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With CO2 emitting option is priced out or banned, direct hydrogen production using high temperature sulfur–iodine cycle without H2 electrolysers could be economic option. The heat could be supplied from high temperature nuclear reactor.
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How to make hydrogen production cheaper and easier: include an atomic reactor component.

Huh?

I’d be interested in hearing about some scenario where this actually costs less, given the cost of building anything nuclear in 2026.

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I agree, the experience building nuclear reactors is mixed bag. Some builds failed, like Flamanville 3, Hinkley Point C, Vogtle 3. Some builds succeeded: Barakah nuclear power plant, Fuqing 5,6. It really depends on maturity of supply line and political support.
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