[3K03-08] Sodium-Cooled Fast Reactors 1

[3K03] Study on Eutectic Melting Behavior of Control Rod Materials in Core Disruptive Accidents of Sodium-Cooled Fast Reactors

(19)Project Overview and Progress until 2019

*Hidemasa Yamano Yamano¹, Toshihide Takai¹, Shin Kikuchi¹, Yuki Emura¹, Hideo Higashi², Hiroyuki Fukuyama², Tsuyoshi Nishi³, Hiromichi Ohta³, Koji Morita⁴, Kinya Nakamura⁵ (1. JAEA, 2. Tohoku Univ., 3. Ibaraki Univ., 4. Kyushu Univ., 5. CRIEPI)

Keywords:Sodium-cooled fast reactor, Core disruptive accident, Boron carbide, Stainless steel, Eutectic reaction

It is necessary to simulate a eutectic melting reaction and relocation behavior of boron carbide (B4C) as a control rod material and stainless steel (SS) during a core disruptive accident in an advanced sodium-cooled fast reactor designed in Japan. On that account, a new project has been started to conduct eutectic melting experiments, thermophysical property measurement of the eutectic melt, and physical model development for the eutectic melting reaction. The eutectic experiments involve the visualization experiments, eutectic reaction rate experiments and material analyses. The thermophysical properties are measured in the range of liquid and solid states. The physical model is developed for a severe accident computer code based on the measured data of the eutectic reaction rate and the physical properties. This paper describes the project overview and progress until JFY2019.