ML20244C673
| ML20244C673 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 04/06/1989 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8904200334 | |
| Download: ML20244C673 (2) | |
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Dukelbuer Companyl (704) 875-4000,
McGuire NuclearStation PO Box 488 0
. Cornelius, NC 28031-0488 l:
DUKEPOWER
- April' 6, ~ 1989
-U.S. Nuclear Regulatory Commission-
- Document Control Desk
- Washington, D.C..'20555--
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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 pursuant-to Technical Specification (T.S.) 6.9.2?as specified by T.S. 3.3.3.10. 'The report concerns operability of the Unit 1 Vibration and Loose Parts Monitor.
Should.there be any questions concerning this matter, please contact Robert Sharpe of Duke Power _at McGuire Nuclear Station at-(704) 875-4447.
Very truly yours, A*6 gjg,-
.Hal B. Tucker lEK/bcb
~ Attachment, xc:
Mr. S.D. Ebneter American Nuclear Insurers i
Administrator, Region II~
c/o Dottie Sherman, ANI Library U.S. Nuclear Regulatory Commission The Exchange, Suit 245 101 Marietta St., NW,' Suite 2900 270 Farmington Avenue Atlanta, GA' 30323 Farmington, CT 06032
-INPO Records Center Mr. Darl Hood Suite 1500 U.S. Nuclear Reculatory Commission 1100 Circle 75 Parkway Office of Nuclear Reactor Regulation Atlanta, GA' 30339 Washington, D.C.
20555 M&M Nuclear Consultants Mr. P.K. Van Doorn l
1221 Avenue of the Americas NRC Resident Inspector j
New York, NY 10020 McGuire Nuclear Station j
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Duke Power Company McGuire Nuclear Station Special Report l
l Operability of the Vibration and Loose Parts Monitor
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On February 25, 1989 Operations personnel discovered that channel 8 of the l
Vibration and Loose Parts Monitoring System (VLPM) had a low noise level. A J
work request was written to investigate and repair the channel; however, it has not been possible to determine the actual cause of the failure due to the numbers of possible failures (e.g. bad cable, failed accelerometer, failed pre-amp, etc.) and due to the location of the components within the plant (all components are currently inaccessible due to the work associated with a tube leak on 'D' steam generator). The investigation and repair of the VLPM are scheduled to be completed during the current Unit 1 tube leak outage. Noise levels in this channel are lower (quieter) than normal and lower than surrounding channels.
If a loose parts condition did exist, a change in the noise level of this channel would be observed.
The VLPM is manufactured by Rockwell International and has had a history of not providing reliable service. Duke Design Engineering has conducted an investigation of the system which identified several design flaws and is presently pursuing a replacement for the existing VLPM.
The modification has been scheduled to be implemented for Unit 1 in 1991.
This item is not reportable to the Nuclear Plant Reliability Data System.
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