ENS 46341

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v t e ENS Event
11:00 Oct 18, 2010
Title	Stuck Gauge Shutter
Event Description	On 10/18/10 at approximately 8:32 am, the site Radiation Safety Officer (RSO) was contacted by a radiation worker at the 80" Hot Strip Mill location, indicating that the shutter on one of the slab detection radiation gauges would not close. The worker was in the process of performing a semi-annual wipe test when the situation was noticed. The RSO directed site workers to barricade the area until he arrived. Upon arrival, the RSO conducted a survey of the area, compared the levels to a prior survey and found no significant difference in radiation levels. The RSO also performed a wipe test on the gauge and checked it with a survey meter and pancake probe, finding no detectable contamination. The radiation worker was directed to check the device counts using a survey meter and to compare them to counts on an adjacent gauge. The counts were similar, indicating proper function. A melted metallic material was noted adjacent to the gauge whose shutter would not close. The material was analyzed and it showed to be 90-95% lead. As a result, it is believed some shielding may have overheated and blocked the shutter open or debris entered the shutter arm blocking it from closing. Although radiation levels in the area are normal, the RSO will attempt to safely remove the gauge to a secure location until the device can be serviced by the manufacturer. The Cs-137 source is S/N 6326CM of a slab detection device manufactured by Ronan Engineering.

ENS 46341 +/-
Where
Arcelormittal Burns Harbor Burns Harbor, Indiana (NRC Region 3)
License number:	13-32670-01
Organization:	Arcelormittal Burns Harbor
Reporting

10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure
Time - Person (Reporting Time:+2.63 h0.11 days <br />0.0157 weeks <br />0.0036 months <br />)
Opened:	Chris Sarvanidis 13:38 Oct 18, 2010
NRC Officer:	Eric Simpson
Last Updated:	Oct 18, 2010
46341 - NRC Website
v • d • e

v t e Emergency Notification System
Arcelormittal Burns Harbor with 10 CFR 30.50(b)(2)
WEEKMONTHYEAR2015-06-04T12:30:00 [Table view]
[ENS list for Arcelormittal Burns Harbor]

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