ML20096H631
| ML20096H631 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/14/1992 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9205270317 | |
| Download: ML20096H631 (2) | |
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, n t!.al / u j$Q DUKEPOWER h1ay 14,1992 U. S. Nuclear Regulatory Commission A*lTN: Document Control Desk Washington, DC 20555
Subject:
Catawba Nuclear Station Docket Nos. 50-413 and 50-414 Special Report Meteorological hionitoring Instrumentation System Pursuant to Technical Specincation 3.3.3.4, find attached a Special Report concerning the
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inoperability of the Meteorological hionitoring Instrumentation System.
Very truly yours, (h.
M. S. Tuckman CRIJSRMETS.592 Attachment xc: S. D. Ebneter Regional Administrator, Region 11 R. E. Martin, ONRR W. T. Orders Senior Resident Ins}wetor J
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1 SPECIAl REPORT CATAWBA NUCLEAR STATION hieteorologleal Alonttoring Instnmientation S) stem inoperable On April 301992, during a non-routine surveillance, a malfunction of the Catawba Nuclear Station (CNS) hieteorological Instrumentation System, Automet V, was discovered.
Failure to restore the system to operable status within the required period of seven (7) days resulted in submitting this Special Report pirsuant to CNS Technical Specification 3.3.3.4.
At approximately 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> on April 30, 1992. CNS Instrument and Electrical (IAE) hiaintenance Persom el discovered a malfunction in the Automet V and initiated a work order for investigation and repair of the system. Investigation by CNS IAE hiaintenance Personnel tevealed that the Read Only hiemory (ROht) board had failed. I AE hiaintenance proceeded to replace the Automet V with a spare unit. Upon retrieving the spare unit, IAE hiaintenance noticed the ROh! board was missing from the spare unit. The controlling software is vendor supplied and cannot be modified by Duke personnel. A review of the system files revealed that this has happened in the past on two other occasions and the system was sent back to the manufacturer to be reprogrammed. Subsequent discussions with the manufacturer indicated that the chips on the board are not manufactured anymore and that the manufacturer does not have the capability of reprogramming the ROh! board.
Duke Power Company is currently evaluating three options to restore the meteorological instrumentation to operable status:
- 1) Ship both units back to the manufacturer to have new boards built for the Automet V.
2)
Allow the Operator Aid Computer (OAC) to perform the function of the Automet V either by:
a.
Adding additional cabling from the meteorological tower to the control room.
OR b.
Adding an analog to digital transmitter and receiver to multiplex the eight channels of data over the existing cable.
The meteorological data is currently being stored and accessed through a back up system, Environmental Data Imgger (AQht 8000B). The meteorological data is available in the Technical Support Center, to Environmental Services in the OAC room via the VAX, and to Component Engineering at the hieteorological/ Environmental Tower (h1ET).
The above options will be evaluated and implemented expeditiously to restore the hieteorological hionitoring Instrumentation System to operable status.
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