Radiation protection and occupational dosimetry

Find your indicators

Radiation protection and occupational dosimetry

By mobilising all local players, EDF has achieved continuous improvement in the protection of employees against ionising radiation.

In France, the average annual collective dose for all site workers, whether EDF or external company employees, has been halved in less than 10 years. In the United Kingdom, it has been reduced, mainly as a result of optimised governance of maintenance and repair work. In 2016, no site worker (EDF or subcontractor employee) in France, the United Kingdom or the United States registered an individual dose in excess of the regulatory threshold (individual dose over a rolling 12-month period).

Average collective dose (in man-sieverts per reactor)


Dose for all site workers (EDF and subcontractor employees).

This result was achieved by optimising worksites, reducing the volume of activities and significantly decreasing shutdown extensions.

EDF Energy

The current level is comparable with the average values recorded by operators of pressurised water reactors (PWR). EDF continues to apply its ALARA (as low as reasonably achievable) approach to controlling ionising radiation in view of upcoming major refits and the resulting volumes of work.

Given this situation, based on the levels already achieved, the future focus will be on those plants whose results need to be improved to be on a par with the best.

Constellation Energy Nuclear Group

(1) Advanced gas-cooled reactor: nuclear reactors developed in the United Kingdom.
(2) Pressurised water reactor: the most commonly used nuclear reactors worldwide.
(3) Boiling water reactor: power reactors used in some American power stations.