ENS 46484
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ENS Event | |
|---|---|
20:00 Dec 13, 2010 | |
| Title | Research Reactor Radiography Incident |
| Event Description | On 12/13/10 at 1500 EST, North Carolina State University [NCSU] was conducting routine radiography with the reactor at 1MW when unknown to the technician, the shutter stuck open. The technician entered the shielded room and noticed the shutter wasn't closed and immediately left the exposure room. After the technician left the room and secured the area, he notified other personnel including the control room. NCSU reports that the reactor was shut down by the operator because of this event. After the reactor was shut down, personnel entered the room and closed the shutter. The shutter door interlock had malfunctioned due to a mechanical interference. It was noted that the technician was not wearing personal dosimetry. NCSU estimates (based on cameras and a re-enactment conducted with the technician) that the technician was exposed for a maximum of 18 seconds with a resulting dose rate of about 150 mRem.
NCSU corrective actions include a research reactor shutdown, closing of the radiography shutter, installing interlocks to prevent shielded room access with the shutter not fully closed, and safety training of personnel related to use of the radiography facility. NCSU is making this report in accordance with their research reactor technical specifications. |
| Where | |
|---|---|
| North Carolina State University Raleigh, North Carolina (NRC Region 2) | |
| License number: | R-120 |
| Reporting | |
| Non | |
| Time - Person (Reporting Time:+44.4 h1.85 days <br />0.264 weeks <br />0.0608 months <br />) | |
| Opened: | Gerry Wicks 16:24 Dec 15, 2010 |
| NRC Officer: | Vince Klco |
| Last Updated: | Dec 15, 2010 |
| 46484 - NRC Website
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North Carolina State University with Non | |
WEEKMONTHYEARENS 571962024-06-27T14:37:00027 June 2024 14:37:00
[Table view]Non Technical Specification (Ts) Reportable Occurrence ENS 565532023-06-02T12:18:0002 June 2023 12:18:00 Non Unscheduled Shutdown ENS 557472022-02-17T18:46:00017 February 2022 18:46:00 Non Technical Specification Violation ENS 527482017-05-10T21:00:00010 May 2017 21:00:00 Non Research Test Reactor - Technical Specification Violation ENS 464842010-12-13T20:00:00013 December 2010 20:00:00 Non Research Reactor Radiography Incident ENS 449912009-04-10T13:30:00010 April 2009 13:30:00 Non Violation of Limiting Conditions in Technical Specification 3.5B 2024-06-27T14:37:00 | |
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