Yes, I know. I saw a lot of book about these. Wandering earth is science fiction. So something is not so scientific. But I think maybe we are not must to fusion super heavy element like U-238(haha). Maybe we can use lithium, oxygen, magnesium or others. My idea is mainly about a fusion reactor use more common materials.
Now I have a new idea, make a fusion reactor like production machines, it’s not primarily for capacity but for making heavy elements.
Perhaps light element fission is also possible. Haha, but I think antimatter is better.
for dnk’s (sorry, I can’t reply you before others reply me)
I saw this image some years ago. But stone is not all made of Uranium. I think maybe we can use something a bit heavier, the more common ones. Less capacity is not a problem, if one day you can extract something have a little productive from the rock, you can win by volume. After completing most of the GT processes, I think it can be used as some final production machines. You know, even though thermal power is not very efficient, China still generates billions of kilowatt-hours of electricity from coal in tens of thousands of thermal power plants.