There's a lot of that in Cumbria... about 120 Tonnes. | Hacker News

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		sgt101 on Oct 25, 2017 \| parent \| context \| favorite \| on: Thruster for Mars mission breaks records There's a lot of that in Cumbria... about 120 Tonnes.

philipkglass on Oct 25, 2017 [–]

Spent nuclear fuel from reactors doesn't have usable quantities of the right plutonium isotope. RTGs use the uncommon Pu-238. Plutonium in spent nuclear fuel is mostly Pu-239, 240, 241, and 242.

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