ML20044G292

Special Rept 93-05:on 930413,Channel 8 of Vibration & Loose Parts Monitor,Mfg by Rockwell Intl,Declared Inoperable Due to Low Signal Level.Caused by Damaged Cable in Associated Monitor.Channel 8 Will Be Repaired During Next Outage

ML20044G292
Person / Time
Site:	Mcguire
Issue date:	05/20/1993
From:	Mcmeekin T DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
93-05, 93-5, NUDOCS 9306020287
Download: ML20044G292 (2)

Text

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Duke Pouer Company T C Mwnw i, -

.McGuire Nudeur Generation Department l' ice President 12700 Hagm Ferry knod (MG01A)

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Huntmrille. NC28076-8955 (704)875-4809 frx M

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DUKEPOWER May 20, 1993 U.S. Nuclear Regulatory' Commission Document Control Desk Washington, D.C.

20555

Subject:

McGuire Nuclear Station Unit 2 Special Report No. SR 93-05 Problem Investigation Process No.: 2-M93-0425 Gentlemen:

Attached is a Special Report concerning channel 8 of the Vibration and Loose Parts Monitor being found inoperable.. This Special Report'is being submitted per Technical Specification 3.3.10 and 6.9.2.

This event is considered to'be of no significance with respect to the health and safety of the public.

Very truly yours,

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T.C. McMeekin TLP/bcb Attachment xc:

Mr.

S.D.

Ebneter INPO Records Center Administrator, Region II Suite 1500 U.S. Nuclear Regulatory Commission 1100 Circle 75 Parkway 101 Marietta St., NW, Suite 2900 Atlanta, GA 30339

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Atlanta, GA 30323 l-l Mr. Victor Nerses Mr.

P.K. Van Doorn U.S. Nuclear Regulatory Commission NRC Resident Inspector Office of Nuclear Reactor Regulation McGuire Nuclear Station Washington, D.C.

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Special Report SR-93-05 Unit 2 Vibration ~& Loose Parts Monitor Operability of Channel 8 Associated Tech Spect 3.3.3.10 Related PIP's:

PIP 2-M93-0425 Cause of Malfunction:

Channel 8 (2MIMT5170, S/G 2D) of the Vibration & Loose Parts Monitor (V& LPM) was declared inoperable af ter it was discovered to have a low signal level by Operations on April 13, 1993. WO 93029919 was initiated and channel investigated by IAE.

Low.

signal level was verified.

The cause of the low noise level is damaged or bad cable to the associated sensor or ' poor cable.

terminations.

Instrument Vendor V& LPM manufactured by Rockwell International Generic Concerns:

The V& LPM has a history. of unreliable performance. Specifically, numerous sensor cable and termination problems have been experienced due to their susceptibility to damage during installation or nearby maintenance activities.

Compensatory Heasures:

No compensatory measures are planned 'or required.

Plans for Restoring Operability:

Channel 8 of the V& LPM will be repaired under WO 93029919 during the next Unit 2 refueling outage (2EOC8) when cables and terminations are accessable.

Future Plans for V& LPM:

NSM's MG-12096 (Unit 1) and MG-22096 (Unit

2) are scheduled for completion during lEOC9 and

2EOC9, respectively.

Implementation on these :.bM ' s will begin during lEOC8 and -2EOC8, respectiveli.

These NSM's will install a completely new system and address system failure trends.

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