Operation and Upgrade experiences in the Experimental Fast Reactor JOYO

None

吉田 昌宏 ; 前田 幸基; 鈴木 惣十; 原 広

not registered; Maeda, Yukimoto; Suzuki, Soju; Hara, Hiroshi

「常陽」では、MK-I、MK-II炉心の運転を通じ、種々の照射試験を行うとともに、運転保守、炉心燃料管理などに関する知見を蓄積し、現在さらに「常陽」の照射性能を向上させるMK-III計画を進めている。MK-III炉心では、FBRサイクル実用化研究のための照射試験などを実施していく計画である。

The experimental fast reactor JOYO attained its initial criticality in 1977 with the MK-I breeder core. In 1982, JOYO was modified to the MK-II irradiation core and finished its operation in 2000. Throughout the successful operation of MK-I and MK-II core, the net operation time has exceeded 60,000 hours, and experience on the operation, maintenance and core/fuel management of a fast reactor plant has been accumulated. Furthermore the MK-III modification program is underway to improve the irradiation capability of JOYO. When the MK-III core is started, it will support irradiation tests in feasibility studies for fast reactor and related fuel cycle research and development in Japan.