Abstract
Abstract A large 3600 MW-thermal European sodium fast reactor (ESFR) concept has been studied in a European Horizon-2020 project since September 2017, following an earlier European project. In the paper, we describe new ESFR core safety measures focused on prevention and mitigation of severe accidents. In particular, we propose a new core configuration for reducing the sodium void effect, introduce passive shutdown systems, and implement special paths in the core for facilitation of molten fuel discharge in order to avoid recriticalities after a hypothetical severe accident. We describe and assess the control and shutdown system, and consider options for burning minor actinides.
Highlights
IntroductionThis paper describes new core safety measures for a 3600 MWthermal European sodium fast reactor (ESFR) concept, studied
This paper describes new core safety measures for a 3600 MWthermal European sodium fast reactor (ESFR) concept, studiedManuscript received August 6, 2020; final manuscript received September 15, 2021; published online October 29, 2021
A large European sodium fast reactor concept has been studied in European projects since late 2000s
Summary
This paper describes new core safety measures for a 3600 MWthermal European sodium fast reactor (ESFR) concept, studied. Manuscript received August 6, 2020; final manuscript received September 15, 2021; published online October 29, 2021. The first 4-year project was a collaborative project for a European sodium fast reactor (CPESFR) [1] on studies of ESFR with both mixed oxide and carbide fuels. The project since 2017 is a Horizon 2020 project called European sodium fast reactor safety measures assessment and research tools (ESFR-SMART) [2], which continues to investigate the oxide fuel option. We refer to the initial ESFR concept with
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