A Promising Gas-Cooled Fast Reactor Concept and its R&D Plan

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此村 守; 三枝 利家; 水野 朋保; 大久保 良幸*

Konomura, Mamoru; SAIGUSA, Toshiie; Mizuno, Tomoyasu; OHKUBO, Yoshiyuki*

実用化戦略調査研究では、ガス冷却高速炉の有望な候補概念として、ピン型燃料炭酸ガス炉、ピン型燃料ヘリウムガス炉、被覆粒子燃料ヘリウムガス炉の3概念より経済性・安全性の観点から被覆粒子燃料ヘリウムガス炉を選定した。(フェーズ1)この被覆粒子燃料ヘリウムガス炉の燃料集合体概念については被覆粒子層直接冷却方式横方向流冷却概念の他に燃料保持性に優れる六角ブロック縦方向流冷却概念についても検討を行った。また、プラント概念実現性を左右する重要な課題である受動的炉停止機構、ガスタービン等について開発計画を策定した。

In Feasibility Studies on Commercialized Fast Reactor (FR) Systems, examining about the subject of three gas cooled FR concepts, (1) carbon dioxide cooled FR using pin type fuel, (2) helium cooled FR using pin type fuel, (3) helium cooled FR using coated particle fuel, a promising concept has been selected from three concepts. From a viewpoint of economic competitiveness and ensuring safety, etc, "helium cooled FR using coated particle fuel" has been selected as a promising concept of gas cooled FR. About fuel assembly concept of helium cooled FR using coated particle fuel, block type vertical flow cooling concept with 2nd boundaries was also examined, other than horizontal flow cooling concept with directly cooling system. About selected helium cooled FR using coated particle fuel, it drew up R&D plan about the most important R&D items influencing on the feasibility of the design concept.