There are micro/nano nuclear designs meant to fit in a truck trailer. They are under 1mw power, and not meant to be affordable for those who need more power than that. They are not space efficient to power ships. They may never be made, and just investor scams.
As for shipping, civilian use would be nightmare. Virginia class nuclear subs cost $2.7B. 5x more 2.2B more than best diesel submarines and have operational costs that are 4x higher than diesel subs. Wind power is path to decarbonizing shipping. That chinese airborne blimp windmill posted recently would work.
There are micro/nano nuclear designs meant to fit in a truck trailer. They are under 1mw power, and not meant to be affordable for those who need more power than that. They are not space efficient to power ships. They may never be made, and just investor scams.
As for shipping, civilian use would be nightmare. Virginia class nuclear subs cost $2.7B. 5x more 2.2B more than best diesel submarines and have operational costs that are 4x higher than diesel subs. Wind power is path to decarbonizing shipping. That chinese airborne blimp windmill posted recently would work.