Well, small reactors have never been cost effective. In the 1950s we built lots of small reactors and they were terribly cost ineffective. We scaled up specific

Well, small reactors have never been cost effective. In the 1950s we built lots of small reactors and they were terribly cost ineffective. We scaled up specifically to make them cost effective. Today pro-small nuclear people are thinking economies of mass production can beat out economies of scale. Having read a lot of the history on this topic I don't think we quite know how to make this happen yet. What we know works is economies of scale + economies of mass production, like when France decarbonized their entire electric grid by standardizing on large PWRs and building 58 of them in 15 years.