05000369/LER-1981-051-03, /03L-0:on 810412,while in Mode 3,initial Fuel Loading,Train a of Solid State Protection Sys Declared Inoperable Due to Indications on Status Panel.Caused by Two Defective Circuit Boards.Boards Replaced

/03L-0:on 810412,while in Mode 3,initial Fuel Loading,Train a of Solid State Protection Sys Declared Inoperable Due to Indications on Status Panel.Caused by Two Defective Circuit Boards.Boards Replaced

ML20009C229
Person / Time
Site:	McGuire
Issue date:	05/12/1981
From:	Ouellette R DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C228	List: 05000369/LER-1981-051, Forwards LER 81-051/03L-0.Detailed Event Analysis Encl 05000369/LER-1981-051-03, /03L-0:on 810412,while in Mode 3,initial Fuel Loading,Train a of Solid State Protection Sys Declared Inoperable Due to Indications on Status Panel.Caused by Two Defective Circuit Boards.Boards Replaced
References
LER-81-051-03L, LER-81-51-3L, NUDOCS 8107200392
Download: ML20009C229 (1)

LER-1981-051, /03L-0:on 810412,while in Mode 3,initial Fuel Loading,Train a of Solid State Protection Sys Declared Inoperable Due to Indications on Status Panel.Caused by Two Defective Circuit Boards.Boards Replaced

Event date:
Report date:
3691981051R03 - NRC Website

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NRC PoRM *,64 U. S. NUCLEAR R ECULATORY CCMMassioN f177)

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8 60 41 QQCIL ET NUMagn 55 69 (VENT QATE 74 75 NEPCR T O ATE 80 EVENT CESCRIPT1CN ANo pro 8 A8LE CONSECUENCES lo#2l l While in Mode 3, initial fuel loading, Train A of the Solid State

,,,,,; Protection System was det'.ared inoperable because several erroneous permissive block indications appeared on the Control Room Status

,o is j i Panel. This is in violation of T.S.3.3.2 and required implementation

,,,,,, of the appropriate Action Statement as stated in T.S. Table 3.3-3.

Io fi1 i Since a fully redundant train was still operabla. the health and

.L safety of the public were not affected.

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CAUSE CESCMfPTION ANo CORRECnVE AC 1CNS tija #1 Two circuit boards were found to be defective due to temperature related degredation. The defective circuit

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