1998 Fiscal Year Final Research Report Summary
STUDY ON A NEW ARRANGEMENT FOR THE AIR CLEANUP SYSTEM TO RECOVER TRITIUM
| Project/Area Number |
08558055
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
NISHIKAWA Masabumi kyushu University, Interdisciplinary Graduate School of Engineering and Science, Professor, 大学院・総合理工学研究科, 教授 (90026229)
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| Co-Investigator(Kenkyū-buntansha) |
HONDA Takurou Hitachi Co., Energy Research Section, Research Engineer, エネルギー第一研究部, 研究員
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| Project Period (FY) |
1996 – 1998
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| Keywords | new arrangement air cleanup system / adsorption bed / catalyst bed with precious metal / isotope exchange reaction |
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| Research Abstract |
At present, the standard arrangement of the air cleanup system responsible for emergency tritium recovery from room air is a catalytic oxidation bed with a heater followed by an absorption bed with a cooler. One disadvantage of this arrangement is that trouble with the heater or the cooler could result in a loss of capacity to recover tritium. Another disadvantage of the catalyst-adsorption bed arrangement is that tritiated water must be recovered with a high decontamination factor after dilution with a large amount of water vapor in the working atmosphere.
The performance of a new arrangement for the air cleanup system, which consists of a precious metal catalyst bed preceded by an adsorption bed without equipment , is proposed in this research project. According to calculations, most of the tritium released to the room air is recovered in the catalyst bed through oxidation, adsorption, and isotope exchange reaction when the new arrangement is applied. The adsorption bed placed before the catalyst bed dehumidifies the process gas to such a degree that the oxidation reaction of tritium in the catalyst bed is not hindered by water vapor in room.
The new arrangement could recover tritium from the room air with the expected performance in the experiment using an small scale model reactor room.
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