ML20024C401

LER 83-025/03L-0:on 830528,during Calibr Procedure FNP-2-STP-612.0,reactor Coolant Pump 2A Undervoltage Relay 27-3 Declared Inoperable.Caused by Setpoint Drift.Relay Setpoint Adjusted

ML20024C401
Person / Time
Site:	Farley
Issue date:	06/22/1983
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20024C388	List: ML20024C387 ML20024C401 ML20024C406
References
LER-83-025-03L-01, LER-83-25-3L-1, NUDOCS 8307120590
Download: ML20024C401 (1)

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EVENT D ATE F4 ,5 R EPORT D ATE 44 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I o 12 I l At 0030 on 5/28/83 during performance of FNP-2-STP-612.0 (Reactor Coolant Pump l 1013 l l Bus Reactor Trio Undervoltaae Relav Calibration), 2A reactor coolant pump under- l 10 l4 l l voltaae relav 27-3 was declared inocerable due to its out of Spec. condition (69.8l lo is l l volts actual vs 75.43 volts reauired). Tech. Spec. 3.3.1 and 3.3.2, in part, re- l 1018 l l auires the relav to be operable. Tech. Spec. action statement requirements were l 1017 l l met. Health / safety of the oublic was not affected. A similar occurrence was re- l lO ! 8 I I, ported h LER 82 n26/n3L n (tinit 2) l

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@ [G_ l 0 I 8 [ 0 l SS 34 35 54 57 61 49 42 47 44 SF CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Orr Iilo ll This event was attributed to setpoint drift. Following adjustment of the relay l 1111 l l setpoint, 2A reactor coolant pump undervoltage relay was declared operable at l l1l2 l l 0045 on 5/28/83. l l i l 31 l l 111411 1

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NAME OF PREPARER W. G. Hairston, III pgone: (205) 899-5156