ENS 45839

v t e ENS Event
04:00 Mar 9, 2010
Title	Faulty Modulation Index Control Circuit Board Used in a Power Supply
Event Description	The following is a summary of information received via fax: UCI [United Controls International] personnel witnessed system level functional testing of three [Modulation Index Control] MIC circuit boards in a spare unit on March 9-10, 2010 at the PSEG Nuclear LLC training center as part of the dedication process. Initially, the boards were accepted based on the test results but later irregularities were noticed on the output side of another card (reference oscillator) in the system. The Original Equipment Manufacture (Thomas & Betts) began troubleshooting the issue and determined that two resistors (R336 and R347) had one leg each terminated in the wrong location. Subsequent repair and testing confirmed this to be the issue and that once corrected, the irregularities were gone. The affected licensees are PSEG Nuclear LLC - Salem and Hope Creek Nuclear Generating Stations.

ENS 45839 +/-
Where
Thomas & Betts Tucker, Georgia (NRC Region 1)
Organization:	United Controls International
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+877.82 h36.576 days <br />5.225 weeks <br />1.202 months <br />)
Opened:	Robert Hale 16:49 Apr 14, 2010
NRC Officer:	Dong Park
Last Updated:	Apr 14, 2010
45839 - NRC Website
v • d • e

v t e Emergency Notification System
Thomas & Betts with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2010-03-09T04:00:00 [Table view]
[ENS list for Thomas & Betts]

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