Development of Safety Design Technologies for Sodium-Cooled Fast Reactor Coupled to Thermal Energy Storage System with Sodium-Molten Salt Heat Exchanger: Project Overview

Abstract

Next generation innovative reactors have a new value of their flexibility with variable renewable energy. A sodiumcooled fast reactor (SFR) can make flexibility by coupling a thermal energy storage (TES) system with molten salt. New challenging items for the SFR coupled with TES are to develop safety design approach and a heat exchanger between sodium and molten salt. On that account, a three-year project has been performed to develop 1) a safety design approach and risk assessment methodology of the SFR with TES, 2) a performance evaluation technology of a heat exchanger between sodium and molten salt as well as heat transfer improvement measures, and 3) an evaluation technology of chemical reaction characteristic between sodium and molten salt as well as safety improvement measures. This paper describes the project overview and progress in JFY2022.