「常陽」の高度化計画(MK-III計画)

Joyo Upgrading Program(MK-III Program)

吉田 昌宏 ; 吉田 昌宏 ; 青山 卓史 ; 前田 幸基

not registered; Yoshida, Akihiro; Aoyama, Takafumi; Maeda, Yukimoto

高速実験炉「常陽」は,FBR開発に資するため,昭和62年に照射性能の向上,新技術の実証等を内容とする高度化計画(MK.III計画)の検討を開始した。照射性能向上に関しては,幅広いパラメータサーベイを行い,炉心の高中性子束化,冷却系の改造,照射運転時間の増大及び照射技術の高度化を柱とする炉心・プラント改造仕様を定めた。これに基づき,平成7年に原子炉設置変更許可を取得し,平成15年に改造工事を終了させ,平成16年度から照射試験のための運転を開始する計画である。新技術の実証では,当時の実証炉計画に合わせ新型炉停止機構,FBR実用化段階を目指した二重管蒸気発生器の設置・実証試験計画の検討等を行った。

A Joyo upgrade program named MK-III program was started to develop future FBR in 1987. The main objectives of this program are increasing the capability as an irradiation test bed core and developing innovative FBR technologies.In order to modify the irradiation capability, the core and plant modification program which consists of increasing the neutron flux density of the core, modification of the cooling system, modification of the plant availability factor and upgrading irradiation technologies were decided based on the result s of survey calculations. The licensing work completed in 1995, and all the modification work completed in 2003. JOYO will start rated power operation along with several irradiation tests in 2004. Also the installation and demonstration program of innovative technologies such as Self-actuated shut down system for demonstration FBR and double-walled steam generator for future FBR were investigated.