[2D09-14] Fast Reactor

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)

[2D10] Development of Safety Design Technologies for Sodium-Cooled Fast Reactor Coupled to Thermal Energy Storage System with Sodium–Molten Salt Heat Exchanger(8) Study on Improvement of Heat Transfer Performance of Heat Exchangers

*Masaaki Hayashi¹, Hirotaka Nakahara¹, Keita Endo¹, Hajime Miyata¹, Hidemasa Yamano² (1. HGNE, 2. JAEA)

Keywords:

sodium-cooled fast reactor,thermal energy storage system,nitrate molten salt,heat exchanger,computational fluid dynamics analysis

As part of the development of safety design technology for sodium-cooled fast reactor coupled to thermal energy storage system (SFR with TES) with sodium–molten salt heat exchanger, the present study investigates the optimization of the heat exchanger type between sodium and molten salt, and the measures to improve heat transfer performance. Computational Fluid Dynamics (CFD) analyses were carried out using models that reflected expected measures to improve heat transfer performance, and their effectiveness was confirmed. Based on the results of CFD analysis, this presentation discusses the study on the accuracy of heat transfer performance evaluation and the effects of measures to improve heat transfer performance.