Feasibility study on tritium recoil barrier for neutron reflectors of research and test reactors
Kenzhina I. Ishitsuka E. Ho H.Q. Sakamoto N. Okumura K. Takemoto N. Chikhray Y.
March 2021Elsevier Ltd
Fusion Engineering and Design
2021#164
Tritium release into the primary coolant of the JMTR and the JRR-3 M had been studied, and it is found that tritium recoil release from the chain reaction of beryllium neutron reflectors is dominant. To prevent the tritium recoil release, Al, Ti, V, Ni and Zr are selected as the candidate tritium recoil barrier materials in this feasibility study. It is clear that 20∼40 μm thickness is required depending on the material to reduce by 3 orders, and that an impact on the effective multiplication factor is about 0.2 % at most. Total evaluation including the activities, fabrication and usage experiences, suggests the selection of Al as the first candidate may have the least development risk as the tritium recoil barrier.
MCNP6 , Neutron reflectors , ORIGEN2 , PHITS , Research and test reactors , Tritium recoil barrier
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Al-Farabi Kazakh National University, 71 al-Farabi Ave, Almaty, 050040, Kazakhstan
Oarai Research and Development Institute, Sector of Fast Reactor and Advanced Reactor Research and Development, Japan Atomic Energy Agency, Higashi ibaraki-gun, Ibaraki-ken, 311-1393, Japan
Institute of Nuclear Physics, 1 Ibragimova str., Almaty, 050032, Kazakhstan
NGK Insulators, Ltd., 2-56, Suda-cho, Mizuho, 467-8530, Nagoya, Japan
Collaborative Laboratories for Advanced Decommissioning Science, Sector of Fukushima Research and Development, Japan Atomic Energy Agency, Futaba-gun, Fukushima, 979-1151, Japan
Al-Farabi Kazakh National University
Oarai Research and Development Institute
Institute of Nuclear Physics
NGK Insulators
Collaborative Laboratories for Advanced Decommissioning Science
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