Yes, Gronau is the notable exception. Though note the involvement of WW2 winners France and UK (the owner is still a UK company) and the capacity that was wildy below demand for Western German plants.

It also isn't like Germany didn't want nuclear proliferation. Public demand to be allowed to produce nukes already started with Konrad Adenauer in the 1950's, and parts of the conservatives still bring up the topic from time to time (e.g. Rupert Scholz in 2007).