The business manager is responsible for the radioprotection of his/her workers who are liable to be exposed to ionising radiation in their establishment. This provision is also aimed at self-employed workers who are responsible for their own radiation monitoring.
In this context, each worker who is liable to receive an annual radiation dose in excess of 1 mSv (milliSievert) must be subject to radiation monitoring.
To this end, the Radiation Protection Division makes available individual dosimeters for each worker exposed and ensures the monthly reading of the badges at the expense of the business concerned.Applications for dosimeters have to be completed by the business's administrator of dosimeters before the worker commences work.
Who is concerned
Any business that employs workers who are liable to be exposed to radiation must purchase dosimeters for them.
Nevertheless, workers who are liable to receive an annual radiation dose below 3 mSv (milliSievert) may, with the Radiation Protection Division's approval, not become subject to individual monitoring provided that the establishment has put in place an appropriate dosimetry monitoring system in the workplace or any other appropriate dose monitoring system.
Each worker who is working with radiation must undergo a pre-employment medical examination by an accredited practitioner (fit for radiation work) at the company's expense.
How to proceed
Submitting a request for a dosimeter
The administrator for dosimeters in the business must submit a duly completed and signed request for a dosimeter for each worker concerned to the Radiation Protection Division (Division de la Radioprotection).
Upon receipt of the request, the Radiation Protection Division will provide 2 dosimeters to the exposed worker. In order to avoid any confusion between the dosimeters to be worn on uneven months (January, March, etc.) and even months (February, April, etc.), the badges have different colours.
The dosimeters provided by the Radiation Protection Division are thermoluminescent dosimeters (TLDs) of the type "whole body" which are sensible to X-ray, gamma and beta radiation.
Using the dosimeter
Each worker will receive 2 dosimeters. While one of the dosimeters is worn and continues to monitor the radiation its carrier is exposed to, the radiation dose captured by the second dosimeter is evaluated by the dosimetry service (service de la dosimétrie) at the Radiation Protection Division, which ensures the continued monitoring of the exposed worker.
In practice, the exposed worker must wear one of the 2 dosimeters during one month.
At the end of each month, the worker must go to the administrator for dosimeters to swap the dosimeter worn, who will send it to the Radiation Protection Division for analysis.
The worker then wears his second dosimeter for one month, goes back to the company's administrator for dosimeters to swap it again with the first dosimeter, which he/she then wears during the following month. This cycle is repeated every month.
Each dosimeter is strictly personal and may under no circumstance be worn by another person than the one indicated on the badge.
The administrator for dosimeters in the business must ensure:
- that the dosimeters are regularly sent to the Radiation Protection Division, and;
- that each exposed worker swaps his dosimeter each month.
The Radiation Protection Division draws up and sends monthly dosimetry reports to the business within 40 days after the end of the monitoring period.
The report and the results must be made available to the workers concerned.
Cost for the use of dosimeters
Costs for the monthly analysis of dosimeters and the replacement of lost or broken dosimeters are billed to the business:
- EUR 4 for the monthly analysis of one dosimeter;
- EUR 49 for the replacement of a lost or broken dosimeter.
Other monitoring requirements
Where needed, the Radiation Protection Division can request that a second system of radiation monitoring (e.g. extremity dosimeters) or alarm or immediate dose reading dosimeters must be worn in addition to the TLDs.
Moreover, each time workers are liable to receive significant internal contamination, the business manager must put in place an adequate system for monitoring radiation. The Radiation Protection Division then sets specific monitoring intervals for the analysis of radiation readings whenever there is a risk of significant internal contamination by taking into account the working conditions and the radionuclides concerned.