ENS Event | |
|---|---|
04:00 Jun 7, 2005 | |
| Title | Part 21 Report Involving a Potential for Premature Failure of Control Rod Instrumentation Power Supply |
| Event Description | Ametek Solid State Controls produces AC-DC power supplies that are used at several nuclear power plants. Ametek states that its Series AC-DC power supplies may have a problem with premature failure. The specific Model Numbers affected are as follows:
85-RP1510-00 85-RP4804-00 85-RP4808-00 85-RP DUAL-4807\1 Ametek states that an intermittent loss of continuity in a magnet wire connector may cause overheating in a lug and transformer which could eventually result in a premature failure of the power supply ( within approximately two years of initial service). The problem was discovered during testing of a power supplies by Ametek. No nuclear power plants have reported any problems with the power supplies. Ametek states that its records indicate that these power supplies were supplied to Braidwood, Byron, and DC Cook. Ametek believes that the power supplies are used for control rod instrumentation. A total of 33 power supplies have been sold but Ametek believes that most of these are not in service. Ametek recommends that these power supplies either be returned to Ametek for rework or that the affected sites request a service by an Ametek representative onsite. |
| Where | |
|---|---|
| Ametek Solid State Controls Columbus, Ohio (NRC Region 3) | |
| Organization: | Ametek Solid State Controls |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+77.12 h3.213 days <br />0.459 weeks <br />0.106 months <br />) | |
| Opened: | Bob George 09:07 Jun 10, 2005 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Jun 10, 2005 |
| 41761 - NRC Website | |
Ametek Solid State Controls with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 417612005-06-07T04:00:0007 June 2005 04:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Report Involving a Potential for Premature Failure of Control Rod Instrumentation Power Supply 2005-06-07T04:00:00 | |