05000348/LER-1981-016-03, /03L-0:on 810405,during Channel Check Surveillance test,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable When Trip Setpoint Failed to Meet Tolerance Requirements.Caused by Defective Nll Card

/03L-0:on 810405,during Channel Check Surveillance test,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable When Trip Setpoint Failed to Meet Tolerance Requirements.Caused by Defective Nll Card

ML20003H984
Person / Time
Site:	Farley
Issue date:	05/04/1981
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003H971	List: 05000348/LER-1981-012-03, /03L-0:on 810402,during Testing of Containment 1A Spray Pump,Containment Spray Sys Snubber CS2-Rl31 Declared Inoperable Upon Discovery of Hydraulic Fluid Leakage.Caused by Cracked Reservoir.Reservoir Replaced 05000348/LER-1981-015-03, /03L-0:on 810404,during Channel Check Surveillance Test,Feedwater Flow Loop FT-486 Failed to Meet Tolerance Requirements & Declared Inoperable.Caused by Plug Assembly for Root Valve for Transmitter FT-486 Not Opening 05000348/LER-1981-016-03, /03L-0:on 810405,during Channel Check Surveillance test,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable When Trip Setpoint Failed to Meet Tolerance Requirements.Caused by Defective Nll Card 05000348/LER-1981-017-03, /03L-0:on 810405,while Performing FNP-1STP-28.2, LOSP BIF Sequencer Failed to Meet Time Requirements for Picking Up Step 6.Caused by Agastat Timer Setpoint for LOSP BIF Sequencer Drifting Below Setpoint.Timer Adjusted ML20003H970
References
LER-81-016-03L, LER-81-16-3L, NUDOCS 8105080289
Download: ML20003H984 (1)

LER-1981-016, /03L-0:on 810405,during Channel Check Surveillance test,overtemp-delta Temp Instrumentation Loop Associated w/TI412C Declared Inoperable When Trip Setpoint Failed to Meet Tolerance Requirements.Caused by Defective Nll Card

Event date:
Report date:
3481981016R03 - NRC Website

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EVEN1 M5CRIPTION AND PRCBABLE CoNSECUENCES h io 6 2i lAt 0250 on 4/5/81, while perfoming a channel check surzeillance test, the overtacperattu;e l-delta tercerature instrtrmntation loop associated with TI 412C was declared inoperable g io i3i

~i o o i lwhen its trip setpoint failed to met the tolerance requirements of the test. Tech.

l Spec. 3.3.1.1, in part, requires TI 412C to be operable. Upon discovery of the out of l

io !3l l o ia 1 l spec. condition, Tech. Spec. 3.3.1.1 action stataaent requircinents were met. A review jof shiE. records shortly after the above incident occurred indicated that the out of l

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33 34 35 36 31 40 48 42 43 44 47 cAuSE cEScRtPrioN AND CORRECTIVE ACTIONS h I i ! o i IThis occurrence is attributable to a defective NLL card and an out of adjustment gain Iiiii lootentiometer. The defective card was replaced, the potentiometer adjusted, and the i, i,i ichannel was returned to service at 1735 on 4/5/81 follcuing the successful performance

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