[1M01-03] Cesium Behavior, Hydrogen Generation

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[1M01] Development of Technologies for Containing, Transportation and Storage of Fuel Debris(1)Development of Evaluation Method for Hydrogen Generation in Handling of Fuel Debris

*Kazuki Namba¹, Wataru Kawamura¹, Itaru Suzuki¹, Masanori Hatori¹, Ryuji Nagaishi², Atsuhiko Terada², AUNG THWE THWE², Tatsuya Ito², Toyonobu Nabemoto¹ (1. Tousou Mirai Technology Co.,Ltd., 2. JAEA)

Keywords:

Fuel debris,Water radiolysis,Hydrogen Generation G-value (Yield),Linear Energy Transfer (LET),Particle Size,Water Content

In the decommissioning of the Fukushima Daiichi NPS, the removal of fuel debris and its safe storage in a container is under consideration. Fuel debris removed from the reactor containment vessel is assumed to contain water, which may cause hydrogen gas generation due to radiolysis. Hydrogen generation is a common issue in various processes such as fuel debris treatment, storage, and water treatment, but the properties of the debris were unknown and had to be evaluated conservatively. In order to accomplish debris storage in a rational manner, it is desirable to systematically organize a method for evaluating the amount of hydrogen generation. In this report, we will introduce an overview of efforts to validate existing hydrogen generation evaluation models.