ML20247N884
| ML20247N884 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 05/30/1989 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8906060050 | |
| Download: ML20247N884 (2) | |
Text
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DUKE Pownn Godmov P.O.150X 33180 l
CIIAltLOTTE, N.C. 28242 HALH. TUCKER res.es siowe vmzenemmewr (704) 373-4531 wuos. man renovenom j
May 30, '989 U.S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555
Subject:
McGuire Nuclear Station, Unit 1 Docket No. 50-369 Vibration and Loose Parts Monitor Special Report Gentlemen:
Pursuant to Technical Specification (T.S.) 6.9.2 as specified by T.S.
3.3.3.10, find attached the subject special report.
Should there be any questions concerning this matter, please contact S.E. LeRoy at (704) 373-6233.
Very truly yours, B lu
,av Hal B. Tucker SEL/421 xc:
Mr. S.D. Ebneter, Administrator Mr. P.K. Van Doorn U.S. Nuclear Regulatory Commission NRC Senior Resident Inspector Region II McGuire Nuclear Station 101 Marietta St., NW, Suite 2900 Atlanta, Georgia 30323 Mr. Darl Hood Office of Nuclear Reactor Rege.lation U.S. Nuclear Regulatory Commission Washington, DC 20555 1NPO Records Center Suite 1500 1100 Circle 75 Parkway Atlanta, Georgia 30339 f,
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S.;oedment Control Desk May 30, 1989 Attachment Duke Power Company McGuire Nuc1 car Station Unit i Vibration and Loose Parts Monitor Special Report On April 18, 1989 channels 3,4,6,7, and 8 of the Vibration and Loose Parts Monitor were observed to have a low noise level. The cause of the possible failure is due to bad or damaged cables to the sensors on each affected channel.
A significant amount of work was performed in the areas around these cables during the forced Unit 1 Steam Generator Tube Rupture Outage.
The Vibration and Loose Parts Monitor (VLPM) were manufactured by Rockwell International. The VLPM cables have had a history of being susceptible to damage causing system failure.
Exact replacements for the cables used are no longer available from Rockwell International.
An acceptable substitute has been offered by Rockwell and approved by Duke Design Engineering, and have been ordered by McGuire personnel.
The failed cables are inside the containment building and are not accessible during unit operation. The VLPM will be repaired during the next refueling outage after the new replacements are received.
At this time, no com.pensatory measures are required or planned.
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