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Fusion Science and Technology
Latest News
NRC updating GEIS rule for new nuclear technology
The Nuclear Regulatory Agency is issuing a proposed generic environmental impact statement (GEIS) for use in reviewing applications for new nuclear reactors.
In an April 17 memo, NRC secretary Carrie Safford wrote that the commission approved NRC staff’s recommendation to publish in the Federal Register a proposed rule amending 10 CFR Part 51, “Environmental Protection Regulations for Domestic Licensing and Related Regulatory Functions.”
Yasunori Iwai, Hitoshi Kubo, Yusuke Ohshima, Hiroshi Noguchi, Yuki Edao, Junichi Taniuchi
Fusion Science and Technology | Volume 68 | Number 3 | October 2015 | Pages 596-600
Technical Paper | Proceedings of TOFE-2014 | doi.org/10.13182/FST14-921
Articles are hosted by Taylor and Francis Online.
We have developed two types of hydrophobic platinum honeycomb catalyst to be used for tritium oxidation reactors. One is the hydrophobic platinum catalyst on a metal honeycomb. The other is the hydrophobic platinum catalyst on a ceramic honeycomb made of silicon carbide. The activity of these catalysts was evaluated with tritium. The effects of hydrogen concentration (0.02 to 1000 ppm) and water concentration (100 or 22000 ppm) in the gaseous feed on the activity were investigated. The fine platinum particles around a few nanometers significantly improve the catalytic activity for the oxidation tritium at a very small concentration. The hydrogen concentration in the gaseous feed slightly affects the overall reaction rate constant for hydrogen oxidation. Due to the competitive adsorption of hydrogen and water molecules on platinum surface, the overall reaction rate constant has the bottom value at the hydrogen concentration of 100 ppm with the dry feed gas. We have experimentally confirmed the activity of these honeycomb catalysts is as good as that of granular hydrophobic catalyst. The results support the hydrophobic honeycomb catalysts can be used for tritium oxidation reactors.
