according to Flight International http://www.flightglobal.com/articles/2010/02/15/338369/uk-could-use-plutonium-in-space-nuclear-power-demonstration.html
http://www.spaceflightnow.com/news/n1007/09rtg/
ESA is getting serious about starting their own RTG production, with one official saying:
Since we were talking nuclear isotopes in this thread, I have a question regarding this:
http://www.nytimes.com/2012/02/07/science/ge-ends-bid-to-create-a-supply-of-technetium-99m.html
... they are basically kicking around ways to expose Mb-99 to a neutron source to create Tc-99.
Is this perhaps similar to how Pu-238 is created? By exposing Np-238 to a neutron source? Could strategic supplies of both isotopes be created in the same facility?
Plutonium 238 can be produced in usable purity in two different ways. Separate out neptunium 237 from spent reactor fuel. Place this in a reactor to expose it to neutrons. The Np-237 atoms that capture a neutron will either fission or form Np-238. Np-238 will decay to Pu-238 in short order. There will always be a little bit of Pu-239 contamination from double neutron capture. This is the standard process.
You can also make it from exposing americium 241 to neutrons, producing Am-242, which beta decays to Curium 242, then alpha decays to Pu-238. This method requires a high flux of neutrons.
Thanks for the answer.
Could I suggest however that we leave this discussion here.
The thread, which was started two years ago, was about an ESA study.
The merits and possibilities of Pu238 production for RTGs has been discussed and debated elsewhere.
On past experience, the issue can run too close to breaching UMSF Rule 1.2 on contentious issues. Thanks.
Astro0 (UMSF Admin Team)
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