ML20055G216
| ML20055G216 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 07/12/1990 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9007200254 | |
| Download: ML20055G216 (2) | |
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Duke 1%urt Company Hn B. k nn
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lice President.
, Nuclear Prmfuction Charlotte, N C 28242 (704)373 4531 DUKE POWER July 12, 1990 U.S. Nuclear Regulatory Commission ATTNi Document Control Desk Washington, D. C.
20555
Subject:
McGuire Nuclear Station, Unit 1. Dochet No.' 50-369 Special Report Concerning Loose Parts Monitor Gentlement Pursuant to Technical Specification 6.9.2 as specified by TS 3.3.3.10, find attached the subject report.
If there are any questions, please contact. Steve LeRoy at 704-373-6233.
Very truly yours, W g}f
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.Ha1.B. Tucker-Attachment SE'}55 xc:
Mr.-S.D. Ebneter, Administrator U. S. Nuclear Regulatory Commission, Region II.
101 Marietta Street, NW, Suite 2900-Atlanta, Georgia 30323 Mr. D.S. Hood, Project Manager Office of Nuclear Reactor Regulation, USNRC Washington, D.C.
20555
.Mr. P.K. Van Doorn Senior Resident Inspector, USNRC McGuire Nuclear Station i
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'9007200254 900712 if
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+1" U.S. Nucitor R;gulstory-Commission
' ATTN: Document control Desk m
-July 12, 1990 Attachment
- g Duke Power Company McGuire Nuclear Station-, Unit 1
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Loose Parts Monitor Special Report On June 2, 1990, Operations personnel discovered that Channel'7 of the j
t Vibration and Loose Parts Monitor (VLPM) system had a low noise level. The likely cause'of.the channel. failure.is a bad or damaged sensor cable.
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was not possible to determine the definite cause of the failure because-these devices are located inside containment = preventing inspection during power operation.-
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1 The VLPH is manufactured by Rockwell International.- The VLPM has had a l
history of not providing reliable service.
Cables have had.a history.of' j
being:very susceptible to damage causing system failure. This system is
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currently scheduled to be1 replaced by a more reliable system during the next j
scheduled Unit i refueling outage in 1991.
In the. event this modification is noc implemented. repairs'will be made per work request no. 141364.
At:this.. time, no compensatory measures are planned or required.
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