ENS 48089

v t e ENS Event
19:54 Feb 12, 2012
Title	Part 21 - Failed Auxiliary Contactor Affecting Diesel Generator
Event Description	On February 10, 2012, during the monthly testing of Diesel Generator 1 (DG-1), speed was raised from 500 RPM to 900 RPM. At approximately 750 RPM, the generator field did not 'flash', a term used to describe the normal voltage buildup in the field of a generator. Initial troubleshooting identified that the auxiliary contacts on the 2CR contactor did not close. This caused the field flash failure. The failure of the auxiliary contacts on the 2CR contactor prevented the diesel generator from performing its designed safety function. The specific part which fails to comply or contains a defect is General Electric CR105X300 auxiliary contactor. The auxiliary contactor was manufactured by General Electric Company and supplied by Nuclear Logistic, Incorporated, as an auxiliary part of a General Electric CR305 contactor. Further evaluation of the failure determined it to be reportable under 10CFR21 on June 8, 2012. The Corporate Officer was informed on June 13, 2012. The Regional Administrator was notified as required, but, due to an oversight, this report was not made to the Operations Center. The required 30 day report has been submitted (ML 121910230). The licensee has notified the NRC Resident Inspector.

ENS 48089 +/-
Where
Fort Calhoun Nebraska (NRC Region 4)
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+3591.33 h149.639 days <br />21.377 weeks <br />4.919 months <br />)
Opened:	Erick Matzke 10:14 Jul 11, 2012
NRC Officer:	Dong Park
Last Updated:	Jul 11, 2012
48089 - NRC Website Loading map...
v • d • e

v t e Emergency Notification System
Fort Calhoun with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR2012-02-12T19:54:00 [Table view]
[ENS list for Fort Calhoun]

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