05000364/LER-1981-031-03, /03L-0:on 810718,pressurizer Level Indicators LI-459,460,461 & 462,pressurizer Heaters,Wide Range RCS Pressure Channel PT402,pressurizer Pressure PT-455 & 456,RCS Pressure PT402 & Subcooling Monitors Input Inoperable

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/03L-0:on 810718,pressurizer Level Indicators LI-459,460,461 & 462,pressurizer Heaters,Wide Range RCS Pressure Channel PT402,pressurizer Pressure PT-455 & 456,RCS Pressure PT402 & Subcooling Monitors Input Inoperable
ML20010D226
Person / Time
Site: Farley Southern Nuclear icon.png
Issue date: 08/18/1981
From: Hairston W
ALABAMA POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010D212 List:
References
LER-81-031-03L-01, LER-81-31-3L-1, NUDOCS 8108240110
Download: ML20010D226 (2)
v • d • e


LER-1981-031, /03L-0:on 810718,pressurizer Level Indicators LI-459,460,461 & 462,pressurizer Heaters,Wide Range RCS Pressure Channel PT402,pressurizer Pressure PT-455 & 456,RCS Pressure PT402 & Subcooling Monitors Input Inoperable
Event date:
Report date:
3641981031R03 - NRC Website
v • d • e

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3 60 61 OCCKET NUMBER 6d 63 EVENT CATE 74 75 REPCRT CATE 30 EVENT DESCRIPT1CN AND PROB A8LE CONSECUEN';ES l o i:1 l At 0744 on 7/18/81, pres:urizer level indicators LI-459, L1-460, LI-461 and LI-462; the [

[ o i a i l pressurizer heaters; wide range RCS pressure channel (PT402); and pressurizer pressure l

[ o i.: l l (PT-455 and PT456) and RCS pressure (PT402); inputs to the RCS subcooling margin monitorr l B 15! lwere momentarily rendered inoperable (less than 1 minute) and pressurizer pressure momen-l ioisI !tarily decreased to less than 2220 psia due to heater inoperability. The protection j o i 7 I l functi[ns of the listed instrumentation loops were not af fected.

Tech. Spec. 3.3.3.8, in j toisilpart, requires 2 RCS wide rance pressure indicators, 2 pressurizer water level indicators l 7

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r LER 81-031/03L-0 Event Description and Probable Consequences (cont'd) and 2 RCS subcooling margin monitors to be or able. Tech. Spec. 3.4.4, in part, requires 2 groups of pressurizer heaters to be operable. Tech. Srec. 3.2.5, in part, requires the pressurizer pressure to be greater than or equal to 2220 psia. Tech.

Spec. acti7n statement requirements were met.

Health / safety of the public was not affected.

Cause Description and Corrective Actions (cont'd) state condition by the operators taking manual control of the affected control loops.

The short to ground was corrected, the pressurizer heaters were energized, the pressurizer level restored and the pressurizer pressure returned to a value within the Tech. Spec. limit at 0754 on 7/18/81. Personnel involved have been instructed to calibrate their equipment prior to connecting the instrument channels, l

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