Decommissioning of the five aged nuclear reactors has been decided. It will take a long time of 30 years or so for the decommissioning work, but it might as well be better than the case of Fukushima Dai-ichi Nuclear Power Plant of Tokyo Electric Power which caused the accident. As for the gas-related business, we can expect purging, cutting and inspecting gases for decontamination or dismantling or removal of building structures.

The five reactors to be decommissioned at this time include Kansai Electric Power Mihama NPP Unit 1 & 2, Japan Atomic Power Tsuruga Unit 1, Chugoku Electric Shimane Unit 1 and Kyushu Electric Genkai Unit 1, all of which are over 40 years old since establishment.
　
The decommissioning process consists of ①shutdown of operation, ②discharging of used nuclear fuel, ③systematic decommissioning (to decommission the radioactive substances remaining in nuclear furnace facilities and pipes), ④safety storage (waiting for safe management of facilities and depression of radiation dose), ⑤dismantling and removal of equipment in the building, ⑥dismantling and removal of building and ⑦disposition/clear-out of wastes. The cutting process using gases is carried out mainly in ⑤ applied to pipeline, heat exchanger, pressure vessel and nuclear reactor. However, it seems that actual works will have to start in sometime around 10 years because the radiation dose must be reduced considerably first of all.
　
From the technological viewpoint, the International Research Institute for Nuclear Decommissioning (IRID) established in August 2013 aiming for trouble-shooting of Fukushima Dai-ichi Reactor has developed remote-controlled robots or various research equipment, which are expected to be of help to the decommissioning practices at this time.