ML19345E462

LER 80-034/03X-1:on 801210,RHR Pump Room a Coolers Failed to Start Automatically.Caused by Improper Adjustment of Cell Switch Actuator Plunger on Pump Breaker.Breaker Replaced

ML19345E462
Person / Time
Site:	Peach Bottom
Issue date:	01/26/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-80-034-03X, LER-80-34-3X, NUDOCS 8102030586
Download: ML19345E462 (1)

Text

Mr. Boyca N. Griar, Otr:ctor No. 2-80-34/3L-x Of fica cf Inspecticn & Enforcement, R gion i U.S. NuclMr Regulttory Ccmenistion 631 Park Avenue King of Prussia, PA 19406

Dear ME Grier's' This L.E.R concerns failure of the Unit 2 "A" RHR room cooler fans to auto start during surveillance testing. The governing Tech. Spec. is 3.$.H.

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@l During surveillance testinst with the unit at nover. tha"A" RHD l 0 I subsystem was deeb re d inananM. in accordunce with Tech. Spee. 3.5.H I o . l because the "A" RRR pump room coolers failed to start automaticidly. _j

,, ., g The remaining RHR subsystem and both core spray systems were operabia g gl and the "A" RHR subsystem was returned to service three hours af ter j

,, , g it was declared inoperable. Similar occurrences LER 2-80 017/3L. g o e i  !

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,o l Cause was improper adjustment of cell switch actuator plunger on I gg pump breaker (CE Type 4.16-250-84) which initiates auto start of RHR room -i g g coolers upon RHR pump start. Entire breaker was replaced and ST was l

, , [ performed satisfactorily. A procedure to verify cell switch actuator l l g g plunger adjustment and proper cell switch operation is bel:.g writ .en. l

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