ML20038C693

Significant Deficiency Rept SD 413/81-27 Re Water in Electrical Area Terminal Cabinet 1EATC-3,initially Reported 811117.No Apparent Damage to Eight Cutler-Hammer Relays. Relays Will Be Replaced.Completion Expected by 820401

ML20038C693
Person / Time
Site:	Catawba
Issue date:	12/04/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, SD-413-81-27, NUDOCS 8112140045
Download: ML20038C693 (2)

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' Vicr PatsicrNr , TELgpwomc; Anta 704 src. P ooucv.o= December 4, 1981 373-es s Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Comission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: Catawba Nuclear Station Unit 1 Docket No. 50-413

Dear Mr. O'Reilly:

Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency

. Report SD 413/81-27.

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William 0. Parker, Jr RWO/php Attachment cc: Director Mr. Robert Guild, Esq.

Office of Inspection and Enforcement Attorney-at-Law U. S. Nuclear Regulatory Comission 314 Pall Mall Washington, D. C. 20555 Columbia, South Carolina 29201 Resident Inspector-NRC Palmetto Alliance 75 s Catawba Nuclear Station 2135b Devine Street MW{T,,s//'N '

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CATAWBA NUCLEAR STATION REPORT N0.: SD-413/31-27 REPORT DATE: December 4, 1981 FACILITY: Catawba Nuclear Station - Unit 1 IDENTIFICATION OF DEFICIENCY:

Water in electrical area terminal cabinet - lEATC-3 INITIAL REPORT:

On November 17, 1981 Al Ignatonis @RC Region II, Atlanta, Georgia) was notified of the deficiency by W. O. Henry, R. T. Amos, and J. H. Lanier,of Duke Power Company, Charlotte, North Carolina.

SUPPLIER AND/0R COMPONENT:

The components subject to water damage were:

4 Cutler-Hammer D26MRD30Al relays 2 Cutler-Hammer D26MRD70Al relays 1 Cutler-Hammer D26MR80A relay 1 Cutler-Hammer D26MR40A relay DESCRIPTION OF DEFICIENCY:

During an unscheduled inspection it was noticed that water from a core-drilling machine on the floor above was dripoing into electrical area terminal cabinet 1EATC-3. Normally this water would not have penetrated the cabinet, but in this instance, the left door was open. The components subjected to the water were investigated. This included terminal blocks, fuse blocks, fuses, relays, flaser units, and sockets. The investigation indicated the relays were the only com-ponents subject to potential damage.

ANALYSIS OF SAFETY IMPLICATIONS:

If undetected and the relays had failed, they could have caused nisoperation of components in a single train of the following systems: Reactor Coolant Pump Monitoring, Auxiliary Feedwater, Containment Air Return and Hydrogen Skimming System, and Liquid Waste System.

CORRECTIVE ACTIONS:

Although there was no apparent damage to the eight Cutler-Hammer relays, they will be replaced as a precautionary measure. It is estimated that this work will be accomplished by April 1, 1982.