Conference paper Open Access
Guidez, Joel; Bodi, Janos; Mikityuk, Konstantin; Rineiski, Andrei; Girardi, Enrico
Following up the previous European projects EFR and CP-ESFR, a new Horizon-2020 project, called ESFR-SMART, was launched in September 2017. This project, starting from the CP-ESFR design, will apply the new safety rules taking into account the lessons learned from the Fukushima accident, in order to increase the safety level of this European Sodium Fast Reactor (ESFR). In order to reach these new safety objectives, propositions are made to simplify as much as possible the design by using all the positive features of the Sodium Fast Reactors (SFR), i.e. low coolant pressure; high level of natural convection; possibility of decay heat removal by atmospheric air; high thermal inertia and long grace time before the human intervention.
These new safety objectives are presented in the paper from viewpoint of severe accidents prevention, defence in depth principles, extreme natural events to take into account, mitigation measures, etc. In all the cases, even in case of severe accident, early or significant radioactivity release requiring evacuation of the population will be avoided.
This paper gives a first list of propositions about ESFR, e.g.:
In conclusion, the paper gives a first review of the new propositions to enhance the ESFR safety. Some of these safety measures need additional R&D work for validation and some of them will be assessed in more details at the next phases of the ESFR-SMART project. The compliance of this new design with all safety rules has not yet been established at this stage of the project and will be studied later in dedicated tasks.