanger "A", would not close. After sevtral atterpts, the valve was successfully cycled electrically. This event is co.trary to T.S.3.4./. 5 a id reportable per T.S.6.6.2.b(2).

2.

PP.0EAFL" CasSE0UENCES AND STATUS OF REDU'!DA'4 SYSTDiS:

In the event of the Design Basis Accident, service water from each recirculation spray heat exchanger is monitored for radiation leakage from cny defective subsysters. If leakage above that allowable was detected, the defcetive subsyste:s would be shutdown by operation of remote u.otor operated valves to isolate the recirculation spray heat l

exchanger.

1 -

I Since 'zanual isolation of the flow path fre:a recirculation spray heat exchanger "A" tecained avcilable, the health and safety of the public 1

sere not affected.

4 h

3.

CAUSP:

)

The reason the valve initially failed to cycle could not be determined.

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4 I'ffEDI ATE (X1CECTIVE ACTION:

}

)

A naintenanca request was initiated. Subsequent operation of the control room switch resulted in normal valve operaticn.

d 5.

S"EFETE :T CGRi(ECTIVE ACTIo':-

Preventative raaintenance.has been perferned en valve noter r.nd associated cor. trol circuits and the results were satisfactory.

6.

ACTION T Aqy TO P'JVr';T REClTJJ2'CE:

I Gone deened necessary.

7.

CE' EF!C 15fPLICATIO S:

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