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by dragonwriter 2967 days ago
> Maybe nuclear power for commercial ships?

Four have been built (by the US, Germany, Japan, and Russia), starting in the 1950s (one per decade from the 1950s to the 1980s), but it's never really caught on. The most recent built was refitted and returned to service in 2016, after having been decommissioned and awaiting disposal for nearly a decade, the rest have been scrapped.