ML24318B507
| ML24318B507 | |
| Person / Time | |
|---|---|
| Issue date: | 11/08/2024 |
| From: | Office of Nuclear Material Safety and Safeguards |
| To: | |
| References | |
| Download: ML24318B507 (1) | |
Text
Posted by: Todd Smith, Nuclear Regulatory Commission (NRC), United States of America INES EVENT RATING FORM Page 1 of 1 INES Event Rating Form (ERF)
Version 1 Sender's Name:
Todd Smith Sender's Organization:
Nuclear Regulatory Commission (NRC) (United States of America)
Event
Title:
Worker Overexposure Event Date:
2022-12-15 Location / Facility:
Gilroy, California/ SOFIE Event Country:
United States of America Event Type:
Radioisotope Processing/Handling Facility INES Rating:
2 - Incident (Final)
Rating Date:
2024-11-08 Impact on people and the environment Release beyond authorized limits?
No Overexposure of a member of the public?
No Overexposure of a worker?
Yes Impact on the radiological barriers and controls at facilities Contamination spread within the facility?
No Damage to radiological barriers (incl. fuel damage) within the facility?
No Degradation of Defence In-Depth?
No Other information Person injured physically or casualty?
No Is there a continuing problem?
No Event Description From September through December of 2022, a radioisotope processing facility had an equipment malfunction that caused syringes filled with Fluorine-18 to miss a shielding container and fall to the floor during production. During this time, workers retrieved the syringes by hand and manually loaded them into the shielded container. This change was not investigated by the radiation safety officer until after the occupational exposures were reviewed. One employee received an annual whole-body effective dose of 0.08 Sv (8.024 rem) which exceeded the U.S. regulatory limit for the annual whole-body effective dose of 0.05 Sv (5 rem). Extremity doses for the employee were below the U.S. regulatory limits. NMED Record 230077.
Rating Justification A Level 2 is warranted for exposure of a worker in excess of statutory annual dose limits. See Section 2.3.1 INES Users Manual 2008 Edition (IAEA-INES-2009) http://www-pub.iaea.org/MTCD/publications/PDF/INES-2009_web.pdf Press Release Attached:
No Technical Document Attached:
No Further Information on Web:
Contact Person:
Todd Smith Affiliation:
Nuclear Regulatory Commission (NRC)
Email:
todd.smith@nrc.gov Telephone:
+13018165100 Organization on Web: