'What Drives This Madness On Small Modular Nuclear Reactors?'

Slashdot reader XXongo writes: Nuclear power plants have historically been built at gigawatt scale. Recently, however, there has been a new dawn seeing multiple projects to build Small Modular Reactors ('SMRs'), both funded by billionaires and by the U.S. Department of Energy.

Recently one of the players farthest ahead in the development, NuScale Power, canceled their headline project, but many other projects continue. In a lengthy analysis, Michael Barnard thinks that's crazy, and attributes the drive toward small reactors to 'a tangled web that includes Bill Gates, Silicon Valley, desperate coal towns, desperate nuclear towns, the inability of the USA to build big infrastructure, the U.S. Department of Energy's budget, magical thinking and more.' Due to thermal inefficiencies, small reactors are more expensive per unit of power generated, he points out, and the SMR projects ignore most of the field's history's lessons about both the scale of reactors for commercial success and the conditions needed for success.

They are relying on Wright's Law, that each doubling of the number of manufactured items in production manufacturing would bring cost per item down by 20% to 27%, but Barnard points out that the number of reactors needed to achieve enough economy of scale in production to make the reactors make economic sense is unrealistically optimistic. He concludes that only government programs can meet the conditions for successful deployment of nuclear power.

At one point Barnard characters SMRs as 'a bunch of lab technologies that have been around for decades that depend on uranium from Russia, that don't have the physical characteristics for cheap nuclear generation and don't have the conditions for success for nuclear generation will be the saviours of the nuclear industry and a key wedge in fighting climate change...

'I like nuclear generation. I know it's safe enough. I'm not concerned about radiation... I just know that it doesn't have the conditions for success to be built and scaled economically in the 21st Century, and wind, water, solar, transmission and storage do.'

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