Lessons-learned from ongoing decommissioning project of Fugen NPS

Tezuka, Masashi  ; Yanagihara, Satoshi*; Iguchi, Yukihiro  ; Koda, Yuya ; Kato, Yasuaki

Fugen was shut down after ca 25 years operation, and started decommissioning activity from 2008, and dismantlement of the core is from about 2022. In the reactor core, the laser cutting method was selected for dismantling the core area and shielding area, and diamond wire saw was also selected for dismantling the shielding area. Laser cutting system in air will be organized and demonstration examinations to some equipment except core area will be carried out. Moreover, laser cutting system underwater should be also organized. This indicates an example of lessons-learned for the process of how the decommissioning program is planned and R&D for suitable technologies are implemented and they are applied to the final dismantlement process.