This is just wrong. The decision to phase out eventually was made by chancellor Kohl in the '80s because of the epical financial failure of the THTR-300 and the corruption scandals around the NPP in Mülheim-Kärlich. When the Greens came into power as a junior partner in the late '90s they created a plan on when to exit nuclear and how to replace it (and fossil) with renewables. Then Merkel came into power and slashed the entire renewable stuff, investing into more coal first and then into gas.

All that Fukushima did was triggering the so called "Atom-Moratorium" which was a shutdown of all NPPs for general inspections, with the results being so devastating several plants weren't allowed to reboot.