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

Internal contamination of a worker in a fuel pellets fabrication workshop

Print View Posted on: 07 February 2024

Event Date: 11 February 2020 Event Type: Fuel Fabrication Event Location: France, Melox – Orano Cycle – Marcoule INES Rating: 2 (Final)

The event occurred in the pelleting workshop, where mixtures of plutonium and uranium oxide powders are compacted into cylindrical pellets. These operations are carried out in glove boxes. While cleaning a glove box containing a compacting press, one of the gloves was punctured, causing atmospheric contamination of the working area. This contamination was detected by the room’s radiation monitors and the area was evacuated in accordance with the procedures in force.

One of the three people present in this room was contaminated. The CEA Marcoule medical service then took charge of this person.

Orano Cycle informed ASN of this event on 12 February, indicating that radio-toxicological analyses had been run to estimate the committed dose for this person.

These analyses, which lasted several months, show that the committed dose could exceed the annual dose limit set at 20 mSv. Therefore, on 24 June 2020, Orano Cycle reported this event as

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

Internal contamination of a worker in a fuel pellets fabrication workshop

Print View Posted on: 07 February 2024

Event Date: 11 February 2020 Event Type: Fuel Fabrication Event Location: France, Melox – Orano Cycle – Marcoule INES Rating: 2 (Final)

The event occurred in the pelleting workshop, where mixtures of plutonium and uranium oxide powders are compacted into cylindrical pellets. These operations are carried out in glove boxes. While cleaning a glove box containing a compacting press, one of the gloves was punctured, causing atmospheric contamination of the working area. This contamination was detected by the room’s radiation monitors and the area was evacuated in accordance with the procedures in force.

One of the three people present in this room was contaminated. The CEA Marcoule medical service then took charge of this person.

Orano Cycle informed ASN of this event on 12 February, indicating that radio-toxicological analyses had been run to estimate the committed dose for this person.

These analyses, which lasted several months, show that the committed dose could exceed the annual dose limit set at 20 mSv. Therefore, on 24 June 2020, Orano Cycle reported this event as

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

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

Worker exposure to X-ray generator

Print View Posted on: 02 February 2024

Event Date: 29 May 2021 Event Type: Irradiation/Accelerator Facility Event Location: Japan, Setouchi Works of Nippon Steel Corp., Hyogo Pref. INES Rating: 3 (Final)

On May 29, 2021, two workers were inspecting and calibrating the fluorescent X-ray adhesion meter (output 50kV x 40mA) at the Nippon Steel Setouchi Works in Himeji City, Hyogo Prefecture.
There are three main operations for irradiating X-rays with this device.
・ Power supply to this device
・ Increase the voltage and current of the X-ray tube
・ Open the shutter of the irradiation window.
These operations are usually performed on the control panel outside the irradiation room where the device is installed.
Initially, the two workers were working on the control panel outside the irradiation room, but when the calibration sample showed abnormal measures, they entered in the irradiation room with the device on power. There is no legal requirement for this facility to have interlocks, which cut off the power supply when the irradiation room door opens.
As the two workers in the irradiation room confirmed some deposits on the X-ray irradiation window of the device, one of

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

Radon Exposure at Boarding School

Print View Posted on: 26 January 2024

Event Date: 31 December 2019 Event Type: Other Event Location: United Kingdom, Kingswood School, Bath INES Rating: 2 (Final)

The incident occurred at a private boarding school where pupils, employees and their children had been exposed to high levels of radon gas in the atmosphere.

The two employees and their two children were exposed to the high radon gas levels as a result of working and living at the school. The five overexposed pupils studied and lived at the school during this time.

An investigation by the regulator (Health and Safety Executive) found that the school knew they had a radon problem as far back as 2007 when they carried out monitoring and installed some remediation to reduce radon levels. However, from 2010 to 2018 the school carried out no subsequent radon monitoring and had no systems in place to ensure radon control measures were adequate. Only following an intervention by the regulator in 2018 did the school find out about their previous radon problem when further radon monitoring and remediation was subsequently carried out to reduce radon

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