ML20147B232

/03l-0 on 780830:E-3 Diesel Start Time to Reach Rated Voltage & Frequency Did Not Meet Surveillance Test Requirement,Probably Caused by Leaking Check Valve in the Hydraulic Sys Assoc W/The Air Booster Relay

ML20147B232
Person / Time
Site:	Peach Bottom
Issue date:	09/29/1978
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B
References
LER-78-035-03L, LER-78-35-3L, NUDOCS 7810100038
Download: ML20147B232 (1)

Text

Kr. Boyce H. Grier, Director No. 2-78-35/03L-0 Office of Inspection (, Enf orcement, Region i U.S. Nuclear Regulatory Conunission 631 Park Avenue King of Prussia, PA 19406 De ar Hr . Gr ier s G This LER refers to the failure of the E-3 diesel to Neet t he' n design basis starting time during a surveillance test. The governing

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Technical Specification are 3.9.B.3 and 4.9. A.I.a. E' $

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surveillance test requirement (15 vs 10 sec). Start times for remaining l o 3 l l

10 le i i diesels were acceptable. Retest (one hour) showed acceptable start time.

I A L _Jonslisetlon initisted, Safety conseguences are minimal. since redund-

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o e Larsources are available. Daily tests were performed to ensure operab-l gl 111ty and to maintain hydraulic fluid in the air booster relay until I

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in the hydraulic sys-io 1 The mqgLpIgbable cause wa s a leakine check valve tem associated with the air booster relay (Fairbanks Morse Part NO 16-105 i i i l

-974). A new air booster relay was installed. The diesel tested satisfac- l gg I

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