[1M01-03] Cesium Behavior, Hydrogen Generation

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[1M02] Development of Technologies for Containing, Transportation and Storage of Fuel Debris(2) Evaluation and Consideration of Hydrogen Behavior in Handling Powder Fuel Debris

*Ryuji Nagaishi¹, Atsuhiko Terada¹, Thwe Thwe Aung¹, Tatsuya Ito¹ (1. JAEA)

Keywords:

Powder Fuel Debris,Water Radiolysis,Hydrogen Generation G-value (Yield),Hydrogen Bubbles (Pools),Linear Energy Transfer (LET),Particle Size,Water Content

In the "Development of Technologies for Containing, Transportation and Storage of Fuel Debris", efforts have been made to develop methods for evaluating the amount of hydrogen (H₂) generated from lump-shaped debris, and we are now developing methods for powdered debris. The powdered debris will be generated during the cutting process of debris during retrieval, and some of it will be less than the size of fine sand (0.1 mm) and recovered in the liquid phase system. The state (shape) of this mixture of powdered debris and water would be in two possible states: a state similar to the zeolite packed bed in the Cs adsorption equipment (KURION, SARRY), and a state similar to the carbonate slurry waste in HIC at ALPS. For such powdered debris, which has small particle size close to the penetration distance of high-LET radiation (α) and high specific surface area, the H₂ behavior would be predicted to be different from that for the lump-shaped debris. In this report, we will introduce the evaluation and consideration of the behavior of H₂ generated by radiolysis of water in the powdered debris, which is being developed based on previous researches on contaminated water treatment.