The Unstable Geniusof Rosatom, Andrei Petrov, today floated this beauty AKA the "Russian Hindenburg":
https://www.world-nuclear-news.org/Articles/Russia-expects-operating-licence-for-floating-plan
The U.S. SMR, the brainchild of Bill Gates, meanwhile, remains in the lab at MIT:
https://www.greentechmedia.com/articles/read/confidence-in-russia-floating-nuclear-timeline
https://cna.ca/news/nuclear-at-sea-floating-reactors/