ENS 53529
ENS Event | |
|---|---|
04:00 May 1, 2018 | |
| Title | Part 21 Notification - Potential Defect in Ac Voltage Sense Board |
| Event Description | COMPONENT DESCRIPTION:
277VAC Voltage Sense Board. PROBLEM YOU COULD SEE: In May of 2018, AMETEK Solidstate Controls (SCI) experienced failures during preventative maintenance with the 80-210833-90 AC Voltage Sense board during the startup of a unit. While the failures were experienced on commercial equipment, a version of the AC Voltage Sense printed circuit board is used in safety-related equipment as well. CAUSE: The failure of the AC Voltage Sense Boards is caused by the opening of the 100 OHM 2W R7 metal oxide resistor, AMETEK SCI part number 03-804103-00, due to insufficient peak power withstand capability for the application. In all instances of failures experienced, the peak inrush power dissipation during startup caused the 2W metal oxide resistor to open. Failures have been limited to the metal oxide resistor. EFFECT ON SYSTEM PERFORMANCE: If the 100 OHM, 2W metal oxide resistor in the R7 position (PN: 03-804103-00) of the AC Voltage Sense board experiences peak power above its rating and opens, the AC Voltage Sense board may fail. This failure could cause a false low AC voltage alarm and an inoperable high AC voltage alarm condition. During steady state operation, the resistor will not be exposed to power dissipation significant enough to impact the resistor. This potential defect and 10 CFR 21 notification applies to SCI safety-related 277VAC version of the AC Voltage Sense printed circuit board: 80-9210842-90 - PCB ASSY, VLT SENSE 277VAC, 1PH. ACTION RECOMMENDED: The R7 metal oxide resistor is being replaced in the 80-9210842-90 version of the AC voltage sense printed circuit board with a wire-wound resistor (PN: 03-804103-10). The AC Voltage Sense Board will be revised to revision level 'I'. AMETEK recommends replacing any prior revisions of the 277VAC AC Voltage Sense boards at the earliest convenience. AMETEK SOLIDSTATE CONTROLS CORRECTIVE ACTION: If you wish to replace the 277 VAC AC Voltage Sense Board with the latest revision, AMETEK Solidstate Controls will work with you to arrange replacements. Please contact Mr. Mark Shreve of our Client Services group at 1-800-222-9079 or 1-614-846-7500 ext. 6332. mark.shreve@AMETEK.com. AFFECTED CUSTOMERS The list below identifies all AMETEK Solidstate Controls customers who have purchased the printed circuit board 80-9210842-90 since 2008. Any purchases prior to 2008 should have been replaced according to the recommended preventative maintenance schedule and, therefore are not applicable to this 10 CFR 21 notification. China Nuclear, Edison Material Supply, Energy Northwest, Jade Dragon Trading, Korea Hydro & Nuclear Power Company Limited, KRSKO, Exelon Business Services - Braidwood Warehouse, Exelon Business Services - Braidwood/ Byron Generating Station, Georgia Power Company - Vogtle 1 & 2, Shenzhen Chance New Energy Scientific Instrument Co. |
| Where | |
|---|---|
| Ametek Solidstate Controls Columbus, Ohio (NRC Region 3) | |
| Organization: | Ametek Solidstate Controls |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+2100.23 h87.51 days <br />12.501 weeks <br />2.877 months <br />) | |
| Opened: | Ethan Salsbury 16:14 Jul 27, 2018 |
| NRC Officer: | Andrew Waugh |
| Last Updated: | Jul 27, 2018 |
| 53529 - NRC Website | |
Ametek Solidstate Controls with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 554532021-09-09T04:00:0009 September 2021 04:00:00
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