ML20086H140

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Special Rept:On 950615,Channel 4 Was Declared Inoperable Due to Noise Uncharacteristic of Healthy Channel Detected Via Vibration & Loose Parts Monitoring Sys.Corrective Maint Will Be Performed During 1EOC9 Outage
ML20086H140
Person / Time
Site: Catawba Duke Energy icon.png
Issue date: 07/12/1995
From: Rehn D
DUKE POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9507180045
Download: ML20086H140 (1)


Text

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Dube1%wer Company D. L Rots o

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Catawba Nuclear Genemtion Department Vice President l.

4800 Concord Road (803)&313.Y5 Omce York, SC29745; (803)831342GFat DUKEPOWER July 12, 1995 i

j U. S. Nuclear Regulatory Commission l

ATTN: Document Control Desk I

Washington, DC 20555

Subject:

Catawba Nuclear Station, Unit 1 Docket No. 50-413 Special Report Vibration and Loose Parts Monitoring System

,On June, 15.,1995,. Channel 4. (Upper.Rx Vessel at 000. Deg.). was declared inoperable.

The inoperability determination was made by Operations personnel based upon audible monitoring of sensor response.

Noise uncharieteristic of a healthy channel was detected via this monitoring, although no alarms were actually generated. Problem Investigation Process (PIP) 1-C95-0950 has been initiated for tracking purposes; work request 1

95026973 (WO 95047168-01) has been initiated to perform corrective maintenance on this instrumentation. This work will be performed during 1EOC9 outage.

Redundant :nonitoring is afforded by Channels 5 (Upper Rx Vessell at 120 Deg.) and 6 (Upper Rx Vessel at 240 Deg.)

Since this channel has been inoperable for 30 days; it is reportable pursuant to Technical Specification 3.3.3.9.

Very truly yours, D. L. Rehn KEN /SR071295. LPM Attachment xc: S. D. Ebneter, Regional Administrator R. E. Martin, ONRR R. J. Freudenberger, SRI 9507180045 950712 PDR ADOCK 05000413 S

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