ENS Event | |
|---|---|
06:30 Jul 22, 2010 | |
| Title | Nuclear Gauge Dislodged from Steel Caster and Later Retrieved |
| Event Description | After completion of casting operations at the #1 Slab Caster, a trained worker proceeded to the mold strand area to remove the Berthold Co-60 rod source from the mold and place it in proper storage. The source is 3.97 mCi [Co-60] and is used to measure mold level of liquid steel. After all machinery and equipment was moved away from the mold so it could be accessed, the trained worker removed the plug to access the source for proper removal. Upon removing the plug, the trained worker noticed dirt and debris in the opening so he used compressed air to clean the area. The force of the compressed air into the source opening caused the source rod to lift out of the seated position and drop approximately 10 feet into the mold. The trained worker and a co-worker were able to retrieve the rod and place it back into its appropriate source holder. Investigation and exposure calculations indicated that neither employee was exposed above regulatory limits.
The licensee performed exposure calculations and estimated the trained radiation worker received a dose to the hands of 10.2 mRem. The assistant (not a trained radiation worker and not carrying dosimetry) received a calculated dose to the hands of 0.12 mRem. |
| 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:+344.72 h14.363 days <br />2.052 weeks <br />0.472 months <br />) | |
| Opened: | Chris Sarvanidis 15:13 Aug 5, 2010 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Aug 5, 2010 |
| 46154 - NRC Website | |
Arcelormittal Burns Harbor with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 511222015-06-04T12:30:0004 June 2015 12:30:00
[Table view]10 CFR 30.50(b)(2) Stuck Gauge Shutter ENS 463412010-10-18T11:00:00018 October 2010 11:00:00 10 CFR 30.50(b)(2) Stuck Gauge Shutter ENS 462052010-08-24T14:15:00024 August 2010 14:15:00 10 CFR 30.50(b)(2) Level Detection Gauge Shutter Control Rod Disengaged ENS 461542010-07-22T06:30:00022 July 2010 06:30:00 10 CFR 30.50(b)(2) Nuclear Gauge Dislodged from Steel Caster and Later Retrieved 2015-06-04T12:30:00 | |