Irradiation/Accelerators Facility

Types of facilities

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Worker Overexposure

During an inspection in January 2016, the State of Florida noted that one of the licensee's employees working with a particle accelerator had exceeded the 50 mSv (5 rem) worker exposure limit for 2015 (overexposure nominally was 52 mSv (5.2 rem)). This employee also had nine high exposure investigative reports for 2015, and the Radiation Safety Officer had failed to take any action to mitigate exposure. Florida plans to conduct a follow up inspection to investigate the circumstances surrounding the worker overexposure. NRC EN51688

Category: Irradiation/Accelerators Facility United States of America »

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Realizing of maintenance activities without respecting the procedures

During maintenance activities that were conducted on some systems of one of the two irradiators present in the Sterigenic's installations, it was found that some safety-related equipment was unavailable. However, the availability of this equipment is requested as described in the procedure currently in application.

As this equipment was unavailable, Sterigenic's operators carried out those maintenance operations with only one safety device ensuring protection from a potential irradiation by the 60-Co sources that are used in the installations.

Category: Irradiation/Accelerators Facility Belgium »

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Irradiation of a worker during an intervention using gamma ray projector

During a weld inspection operation carried out by two employees of the Welding Institute on a worksite in Pau using gamma radiography equipment , the radioactive source of the gamma ray projector jammed inside its guide tube.

Using a metal rod found on site, one of the operators managed to free the jammed source and return it to the safe position in the body of the device. During this operation, the operator was directly exposed to the radiation emitted by the radioactive source.

Category: Irradiation/Accelerators Facility France »

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Overexposure of a service technician repairing a biplane X-ray system

While repairing a biplane cardiovascular X-ray system in a hospital, a service technician accidentally activated the system’s floor pedal. Moving a mobile lead shield, he did not realize that the shield was jamming the pedal. He continued his work under unnoticed exposure for about 5 minutes until the system alarm was automatically activated. Most of the time, the upper part of his body was very close to the lateral x-ray tube. He wore a lead apron during the exposure but he forgot to wear his dosimeter that day.

Category: Irradiation/Accelerators Facility Switzerland »

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Extremity Overexposure to Radiation Worker

One of the licensee's cyclotron operators received an extremity acute overexposure of 530 mSv (53.01 rem) to the right finger during the month of September as a result of cyclotron operations. The acute exposure brought the individual's total extremity exposure to 690 mSv (69 rem) for the year. The Regulatory Authority for this cyclotron, the State of Kansas, is continuing their investigation of the incident.

Category: Irradiation/Accelerators Facility United States of America »

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Overexposure of workers at irradiation facility - follow up

History

The gamma-irradiation facility (GIF), located in the town of Stamboliyski, was put into operation in 1980, charged with 49 sealed Co-60 sources with a total activity of 426 TBq. The GIF was owned by the Agricultural Academy and had been used for the irradiation of food and agricultural products, as well as for scientific experiments.

From 1997 till 2005 the GIF has not been used for its intended purpose and the sources were temporarily stored in the facility. In 2005, the sources were transferred for long-term storage to the Novi Han RAW Repository.

Category: Irradiation/Accelerators Facility Bulgaria »

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Overexposure to Radiation Workers

During loading of a 44.8 TBq (1210 curie) Co-60 source into an industrial irradiator at the licensee's New Jersey facility, approximately 10 cm of the 20 cm source somehow became dislodged for approximately 25 to 30 seconds, exposing two service personnel (radiation workers) and a radiation safety officer (RSO) the licensee had employed under reciprocity using a Pennsylvania license. The service personnel were working under the supervision and direction of the Pennsylvania licensee. The insertion tool prevented the workers from re-inserting the dislodged source quickly.

Category: Irradiation/Accelerators Facility United States of America »

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Worker over exposure

Dose in excess of regulatory limits to a worker operating in a bunker where a cobalt source was used, in Toulouse

On Wednesday 12th March 2008, a worker of the HIREX Engineering company working for the ONERA company was incidentally exposed during several minutes to a cobalt-60 source of high activity (18,5 TBq thus of category 1) (cf. ASN Notice of 18th March 2008 on www.asn.fr).

Category: Irradiation/Accelerators Facility France »

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Overexposure of employee in irradiation facility

Fleurus, Belgium is the site of a Sterigenics irradiation sterilization facility, performing principally medical device sterilization. The facility uses gamma radiation emitted from sealed cobalt 60 isotope source. The cobalt 60 source is strictly contained in a thick concrete containment vessel.
When not in operation, this source is stored in a water pool. A secured hydraulic system allows taking the source out of this pool in order to irradiate the products put in the cell. Safety locks prevent the system to take the source out of the pool when the door of the cell is open.

Category: Irradiation/Accelerators Facility Belgium »

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Potential Personnel Overexposure at Irradiator Facility

On April 21, 2004, an event occurred at an NRC-licensed panoramic wet-source-storage pool irradiator used for sterilization of medical supplies. The irradiator contains two source racks that operate simultaneously, each containing approximately 74 petabecquerel (2 million curies) of cobalt-60, for a total of 148 petabecquerel (4 million curies). The irradiator operator was experiencing problems with the source rack upper-limit switch (up-switch) and attempted to repair it. The up-switch’s function is to signal when the source racks are in the raised, exposed position.

Category: Irradiation/Accelerators Facility United States of America »