JRR-3冷中性子源装置における高性能減速材容器の開発

Developments of high-performance moderator vessel for JRR-3 cold neutron source

新居 昌至 ; 田村 格良  ; 羽沢 知也

Arai, Masaji; Tamura, Itaru; Hazawa, Tomoya

研究炉加速器管理部では、より多くの冷中性子をユーザーに供給するため、既存のCNS減速材容器の約2倍の冷中性子束を取り出すことのできる高性能減速材容器の開発を第2期中期計画で実施している。本報告書では、高性能減速材容器の基本設計仕様に基づき、設計強度評価、試験体を用いた強度試験、液体水素の流動解析、異材接合部の強度評価を行った。評価の結果、開発した高性能減速材容器がJRR-3のCNS減速材容器として適用可能であることを確認した。

In the Department of Research Reactor and Tandem Accelerator, developments of high-performance CNS moderator vessel that can produce cold neutron intensity about two times higher compared to the existing vessel have been performed in the second medium term plans. We compiled this report about the technological development to solve several problems with the design and manufacture of new vessel. In the present study, design strength evaluation, mockup test, simulation for thermo-fluid dynamics of the liquid hydrogen and strength evaluation of the different-material-bonding were studied. By these evaluation results, we verified that the developed new vessel can be applied to CNS moderator vessel of JRR-3.