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A comment on Rolls-Royce Touts Nuclear Reactors as Key to Clean Jet Fuel. Parent comment

Re:Rolls-Royce Touts Nuclear Reactors as Key to Clean Jet Fuel by jabl on Saturday December 07, 2019 @04:30AM (#21729319)
I don't think anybody sane is suggesting running civilian ships on HEU.
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Re:Rolls-Royce Touts Nuclear Reactors as Key to Clean Jet Fuel by greglindahl on Saturday December 07, 2019 @05:08AM (#21729441)
Check out current ship and sub reactors, the overwhelming majority run on HEU.

I have never seen anyone talking about ship reactors on HN mention not using HEU.

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Re:Rolls-Royce Touts Nuclear Reactors as Key to Clean Jet Fuel by jabl on Saturday December 07, 2019 @07:23AM (#21729902)
> Check out current ship and sub reactors, the overwhelming majority run on HEU.

The overwhelming majority are military, who are not as constrained by non-proliferation concerns as civilian users. So this doesn't really prove anything.

As for whether it's technically possible to have naval reactors using LEU, yes it is, for instance French submarines run on 7% enriched fuel.

> I have never seen anyone talking about ship reactors on HN mention not using HEU.

When talking about a hypothetical large-scale use of civilian nuclear powered ships, I think it's a given.

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