ENS 46307

v t e ENS Event
14:30 Oct 4, 2010
Title	Nuclear Process Gauge Misaligned
Event Description	This is a report of failure of equipment to function as designed resulting in increased radiation levels. The equipment is an NDC [model 302] beta gauge, serial number 8996, containing a 200 mCi Kr-85 radioactive source. The gauge is installed on the 33 Coater at the Frame 4 position at the 3M Co. manufacturing plant, 3211 East Chestnut Expressway, Springfield, MO 65802. The gauge had been shut down last week when operators noted incorrect thickness readings. The gauge shutter was closed at that time. This morning, Oct. 4, 2010, at about 9:30 AM [CDT] maintenance personnel inspected the gauge. At that time they determined that the gauge heads were misaligned. The facility Radiation Safety Officer was contacted. It was further determined that the gauge shutter could be opened with the gauge heads in misaligned position. As the detector head serves as the beam stop with the shutter open this could result in personnel exposure. The RSO determined that no personnel were in the immediate vicinity of the gauge at the time when the incorrect readings were obtained and the shutter closed. Therefore there were no personnel exposures that resulted.

ENS 46307 +/-
Where
3M Springfield, Missouri (NRC Region 3)
License number:	22-00057-03
Organization:	3M
Reporting

10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure
Time - Person (Reporting Time:+1.88 h0.0783 days <br />0.0112 weeks <br />0.00258 months <br />)
Opened:	Fred Entwistle 16:23 Oct 4, 2010
NRC Officer:	Mark Abramovitz
Last Updated:	Oct 4, 2010
46307 - NRC Website
v • d • e

v t e Emergency Notification System
3M with 10 CFR 30.50(b)(2)
WEEKMONTHYEAR2010-10-04T14:30:00 [Table view]
[ENS list for 3M]

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