Presentation Information
[2G06]Development of Technologies for Containing, Transportation and Storage of Fuel Debris(4) Measurement of Sample Height Dependence of H2 Generation from Water Suspensions of Oxide Powders
*Tatsuya Ito1, Ryuji Nagaishi1, Thwe Thwe Aung1, Atsuhiko Terada1 (1. JAEA)
Keywords:
Oxide powder,Water suspension,Water radiolysis,Hydrogen generation,Hydrogen retention
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. When the powdered debris is suspended in water, the water is decomposed by ionizing radiation from the radioactive materials in the debris, forming H2. The generation (observed) amount of H2 released from the suspension is expected to depend on the height of the suspension sample, as H2 bubbles are retained in the suspension (H2 pools). Clarifying this dependence is important for realizing H2 safety management such as H2 generation and H2 bubble retention during the containing and storage of powdered debris. In this study, oxides such as ceria and zirconia were used as debris simulants, and the sample height dependence of H2 generation from the water suspensions of oxide powders was measured through γ-ray irradiation experiments, and this was compared with the liquid depth effect on water radiolysis.