[1D05-06] Boiling and Drying of High-level Liquid Waste

[1D06] Study on applicability of zeolite for mitigation of RuO₄ release

(1) Composition change of coexisitng gas during volatile ruthenium removal by contact with zeolite

*Yuma Sekiguchi¹, Tetsuya Kato¹, Tsuyoshi Usami¹ (1. CRIEPI)

Keywords:HLLW, evaporation to dryness, Ruthenium, Zeolite

The authors conducted the research on the performance of zeolite on the volatile ruthenium removal in the evaporation to dryness accident. The authors analyzed the composition change of coexisting gas with RuO₄ from heating the solution containing ruthenium nitrosyl nitrate in this study. As the result, RuO₄, HNO₃ and NO₂ in the evolved gas by contact with zeolite, and it considered that the removal of HNO₃ influence the RuO₄ decrease.