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PUREX raffinate: Difference between revisions

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#REDIRECT [[PUREX#PUREX raffinate]]
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The term '''PUREX [[raffinate]]''' is a better term for the mixture of metals in [[nitric acid]] which are left behind when the [[uranium]] and [[plutonium]] have been removed by the [[PUREX]] process from a [[nuclear fuel]] dissolution liquor. This mixture is often known as high level [[nuclear waste]].


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Two PUREX raffinates exist. The most highly active [[raffinate]] from the first cycle is the one which is most commonly known as PUREX raffinate. The other is from the medium-active cycle in which the uranium and plutonium are refined by a second [[solvent extraction|extraction]] with [[tributyl phosphate]].
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[[Image:Purexraffinatecomp.png|750px|center]]
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Deep blue is the bulk ions, light blue is the [[fission products]] (group I is Rb/Cs) (group II is Sr/Ba) (group III is Y and the [[lanthanides]]), orange is the [[corrosion]] products (from stainless steel pipework), green are the major actinides, violet are the [[minor actinides]] and magenta is the [[neutron poison]])

Currently PUREX raffinate is stored in [[stainless steel]] tanks before being converted into [[glass]]. The first cycle PUREX raffinate is very [[radioactive]]. It has almost all of the [[fission products]], [[corrosion]] products such as [[iron]]/[[nickel]], traces of uranium, plutonium and the [[minor actinides]].

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[[Category:Chemical engineering]]

Latest revision as of 16:12, 10 June 2017