ENS Event | |
|---|---|
05:00 Dec 14, 2011 | |
| Title | Agreement State Report - Possible Extremity Dose Exceeding Annual Limit |
| Event Description | On 12/14/11, the licensee reported to Agency [Ma. Radiation Control Program] a potential dose exceeding the adult occupational shallow dose equivalent limit of 50 Rem to the extremities. Situation involved a researcher handling microcurie quantities of phosphorus-32. Licensee's initial estimate of worker extremity exposure is in the range of 47-59 rem during the previous six months. Worker monitored with a whole body dosimeter but not with an extremity dosimeter. Licensee investigation of researcher's experimental procedures and handling techniques, after researcher observed left index finger skin discoloration, led to the conclusion of potential dose exceeding annual regulatory limit. Individual restricted from further radioactive material handling. Experimental procedure changes implemented by licensee.
An investigation is ongoing. MA Event: 12-9924
The following information was received from the Commonwealth by email: On 12/19/11, the licensee reported a revised worker extremity exposure estimate of 40.15 rem. The Commonwealth [Massachusetts Radiation Control Program] considers this event to still be open. Notified the R1DO (Perry) and the FSME EO (Burgess).
The Agency [Commonwealth of Massachusetts] inspection of 1/13/12 consisted of interviews with subject worker and other licensee personnel, observation of subject work area, and review of reports and representative records. Licensee determined subject worker's assigned 2011 shallow dose equivalent to the extremity to be 43.41 rem. Agency and subject worker accepts licensee's determination that subject worker's exposure did not exceed annual occupational dose limit for adults. Skin discoloration no longer visible. The Agency considers this event to be NON-REPORTABLE and CLOSED. Notified R1DO(Cook) and FSME EO(McIntosh) |
| Where | |
|---|---|
| Masachusetts Institute Of Technology Cambridge, Massachusetts (NRC Region 1) | |
| Organization: | Ma Radiation Control Program |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+30.72 h1.28 days <br />0.183 weeks <br />0.0421 months <br />) | |
| Opened: | Anthony Carpentino 11:43 Dec 15, 2011 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Jan 30, 2012 |
| 47527 - NRC Website | |
Masachusetts Institute Of Technology with Agreement State | |
WEEKMONTHYEARENS 475272011-12-14T05:00:00014 December 2011 05:00:00
[Table view]Agreement State Agreement State Report - Possible Extremity Dose Exceeding Annual Limit 2011-12-14T05:00:00 | |