Development of thermal treatment of radioactive waste by uranium oxide catalyst and absorbent for byproducts

Research Project

Project/Area Number	20686063
Research Category	Grant-in-Aid for Young Scientists (A)
Allocation Type	Single-year Grants
Research Field	Nuclear engineering
Research Institution	Nagoya University
Principal Investigator	SAWADA Kayo Nagoya University, エコトピア科学研究所, 准教授 (90372531)
Project Period (FY)	2008 – 2010
Project Status	Completed (Fiscal Year 2010)
Budget Amount *help	¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000) Fiscal Year 2010: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000) Fiscal Year 2009: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000) Fiscal Year 2008: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Keywords	酸化ウラン / 触媒 / 吸着剤 / 放射性廃棄物 / 熱処理法
Research Abstract	Catalytic decomposition employing uranium oxide, U_3O_8, powder was carried out for chlorobenzene as one of the toxic gases generated from the thermal treatment of low level radioactive waste. The activation energy of the catalytic decomposition decreased to approximately half of that of the thermal decomposition. Coexistence of nitrogen dioxide with chlorobenzene increased the decomposition rate of chlorobenzene. Addition of calcium hydroxide as an absorbent also increased the conversion. The conversion obtained with the simulated catalyst regenerated with oxalic acid was almost same to that obtained with the mixed powder of uranium oxide and calcium hydroxide at 225℃.

Report

(4 results)