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. |
| 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 | |
3M with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 463072010-10-04T14:30:0004 October 2010 14:30:00
[Table view]10 CFR 30.50(b)(2) Nuclear Process Gauge Misaligned 2010-10-04T14:30:00 | |