ENS 41411

v t e ENS Event
06:00 Feb 4, 2005
Title	Failure of Safety Equipment - Fixed Gauge
Event Description	The following information (Report # NE050003) was provided by the State of Nebraska (Julia Schmitt) via facsimile: Operators noticed that strand line #2 was showing erratic readings that were not consistent with the other three operating molds. Operations were suspended to investigate the cause. The assistant RSOs responded and observed that the gauge had separated between the top actuator flange and the shield housing. It was determined that the gauge's lead housing had separated from the flange, leaving approximately seven inches of the source rod unshielded. There was no visible exterior damage to the flange or housing. Leak tests and surveys were performed that verified that the gauge's actuator was locked-out. The device was removed from service and placed in an onsite storage vault awaiting analysis as to the cause of the failure. The licensee reporting this malfunction is Nucor Corporation, located in Norfolk, NE 68702. The source of radiation is a fixed gauge, model number P2608-100, manufactured by Berthold, and contained 0.003 curies of Co-60. The malfunctioned equipment is a fixed gauge, model number LB300 ML, also manufactured by Berthold. Ms. Schmitt believed the radiation exposure to personnel was < 2mrem/hr, however, this has not been determined as fact.

ENS 41411 +/-
Where
Nucor Steel Norfolk, Nebraska (NRC Region 4)
License number:	07-04-01
Organization:	Ne Div Of Radioactive Materials
Reporting

Agreement State
Time - Person (Reporting Time:+276 h11.5 days <br />1.643 weeks <br />0.378 months <br />)
Opened:	Julia Schmitt 18:00 Feb 15, 2005
NRC Officer:	John Knoke
Last Updated:	Feb 15, 2005
41411 - NRC Website
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