Switzerland. Canton Aargau. View on Full-Reuenthal and Leibstadt Nuclear Power Plant. The Leibstadt Nuclear Power Plant (German: Kernkraftwerk Leibstadt, KKL) is located near Leibstadt, canton of Aargau, Switzerland, on the Rhine River and close to the border to Germany. Commissioned in 1984, it is the country's youngest and most powerful of all five operating reactors. 5.02.2019 © 2019 Didier Ruef