Solarpunk technology

Nuclear marine propulsion is mainly used in naval warships, and it looks like there are some serious issues for their use in another context:

Nuclear-powered merchant ships’ collisions, severe machinery damage, fires, explosions, or nuclear leakage may cause serious harm to the marine environment. Current research on nuclear propulsion for merchant ships has shed light on the technical, economic, and sociopolitical challenges to widespread adoption. However, despite the valuable multidisciplinary insights, there remains a deficit in thorough and in-depth research from an international law perspective. [source]

See also: Why nuclear-powered commercial ships are a bad idea | Bulletin of the Atomic Scientists