209 核破砕中性子源用冷減速材容器の構造強度評価

概要

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In the JSNS facility, a liquid-hydrogen moderator is one of key components to keep high neutronic performance, which has to be designed so as to suppress neutron absorption in a vessel wall. Rational thickness of the moderator vessels made of aluminum alloy A6061-T6 was estimated under the design pressure of 2 MPa along the High Pressure Gas Safety Law. The integrity of the moderator vessel, especially, a neutron extraction surface, would be assured with 5mm-thick wall for a decoupled moderator (flat type vessel) and 4mm-thick for a coupled moderator (cylindrical type vessel). Necessary thickness of the welding line were also decided since the moderator vessel has to be fabricated by welding upper and bottom parts which are formed by a precise shaving processing.
社団法人日本機械学会の論文
2003-09-19