ML20147F431
| ML20147F431 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 03/03/1988 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8803070347 | |
| Download: ML20147F431 (2) | |
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l Dmm POWER GOMPANY P.O. Box 33180 CHARLOTTE, N,0. 28242 HALB. TUCKER Tza.zenoxa vaca rassanswv (704) 373-4531 wuotaan peoptx. view March 3, 1988 U.S. Nuclear Regulatory Commission
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' Document Control Desk Washington, D.C.
20555
Subject:
McGuire Nuclear Station, Unit 1 Docket No. 50-369 Technical Specification 3.3.3.10 and 6.9.2 Special Report Gentlemen:
Please find attached a special report submitted pursuast to Technical Specifica-tion (T.S.) 6.9.2 as rpecified by T.S. 3.3.3.10.
The report concerns operability of the Unit i Vibration and Loose Parts Monitor.
Should there by any questions concerning this matter, please contact Steve LeRoy of Duke Licensing at (704)373-6233.
Very truly yours, Hal B. Tucker SEL/238/j gc Attachment xc:
Dr. J. Nelson Grace Mr. Darl Head Regional Administrator, Region II U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation 101 Marietta St., NW, Suite 2900 Washington, D.C.
20555 Atlanta, GA 30323 INPO Records Center Mr. W.T. Ordere Suite 1500 NRC Resident Ins >ector 1100 Circle 75 Parkway McGuire Nuclear Station
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Atlanta, GA 30339 l) 0803070347 880303
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PDR ADOCK 05000369 S
DCD l
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DUKE POWER COMPANY McGUIRE NUCLEAR STATION SPECIAL REPORT OPERABILITY OF THE VIBRATION AND LOOSE PARTS MONITOR On January 23, 1988 Operations personnel discovered that Channels 3, 4, and 8 of the Vibration and Loose Parts Monitor (VLPM) had unusual noise levels.
A work request was written to repair the system; however, it was not possible to determine the actual cause of the failure due to the number of possible fail-ures, (e. g. bad cable, failed accelerometer, failed pre-amp) and due to the location of the components within che plant, (all components are located ir, the Containment Building).
The VLPM will be repaired during the 1988 Unit 1 Refueling Outage or during an extended forced outage should one occur.
P es-ent noise levels are lower (quieter) than normal and lower than surrounding channels; therefore, Duke believes that there is no loose parts condition at McGuire.
If a loose parts condition did exist, higher noise levels it: chese channels would be observed.
The 7 LPM is manufactured by Rockwell International and has a history of not providing reliable service.
Duke Design Engineering has conducted an inves-tigation of the system and has identified several design flaws. Duke is pres-ently pursuing a replacement for the existing VLPM and an appropriate schedule for installation.
This item is not reportable to the Nuclear Plant Reliability Data System.