The operators of two nuclear power plants in Fukui Prefecture said Tuesday they will scrap three old reactors, the first such move since a 2013 government regulation spelled out the steps required to keep reactors running beyond their planned 40-year service life.

Kansai Electric Power Co. decided at a board meeting to decommission the No. 1 and No. 2 reactors at its Mihama facility.

Japan Atomic Power Co. meanwhile decided to scrap the No. 1 reactor at its Tsuruga plant.