ML20010E744

LER 81-125/03L-0:on 810728,Channel 4 Overtemp Delta T Instrumentation of Reactor Protection Sys Found Out of Calibr.Caused by Faulty Card in Overtemp Delta T Solid State Circuitry.Card Replaced

ML20010E744
Person / Time
Site:	McGuire
Issue date:	08/24/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010E741	List: ML20010E740 ML20010E744
References
LER-81-125-03L, LER-81-125-3L, NUDOCS 8109080214
Download: ML20010E744 (1)

Text

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,3,: !(While in Mode 5, during the perfo ance of a periodic functional test of the rep actor protective system, the Channel 4 overtemperature Delta T instrumentation

, ,,, ;was found to be out of calibration and subsequently declared inoperable per T.S.

3.3.1 which is reportable pursuant to T.S. 6.9.1.ll(b). Since failures of this

,34, ,9 nature are provided for in the design of the redundant protective channels, the incident did not restrict the functional capability of the reactor protective

,,,,,, system or affect the health and safety of the public.

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!,,ailThe cause was determined to be a faulty card in the overtemperature Delta T soh-

, , , , , g id state circuitry. Channel 4 was placed in the tripped condition (2 out of 3 ,

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NAME C, p4gMMgM Phillip B. Nardoci ,,,

(704) 373-7432 0109080214 810824 PDR ADOCK 05000369 S PDR ,. - . - - _ . . , -- --. _ . - _ . . - . - _ - -- _ _ - - _ _