UPDATE: Tsuruga nuclear plant may have to be decommissioned as active fault found

[Art_from_Ark]

11. The Tsuruga unit was completed in 1966

That is, more than 45 years ago when much, much less was known about geological faults in the area. Although the city of Fukui up the Sea of Japan coast from Tsuruga had had a major earthquake in 1948, it was thought at the time that Tsuruga was in a more stable geological area and that the seismic design of the unit could withstand a similar earthquake. Also, the Tsuruga unit is in a relatively sparsely populated area, and Fukui Prefecture (where Tsuruga is located) welcomed the reactor at the time because it would bring lots of jobs and money to what had been a fairly poor area of the country.