ELi5: Why experimental fusion/fission reactors are not built smaller first?

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Wouldn’t it be cheaper and more feasible to build and try experimental reactors 10x smaller for research and development purposes and _then_ built the proper size when they are proven to be efficient?

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Anonymous 0 Comments

The problem is that the process doesn’t scale down easily. You need a sufficient amount of fuel and equipment that produces strong enough magnetic fields to get that fuel into the right place for fusion to happen. Basically… It’s easier to build big in this case than to build small.

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