Offhand Wolseong in Korea brought thier two new reactors online in five and seven years, and have a nationwide average of six years. Qinshan in China brought two new Candean reactors online in four and five years, with a nationwide average of five years aswell.
As the other commenter mentioned Japan has systemicly built reactors in four years, though Fukushima 2 does well to demonstrate the danger or just running old American designs forever given how much better the modern reactors at the plant did than the older ones.
Offhand Wolseong in Korea brought thier two new reactors online in five and seven years, and have a nationwide average of six years. Qinshan in China brought two new Candean reactors online in four and five years, with a nationwide average of five years aswell.
As the other commenter mentioned Japan has systemicly built reactors in four years, though Fukushima 2 does well to demonstrate the danger or just running old American designs forever given how much better the modern reactors at the plant did than the older ones.
https://inis.iaea.org/collection/NCLCollectionStore/_Public/42/105/42105221.pdf