ENS 45921

v t e ENS Event
04:00 May 12, 2010
Title	Lugs on Digital Filter Improperly Soldered
Event Description	A faulty Digital Control System Output Filter was discovered at Farley Nuclear Power station while installing it on the emergency feedwater Terry Steam Turbine. The problem only affects two plants: Farley Nuclear Power Station and San Onofre Nuclear Power Station. Farley replaced the filter before use. San Onofre had installed and used the filter, but they are replacing it. Description of Defect: Eyelets inserted into the printed circuit (p.c.) board to make connections from one side of the board to the other side were not soldered on the top side where the terminal block is installed. This may result in the connection being broken during tightening of the wire lug on the terminal block or if other stresses are applied to the p.c. board or terminal block. This defect is limited to output filter serial numbers 10009, 10010, 10011, and 10012. Engineering Evaluation and Recommendations: Failure can occur during assembly. The results of a seismic event are unknown. All 4 filters must be recovered and repaired. Locations of the 4 filters include Dresser-Rand, Farley Nuclear Station, and San Onofre Nuclear Generating Station.

ENS 45921 +/-
Where
Dresser Rand Wellsville, New York (NRC Region 1)
Organization:	Dresser-Rand
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+14.65 h0.61 days <br />0.0872 weeks <br />0.0201 months <br />)
Opened:	Joe Menichino 18:39 May 12, 2010
NRC Officer:	Charles Teal
Last Updated:	May 12, 2010
45921 - NRC Website
v • d • e

v t e Emergency Notification System
Dresser Rand with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2010-05-12T04:00:00 [Table view]
[ENS list for Dresser Rand]

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