@article{oai:toyama.repo.nii.ac.jp:00006315, author = {松山, 政夫 and 三宅, 均 and 芦田, 完 and 市村, 憲司 and 渡辺, 国昭 and 竹内, 豊三郎 and 金, 信次 and 井上, 照明}, journal = {富山大学トリチウム科学センター研究報告 = Annual Report of Tritium Research Center, Toyama University}, month = {}, note = {application/pdf, An emergency tritium removing system, using a precious metal/alumina catalyst, was designed and constructed in order to decontaminate tritium leaked accidentally into laboratory rooms. The performance of thee system was examined using a balloon for helium recovery or an aluminum vessel as a substitute of a laboratory room. Tritium gas containing about 10% tritiated methane (CH3T) as an impurity was introduced into the experimental room and then removed with an air flow rate of 72 m3/h. Tritium gas (T2) was removed satisfactorily, i.e. the reaction probability was unity, due to a Pd/Al2O3 catalyst (Nippon Jun Suiso Co. Ltd) at 200℃, while the tritiated methane could not be removed with a sufficient amount of efficiency: its reaction probability was below unity. It was found that the reaction probability of the tritiated methane became unity above 300℃ for this catalyst. On the basis of these results, it is estimated that the accidental leakage of tritium of 5Ci (which is the maximum permissible amount used in a day in this laboratory) into a laboratory room can be removed within an 18h period., Article}, pages = {21--26}, title = {トリチウム除去装置の性能試験(II)}, volume = {2}, year = {1982} }