05000278/LER-1979-007-03, /03L-0 on 790212:during Surveillance,Setpoint of a Logic Automatic Depressurization Sys Time Delay Relay Was Greater than Tech Spec Limit.Caused by Setpoint Drift on GE Model CR-2820 Time Delay.Relay Readjusted & Tested

/03L-0 on 790212:during Surveillance,Setpoint of a Logic Automatic Depressurization Sys Time Delay Relay Was Greater than Tech Spec Limit.Caused by Setpoint Drift on GE Model CR-2820 Time Delay.Relay Readjusted & Tested

ML19282C153
Person / Time
Site:	Peach Bottom
Issue date:	03/14/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
LER-79-007-03L, LER-79-7-3L, NUDOCS 7903210101
Download: ML19282C153 (1)

LER-1979-007, /03L-0 on 790212:during Surveillance,Setpoint of a Logic Automatic Depressurization Sys Time Delay Relay Was Greater than Tech Spec Limit.Caused by Setpoint Drift on GE Model CR-2820 Time Delay.Relay Readjusted & Tested

Event date:
Report date:
2781979007R03 - NRC Website

text

i i

e Mr. Boyce H. Crier, Ofrector No.

3-79-7/3L-0 Of fice of Inspection & Enforcement, Rogion 1

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U.S. Nuclear Regulatory Commission 631 Park Avenue i

King of Prussia, PA 19106 Dear Mr. Griers This L.E.R. refers to setpoint drift of a time delay rel y.

The governing Technical Specification is Table 3.2.B U. S. NUCLE AR REOULATORY COMMISSION LICENSEE EVENT REPORT CONTROL SLOCC l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI i

e R lP lA l P l B lS l 3 l@ito l0 l. l0 10 l0 l0 IO l-l0 10 l@64lt Il If l1l@l l l@

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UCENSE Tvet JJ 6 J CA T 64 CON'T E

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t 66 DOCutETNuuSER 64 Si EVENT C ATE 74 4

REPORT CATE So EVEN T DESCRIPTION AND PROS AeLE CONSEQUENCES h Ql while at power. during performance of a surveillance test the setnoint o

l of the "A" logic ADS time delay relav was found to be 33 seconds greater I

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than the Tech Spec Itmit of 120 seconds. Sa fe ty significance was i

O s I minimal since the redundant "B" logic was operable, l

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Ql The cause was setpoint drift on CE Model CR 2820 time delay relav. The I

i, l time delay relay was immediately readjusted. tested satisfactortiv. and i

gl returned to service.

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