ENS 42551
ENS Event | |
|---|---|
04:00 May 4, 2006 | |
| Title | Part 21 Notification Involving Potential Defect in Aerovox Capacitor |
| Event Description | The following information was provided via email:
COMPONENT DESCRIPTION: 13uF X 1000V AC capacitors, SCI P/N 07-020139-00, Aerovox P/N H94S1013A0BA, manufactured between January 2004 and December 2004. Capacitors can be either installed in Ametek Solidstate Controls UPS equipment or provided as a spare part. The components are schematically identified as C805, C815, or C705. PROBLEM YOU COULD SEE: The capacitor failures due to this defect will occur early in the operating life of the device. There are no warning signs that a failure is imminent, or detection method for predicting an approaching failure. CAUSE: The investigation has revealed that the capacitor failures (date codes 0408 and 0436) were due to manufacturing defects. A failure analysis by Aerovox revealed that a foil tab connecting the capacitor winding to the internal terminal became pinched between the lid and the can during the seaming operation. Within the first year of operation, the insulation covering the connecting tab was cut through. This resulted in terminal to case short. EFFECT ON SYSTEM PERFORMANCE: The failures described above, could result in loss of output voltage and transfer of the static switch to the bypass source. The resulting failure could result in a potential damage to the load. ACTION REQUIRED: The observed failure rate of this component is very low at 0.06% (2 out of 3336 units manufactured between 1/1/04 and12/31/04.) Aerovox has implemented corrective actions to preclude further failures. Based upon the Aerovox evaluation, Ametek Solidstate Controls believes if a defect was present in a capacitor, the likelihood of a failure should occur early in the operating life. We feel the failure rate has been extremely low and the risk is minimal. Each operating facility will need to evaluate the potential risk to their operation. AMETEK SOLIDSTATE CONTROLS CORRECTIVE ACTION: If you wish to replace the capacitors Ametek Solidstate Controls will work with you to arrange replacements. Please contact Mrs. Jean Falor of our Client Services group at 1-800-222-9079 or 1-614-846-7500 ext. 6230. jean.falor@ametek.com. Rudimentary listing of stations that received this component installed in equipment or as a spare part: - Installed in equipment: Oconee, McGuire, Watts Bar, Browns Ferry, STP, Beaver Valley, San Onofre, Nine Mile Point and TMI. - Spare part: St. Lucie, Palo Verde, Surry, Turkey Point, Diablo Canyon, Harris, Crystal River, Robinson and Comanche Peak. - International: Korea Hydro, Nuklearna Elec Vrbina, China Nuclear, Laguna Verde and Electrobras. |
| Where | |
|---|---|
| Ametek Solidstate Controls Columbus, Ohio (NRC Region 3) | |
| Organization: | Ametek Solidstate Controls |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+9.38 h0.391 days <br />0.0558 weeks <br />0.0128 months <br />) | |
| Opened: | Robert George 13:23 May 4, 2006 |
| NRC Officer: | Steve Sandin |
| Last Updated: | May 4, 2006 |
| 42551 - NRC Website | |
Ametek Solidstate Controls with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 425512006-05-04T04:00:0004 May 2006 04:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Notification Involving Potential Defect in Aerovox Capacitor 2006-05-04T04:00:00 | |