ML20096A876

Special Rept:On 951120,during Periodic Surveillance Testing, Lpms Channel 5 Declared Inoperable.Caused by Erratic Preamp Bias Voltage Indications.Work Request 95048483 Initiated to Perform Corrective Maint During Unit 1 Cycle 9

ML20096A876
Person / Time
Site:	Catawba
Issue date:	12/18/1995
From:	Mccollum W DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9601110125
Download: ML20096A876 (1)

Text

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Lil . 1 Dukekwr Company : . .

WtutorR McCOLu n la

Cyatel>a Nuclear Generation &partment -

l' ice 1%sident - .

200 ConcordRoa<t (8mJul4:00 office

' York;SC2976 ' (SW)D14L'61;u L DUKEPOWER December 18, 1995

- U. S. ? Nuclear Regulatory . Commission . '

1. , ATTN': - Document Control Desk-Washington, DC 20555

Subject:

Catawba Nuclear Station, Unit 1 .

. Docket No. 50-413 >

Special Report 1; r Vibration and Loose-Parts Monitoring System i

On November 20, 1995, Loose Parts Monitoring System (LPMS) Channel 5

-(Upper Rx Vessel at 120 Deg) was declared inoperable due to erratic Preamp

[ Bias Voltage indications. This was discovered during periodic surveillance -

1 testing per PT/0/B/4600/03.

The alarming capability of Channel' 5 was disabled and the channel was  ;

• entered into Technical Specification Action Item Logbook '(#C1-95-01807) . as inoperable. Problem Investigation Process (PIP) 1-C95-2245 has been initiated

" for' tracking purposes;- work request 95048483 has been initiated to perform corrective maintenance on this instrumentation. This work will be performed during Unit 1 Cycle 9. Redundant monitoring of the upper vessel data collection region is afforded by LPMS Channel 6 (Upper Rx Vessel 240 Deg).

Since this channel has been inoperable for 30 days, this report is submitted pursuant Selected Licensee Commitment 16.7-4 and Technical Specification 6.9.2. ,

Very truly yours, fW W. ' R. McCollum KEN /SR121895. LPM Attachment u

' xc: . S. ' D.~ . Ebneter, Regional Administrator R'. E. Martin, ONRR' -

R.' 'J. Freudenberger, ' SRI  ;

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