ML19262A941

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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 Southern Nuclear icon.png
Issue date: 12/03/1979
From: Hairston W
ALABAMA POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19262A938 List:
References
LER-79-052-03L, LER-79-52-3L, NUDOCS 7912110338
Download: ML19262A941 (1)


Text

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@

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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 o 9 3

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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 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 l F l@ l 0 l 4 l 5i2l@ n NA 44 l lAl@l*

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