ML20039D317

LER 81-023/01T-0:on 811209,four Gray safety-related Cables Which Did Not Meet Channel Separation Criteria,Discovered on 811125,determined Reportable.Caused by Improper Original Field Installation.Installation Corrected

ML20039D317
Person / Time
Site:	Oconee
Issue date:	12/23/1981
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20039D311	List: ML20039D310 ML20039D317
References
LER-81-023-01T, LER-81-23-1T, NUDOCS 8112310519
Download: ML20039D317 (1)

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EVENT OtScalMCM AMC P ACS A.63 CONSECUSMCSS ITTTl i On November 25, 1981, four grav @ safety-related cables which did not meet ,

12 2+ 1 eknnnel separation criteria were discovered in the Unit 1 cable shaft. It was I io.3 idetermined that this incident was a reportable occurrence at 1535 on December ,

,,,,,,9, 1981. Since the cables were not physically separated, the potential existed for an electrical fault in one safety channel to cause an electrical fault in

,,,,7 a redundant channel. This violates the single failure criteria of safety sys-

,,,,, , tems. Based on the fact that no f ailure occurred, the health and safety of the ,

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i Ausa casesimen ao e:manenvs Ac :cus @ improper original field installation: of the

,, ,,,i This incident was the result or t . 1I four grav cables and several vellow cables. The four crav saferv-reinted '

,,,,,jcables were pulled back to the location of the cross-channeling and properly ,

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