RSS feed source: International Atomic Energy Association--Nuclear & Radiological Events

Radiation worker exposure exceeding 10 times the annual limit

Print View Posted on: 27 November 2025

Event Date: 01 September 2025 Event Type: Irradiation/Accelerator Facility Event Location: Czech Republic, Roztoky u Prahy, museum INES Rating: 3 (Provisional)

The museum in Roztoky near Prague operates an irradiation chamber that is used to destroy insects in collection items with gamma radiation. For this purpose, a sealed radionuclide source of Co-60 with an actual activity of 127 TBq on the date of the event is used.

On 1. 9. 2025, a radiation worker was exposed to radiation by entering the irradiation chamber to bring another object into it for irradiation at a time when the emitter was extended in the working position and irradiation was taking place. The worker was moving in a field of ionizing radiation for about 1 to 2 minutes. The worker was equipped only with a personal film dosimeter, he left the operational dosimeter in the office. After closing the shielding door, he realized his mistake and reported the incident to his superior.
After evaluating the personal film dosimeter that the worker was wearing, an effective dose of 320 mSv was

Click this link to continue reading the article on the source website.

RSS feed source: International Atomic Energy Association--Nuclear & Radiological Events

Radiation worker exposure

Print View Posted on: 07 October 2025

Event Date: 13 January 2025 Event Type: Irradiation/Accelerator Facility Event Location: Czech Republic, Nuclear Physics Institute, Praha INES Rating: 2 (Final)

On 13. 1. 2025, the lcencee reported a radiation emergency when an unplanned radiation exposure of a radiation worker occurred. The worker was in the radiation room with a source of ionizing radiation – the Chisostat SO 1 irradiator, which contained a sealed radionuclide source (“URZ”) Co-60 with an activity of 30TBq as of 13. 1. 2025. At the time of the preparatory work, the source was not in a shielded position. The total time the worker spent in the radiation room during 2 entries (7. 1. 2025 and 13. 1. 2025) was about 12.5 minutes.

The investigation found that the last time the irradiator was used on 18. 12. 2024, it was incorrectly turned off. The irradiator was turned off by the main circuit breaker (not via the main control console), therefore the source was not put into the shielded position. It was also found that the backup power source (UPC), which would ensure the insertion of the

Click this link to continue reading the article on the source website.

RSS feed source: International Atomic Energy Association--Nuclear & Radiological Events

External contamination of a worker beyond the annual statutory limit to the skin

Print View Posted on: 05 August 2025

Event Date: 09 June 2025 Event Type: Power Reactor Event Location: France, CATTENOM-3 INES Rating: 2 (Final)

On 12 June 2025, the operator of the Cattenom nuclear power plant reported a significant radiation protection event concerning the exceeding of an annual individual dose limit by an EDF contractor.
On 9 June 2025, this contractor was installing lead matting in reactor building 3, which was shut down for partial inspection. During the check carried out at the exit of the controlled area, skin contamination was detected on the contractor’s cheek. The worker was immediately taken into care and the radioactive particle causing the contamination was removed.
The occupational physician assessed the dose received, taking into account the worker’s activities within the reactor building. This assessment showed that the dose received by the worker’s cheek exceeded the regulatory limit for the equivalent skin dose (500 mSv).
As soon as the contamination was discovered, the operator took action to identify its source. However, radiological checks carried out in the premises where the agent was present

Click this link to continue reading the article on the source website.

RSS feed source: International Atomic Energy Association--Nuclear & Radiological Events

External contamination of a worker beyond the annual statutory limit to the skin

Print View Posted on: 05 August 2025

Event Date: 24 July 2025 Event Type: Power Reactor Event Location: France, GRAVELINES-1 INES Rating: 2

On 25 July 2025, the operator of the Gravelines nuclear power plant reported a significant radiation protection event concerning the exceeding of an annual individual dose limit by an EDF contractor.
Reactor 1 at the Gravelines nuclear power plant was in shut down for maintenance and refuelling. During the night of 23 to 24 July, as part of radiographic testing of a pipe located in the reactor building, a worker was contaminated on the head. This contamination was detected at the exit of the reactor building during a radiological check.
The worker was taken care of by the changing room attendant in order to remove the radioactive particles, and then by the site’s medical service.
The occupational physician carried out a conservative assessment of the dose received, taking into account the worker’s activities within the reactor building. This assessment showed that the dose received by the worker’s neck exceeded the regulatory limit for equivalent skin dose (500

Click this link to continue reading the article on the source website.