ML20064B750

/03L-0 on 780901:while Testing ADS Subsys,Timers on Both Loops Were Found Outside the 115-125 Second Limit of Tech Specs Due to Setpoint Drift of Time Delay Relays. Timers Were Calibrated,Retested & Returned to Svc

ML20064B750
Person / Time
Site:	Peach Bottom
Issue date:	09/26/1978
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B
References
LER-78-037-03L, LER-78-37-3L, NUDOCS 7810100082
Download: ML20064B750 (1)

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Mr. Boyce H. Grier, Ofrector No. 2*73*o37/03/L-O offlee of Inspection & inforcement Region i U.S. '8uclear 4gulatory Caprif ssion 631 Park Avenue King of Prussia, PA 19106 Oear Mr. Grier This 122 refers to two ADS timmes found to be outside the 1*ot 5 second limit ,f Technical Specification Table 3.2.3 page 67, during surveillance testing required due to the KPCI system being declared inoperable. Tech Spec 3.5.C.2 dictated the testing of the ADS subsystem, and Tech Spec 3.5.C.3 required the initiation of shutdown.

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rTTT1l 'Jhile testing the AOS subsystem, as required due to the EPCI being g A declared inoperable at power, the timers on both loope were found to be  ;

i,,.i p outside the 115-125 second limit of Technical specifications ('A' timer 1 i3 5, t 101 seconds. '3' timer 127 seconds). In both cases a controlled l

.,o,,i; shutdatm vee initiated as recuired by Tech Spec 3.5.C.3. The timers were  ;

[3.,l l calibrated, ratested satisfactorily, returned to service and thfi 'mit t

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'A'SE CE3cpt#TtoN AND COReicT'VE ACTIONS 27 i,,e;i Both failurse were did to setooint drift of the Asastat type T2 TOPU t i i . _s I ti=a delav relavs. *hese relave were recalibrsted and tasted to verifv i I the time delav intervel. I i 6, s f I ii..ii

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