ENS 53739
ENS Event | |
|---|---|
06:00 Nov 14, 2018 | |
| Title | En Revision Imported Date 12/17/2018 |
| Event Description | EN Revision Text: AGREEMENT STATE REPORT - RADIATION WORKER RECEIVES HIGH DOSIMETRY READING
The following report was received from the Arkansas Department of Health via email: The RSO reported at 1100 [CST], on November 14, 2018, that the dosimetry provider had reported to the licensee one radiation worker badge had received a possible exposure of 9,000 mR for the month of October. The dosimetry provider has stated the exposure was a dynamic exposure with atypical exposure to the badge. The licensee began to investigate the cause of the high reading. The worker had worked with other employees and had not worked independently during the month. Other workers had routine exposures for the month. The licensee requires workers to wear SRD's [Self Reading Dosimeter] while working in the restricted area. The worker's cumulative reading for the time period was 200 mR. The worker's ring badge had routine exposure readings. During investigation by the licensee, there was no recollection of the badge being separated from the worker during the month. During off hours, all dosimetry is stored with the worker's lab coats outside the restricted area. The licensee develops PET [Positron Emission Tomography] radionuclides for radiopharmaceutical research and development. Since the time period of the exposure cannot be determined, the Arkansas Program is reporting this event under RH-1502.b. of the Arkansas Regulations equivalent to 10 CFR 20.2202(b)(1) of the NRC Regulations. The licensee and the State continue to investigate. The State of Arkansas will update when additional information is known. Arkansas event number AR-2018-006.
The following update was received from the Arkansas Department of Health (Department) via email: The licensee provided a written report dated November 15, 2018, outlining the investigation performed to verify the overexposure reported. This report restated the requirements of additional dosimetry worn by the worker with no significant indication exposure above routine doses. The report also indicated that at no time during the month was contamination detected when conducting personnel surveys leaving the restricted area. The licensee continues to believe that the dose was only received by the badge and not to the whole body of the radiation worker. The licensee submitted its own dose estimate on December 3, 2018, in which the licensee calculated a possible contamination event of the badge that would provide the dose yet exclude dose to other measuring devices and could evade detection when exiting the restricted area. The Department has taken this dose estimate into consideration and is requesting that the October, 2018 dose for the radiation worker be reduced to 250 mrem. The Department considers this event closed. Notified R4DO (Taylor), NMSS Events Notification group, and INES (Milligan) by email. |
| Where | |
|---|---|
| 3D Imaging Drug Design Development, Llc Little Rock, Arkansas (NRC Region 4) | |
| License number: | ARK-1008-03214 |
| Organization: | Arkansas Department Of Health |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+30.03 h1.251 days <br />0.179 weeks <br />0.0411 months <br />) | |
| Opened: | Steve Mack 12:02 Nov 15, 2018 |
| NRC Officer: | Jeff Herrera |
| Last Updated: | Dec 14, 2018 |
| 53739 - NRC Website | |
3D Imaging Drug Design Development, Llc with Agreement State | |
WEEKMONTHYEARENS 537392018-11-14T06:00:00014 November 2018 06:00:00
[Table view]Agreement State En Revision Imported Date 12/17/2018 2018-11-14T06:00:00 | |