ML19261A788

LER 79-001/03L-0 on 790102:refueling Water Tank Level Indicator Failed High.Caused by Frozen Transmitter Sensing Line.Line Was Thawed & Returned to Operable Status within 20-h

ML19261A788
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/31/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19261A787	List: ML19261A786 ML19261A788 ML19261A792
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7902080174
Download: ML19261A788 (1)

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NRC FORM 366 U. S. NUCLE AR REGULATORY COMedtSSION (7 77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: l l l l l l 6lh (PLE ASE PRINT OR TYPE ALL REQUt3ED INFORMAT60N)

B I O I8 i9 I l AjLICENSEE 7

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HEPOHT O ATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES bic

,, 2 l During Power Escalation Testing', Mode 1 operation, Refueling Water ,

ITTTl t Tank level indicator, 2LT-5639-3, which supplies a RAS o . I signal input to PPS "C", failed high. The requirements of Action  ;

i n i s l l Statcment #9, T.S. Table 3.3-3, were met. Reportable per T.S. 6.9.1.9 (b),

o 6 L No similar occurrences. I o 3 1 l

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[kj g lF l1 lc'2j'd jg 43 as 43 CAUSE DESCRi PTION AND CORREC rlVE ACTIONS h i o l The transmitter sensing line was found to be fro::en. A heat lamp ,

Iiii1I was niaced in the transmitter box to thaw the line. The transmitter i i 2 I was returned to operable status within 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> of the failure.

i L1Jl i til A l I STA  % POWER OTHE H ST ATUS DISC v HV Discovf HY DEZulP TION i s

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[1.]3,j W @ l NA 7 8 9 10 l go t$$y DESCRIPTION N C UST (N4LY L2_Lo_]l.lOE@lNA 1 Iil llllll Iil AVE OF PREPAREF1

• PHONE.

790208017f

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