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Investigation of failures of two NUS instr … 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 hours 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.</br>The affected facilities are: Fitzpatrick, Indian Point 2 and 3, Pilgrim, Beaver Valley, Duane Arnold, and Watts Bar.eaver Valley, Duane Arnold, and Watts Bar. +
06:00:00, 28 October 2004 +
41,156 +
14:37:00, 28 October 2004 +
06:00:00, 28 October 2004 +
Investigation of failures of two NUS instr … 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 hours 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.</br>The affected facilities are: Fitzpatrick, Indian Point 2 and 3, Pilgrim, Beaver Valley, Duane Arnold, and Watts Bar.eaver Valley, Duane Arnold, and Watts Bar. +
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