ML19262A941

LER 79-052/03L-0:on 791106,refueling Water Storage Tank Declared Inoperable When Water Vol Fell Below Tech Specs. Caused by Drift Problems on Level Transmitters.Transmitters Undergoing Repairs

ML19262A941
Person / Time
Site:	Farley
Issue date:	12/03/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19262A938	List: ML19262A937 ML19262A939 ML19262A940 ML19262A941 ML19262A942
References
LER-79-052-03L, LER-79-52-3L, NUDOCS 7912110338
Download: ML19262A941 (1)

Text

{{#Wiki_filter:NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7-77) LICENSEE EVENT REPO.1T NTROL 8 LOCK: l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 R l Al 7 8 9 Ll JlUCENSEEMl FlCODE 1l@l 0 l 150l -l 0 l 0 l 0 14 l 0 l 0 l - l 0 l 0 l@l LICENSE NUMBER 26 426l 1 lLICENSE 1 l 1TYPE l 1JOl@l51 C Al T 58l@ CON'T RTil " "' 5O RC IL @l 6801 51 01 Oi 01 3 l 4 l 8 Gil63 ll [ 0EVENT l 6DA7E l 7 l 9 }@l 1 l 2 REPOHT l0l3 l 7 l 9d0l@ 7 8 60 COCK ET NUMBER m I4 75 DATE EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h lo 121 l At 1325 on 11/6/79, the Refueling Water Storace Tank (RWST) was declared inoperable lo la l l when it was determined that the water volume (456,279 2allons) was below the Tech. o 4 l Soec. 3.5.5 limit of 471,000 gallons. Tech. Soec. 3.5.5 action statement r ecu ire- l o 5 l ments were met. The RWST level was restored to >471,000 callons by 1700 on 11/6/79. l Q W l The lalth and safety of the general public were not affected. I 3 7 l l io e i I 7 8 9 80 SYSTEM CAUSE CAUSE COMP VALVE CODE CCCE SLBCOOE COMPONENT COCE S t.,8 C 0 0 E SUCCCOE

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d; i 6 IC !@) 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i o lAs a result of the initiation of a RWFT low level alarm (<471.000 ent!ansT d ich was I i i lat variance with the RWST level indicators (>471.000 Tallons). , troubleshoord-- I i 2 lcffort revealed that one level transmitter had drif ted low and the cther transmitter  !

      . B l was exhibitine uncorrectable drif t problems.                                                           One level transmit ter was returned to                                            l
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4 l service on 11/9/79 and the other transmitter will be renaired when narts are availablel - 8 3 80 STA S  % PCWER OTHER STATUS ISCO RY DISCOVERY DESCRIPTION i s Troubleshooting effort

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