[1C01-05] Treatment of Radiolysis Gas 1

[1C01] R&D on reduction technologies of hydrogen generated in long-term waste storage containers

(7) Design of monolithic catalyst for passive autocatalytic recombiner and measurement of natural convection in a container

*Tomoaki Kita¹, Hitomi Ono¹, Keisuke Takenaka¹, Hirohisa Tanaka¹, Masashi Taniguchi², Daiju Matsumura³, Yasuo Nishihata³, Ryutaro Hino³, Reinecke Arndt Ernst⁴, Kazuyuki Takase⁵ (1. Kwansei Gakuin University, 2. Daihatsu Motor Co.,Ltd., 3. Japan Atomic Energy Agency, 4. Forschungszentrum Jülich GmbH, 5. Nagaoka University of Technology)

Keywords:Catalyst, Monolithic catalyst, Hydrogen, PAR, Cell density, Natural convection velocity

The objective of the research is to clarify the design parameters of PAR for long-term-storage containers of radioactive-waste by hydrogen-oxygen-recombination experiments. The effects of the geometry (cell-density, thickness) of the monolithic intelligent automotive catalyst and chimney on the hydrogen throughput and the natural convection were measured by using the REKO-4 reactor (5.3 m³) in JÜLICH.