ML20215K371
| ML20215K371 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/11/1987 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8705110171 | |
| Download: ML20215K371 (2) | |
Text
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.. - - m DUKE POWER GOMPANY P.O. BOX 33180 CHAMLOTTE, N.C. 28242.
HAL B. TUCKER TeLt.pnown wwn rememeNr (704) GTJ-4531 NEELEAR PRODUCTION May 11, 1987 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555
Subject:
' Catawba Nuclear Station, Units 1 and 2 Docket Nos.50-413 and 50-414 Gentlemen:
Pursuant to Technical Specification 3.3.3.4, please find attached a Special Report concerning the Meteorological Monitoring Instrumentation System.
Very truly yours, Hal B. Tucker JGT/33/sbn 1
Attachment xc:
Dr. J. Nelson Grace, Regional Administrator U. S. Nuclear Regulatory Comission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commiission Washington, D. C.
20555 i
Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station 8703110171 870511 h
PDR ADOCK 05000413 g
PDR i\\
l l
Special Report Inoperability Of Meteorological Monitoring Instrumentation System On' April 16, 1987, a malfunction of the Catawba Nuclear Station (CNS)
Meteorological Monitoring Instrumentation was discovered. Failure to return the i
meteorological system to service within the required time of seven days resulted in implementing a non-routine report per CNS Technical Specification 3.3.3.4.
At approximately 0530 hours0.00613 days <br />0.147 hours <br />8.763227e-4 weeks <br />2.01665e-4 months <br /> on April-16, 1987, the shift Technical Advisor (STA) discovered the malfunction. At this time the STA initiated a work request to investigate and repair the system.
Inoperability of the system was caused by an internally generated software alarm which occurs intermittently and causes the central processing unit of Automet V to stop processing data.
Steps were followed per the manufacturers instruction manual; however, the problem reoccurred. The controlling software for the Automet V is a vendor supplied package which cannot be modified by Duke personnel. During discussions with the vendor several suggestions were provided in attempting to resolve the problem. None of these suggested methods were able to return the system to operation for more than a short period of time.
It required several days to troubleshoot this system because it had to be monitored over a period of. time to see if the problem would reoccur. While troubleshooting the Automet V computer-it was determined that the system had several failed cards.
The cards were replaced and the system functioned properly for approximately two days. After the two days, the system began generating the internal software alarm again. Duke Power personnel are now working on the spara unit in order to return the system to an operable status.
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