ENS Event | |
|---|---|
19:20 Mar 12, 2024 | |
| Title | Missing Shutter |
| Event Description | The following information was received by the Minnesota Department of Health (MDH) via email:
On March 12, 2024, at 1539 CDT, the licensee contacted MDH to report a gauge with a missing shutter. During their routine semiannual inventory and shutter check, the licensee discovered a Texas Nuclear model 5190 fixed gauge that was missing its shutter. The gauge contained a 100 mCi Cs-137 source (decayed to 35 mCi). The gauge was equipped with a removable shutter, and the licensee assumes that it had become loose and detached from the device due to normal operating vibration. The event was discovered at approximately 1420 on March 12, 2024. The licensee stated that they had a spare shutter and were able to install it on the gauge. The gauge was installed and operating when the missing shutter was discovered. Therefore, no abnormal radiation field or exposure occurred due to the missing shutter. At the time of the call, the licensee had not yet located the missing shutter. This gauge is used for density measurements on their tailings clarifier underflow pump. Minnesota State Event Report Number: MN240002 |
| Where | |
|---|---|
| Northshore Mining Company Silver Bay, Minnesota (NRC Region 3) | |
| License number: | 1080 |
| Organization: | Minnesota Department Of Health |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+15.37 h0.64 days <br />0.0915 weeks <br />0.0211 months <br />) | |
| Opened: | Tyler Kruse 10:42 Mar 13, 2024 |
| NRC Officer: | Kerby Scales |
| Last Updated: | Mar 13, 2024 |
| 57027 - NRC Website | |
Northshore Mining Company with Agreement State | |
WEEKMONTHYEARENS 570272024-03-12T19:20:00012 March 2024 19:20:00
[Table view]Agreement State Missing Shutter 2024-03-12T19:20:00 | |