ENS Event | |
|---|---|
06:00 Oct 28, 2004 | |
| Title | Potential Defect Under 10Cfr21 |
| Event Description | Investigation of failures of two NUS instruments modules revealed that the Kepco power supplies used in the current output circuit failed. Further investigation by the manufacturer of the power supplies revealed that these failures were due to a manufacturing error - in some cases, a surface mount capacitor had been installed with reverse polarity. The capacitor is lightly loaded and takes up to 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> fail, so this problem will not usually be detected by functional testing or normal burn-in tests. The Kepco power supply with the failure is model number FCP-032K. Kepco has identified the manufacturing period of risk for the FCP-032K power supplies as being from April 2003 through July 2004; the period during which the surface mount capacitor was manually installed during a conversion to new automated manufacturing facilities. Not all Kepco FCP-032K power supply components are affected by this problem, nor are other Kepco power supply models.
The affected facilities are: Fitzpatrick, Indian Point 2 and 3, Pilgrim, Beaver Valley, Duane Arnold, and Watts Bar. |
| Where | |
|---|---|
| Scientech Llc Idaho Falls, Idaho (NRC Region 4) | |
| Organization: | Scientech Llc |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+8.62 h0.359 days <br />0.0513 weeks <br />0.0118 months <br />) | |
| Opened: | Martin Booska 14:37 Oct 28, 2004 |
| NRC Officer: | Bill Gott |
| Last Updated: | Oct 28, 2004 |
| 41156 - NRC Website | |
Scientech Llc with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 411562004-10-28T06:00:00028 October 2004 06:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Potential Defect Under 10Cfr21 2004-10-28T06:00:00 | |