ENS Event | |
|---|---|
15:01 Mar 27, 2024 | |
| Title | Unplanned Contamination |
| Event Description | The following information was provided by the licensee via telephone:
On March 27, 2024, at 1101 EDT, a sample containing 20.3 mCi of carbon-14 (C-14) in 1,3-Dichloropropene liquid form (348 microliters) was dropped when being removed from a storage container. The authorized user immediately called for assistance and restricted access to the laboratory where the spill occurred. Decontamination efforts began immediately after the incident, and it was confirmed that the contamination was contained to the laboratory where the spill occurred. It was determined on March 28, 2024, at 1025 EDT that restrictions would remain in place greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and that this incident was reportable under 10 CFR 30.50(b)(1). Following the spill, a nasal swab was taken of the worker with no detectable activity, however, a urine bioassay taken the following day indicated a potential internal dose of 213 mrem. No other staff were exposed, and there was no risk to public safety or the environment. The applicable 10 CFR 20 Appendix B annual limit for intake for C-14 is 2000 microcuries. Decontamination efforts will continue until detectable surface contamination is less than 1000 dpm/100 square centimeters.
The licensee submitted a 30-day written report for this event. Notified R3DO (Betancourt-Roldan) and NMSS Events (email). |
| Where | |
|---|---|
| Dow Chemical Midland, Michigan (NRC Region 3) | |
| License number: | 21-00265-06 |
| Organization: | Dow Chemical |
| Reporting | |
| 10 CFR 30.50(b)(1) | |
| Time - Person (Reporting Time:+21.9 h0.913 days <br />0.13 weeks <br />0.03 months <br />) | |
| Opened: | Kelly Wegener-Gave 12:55 Mar 28, 2024 |
| NRC Officer: | Adam Koziol |
| Last Updated: | Apr 26, 2024 |
| 57059 - NRC Website | |
Dow Chemical with 10 CFR 30.50(b)(1) | |
WEEKMONTHYEARENS 570592024-03-27T15:01:00027 March 2024 15:01:00
[Table view]10 CFR 30.50(b)(1) Unplanned Contamination 2024-03-27T15:01:00 | |