ASN Report 2020

and external hazard risks, improvements in the handling of emergency situations; ∙ a Nuclear Rapid Intervention Force (FARN) which, using mobile means external to the site, can intervene on a nuclear site in a pre-accident or accident situation; ∙ a local emergency centre allowing emergency management of the nuclear site as a whole in the event of an extreme external hazard; ∙ a “hardened safety core” of material and organisational measures which, in the event of an extreme external hazard, is designed to: ‒ prevent an accident with fuel melt, or limit its progression; ‒ limit large-scale radioactive releases; ‒ enable the licensee to carry out its emergency management duties. ASN added to its requests with a range of resolutions dated 21 January 2014 aiming to clarify certain design provisions for the “hardened safety core”, in particular the definition and justification of the extreme external natural hazard levels to be considered for the “hardened safety core”. More generally, ASN’s requests are also part of a continuous process to improve safety with regard to the targets set for the third-generation reactors, and aim in addition to be able to cope with situations far beyond those normally considered for this type of installation. These requests are issued in application of the “Defence in Depth” approach and as such concern measures to prevent and mitigate the consequences of an accident, based on both additional fixed GRAPH 6 Number and percentage of workers per dose range (in mSv) for 2020 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 15 to 20 10 to 15 6 to 10 5 to 6 2 to 5 1 to 2 0.5 to 1 0.001 to 0.5 10.46% 10.10% 0.19% 0.00% 2.48% 1.58% 10.10% 65.09% 4,103 3,961 73 0 974 618 3,962 25,529 Number of persons Dose range (mSv) Source: EDF. This graph includes radiation protection data for the Fessenheim NPP. GRAPH 7 Trend in mean individual dose according to the categories of trades of the workers in the Nuclear Power Plants 0 0.5 1.0 1.5 2.0 2.5 3.0 Risk prevention Welding Auxiliaries Mechanical Expert appraisal Tests Electricity Checks- inspections Thermal insulation Administrative 2017 2018 2019 2020 Mean dose (mSv) Source: EDF. This graph includes radiation protection data from the Fessenheim NPP. 310 ASN Report on the state of nuclear safety and radiation protection in France in 2020 10 – THE EDF NUCLEAR POWER PLANTS