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References in periodicals archive ?
Since mMST shows high affinity for neptunium, which is present as neptunyl species, Np[O.
Christiansen's team conducted experiments demonstrating green rust's ability to immobilize neptunium at the Swedish Nuclear Fuel and Waste Management's pilot research facility at Okskarshamn on Sweden's east coast and at the Karlsruhe Institute of Technology in Germany.
Scientists have conducted experiments since 2002 utilizing used nuclear fuel and have succeeded in collectively retrieving uranium, plutonium and neptunium.
Technologies and developments that utilize these tools inclu de: continuous dissolution of naval fuels with on-line monitoring and control of fluoride complexation; dissolution chemistry for sand-slag-crucible plutonium residues, for Russian Sapphire U-Be fuel, and for irradiated neptunium oxide in aluminum targets for Pu-238 production; extraction of actinides in the presence of zirconium in acidic solutions; and development of a non-mercury catalyst, fluoboric acid, for dissolving aluminum nuclear fuels in nitric acid.
The report noted that some workers were required to strike large cloth-filter bags with metal rods to remove heavy concentrations of uranium laced with neptunium and plutonium.
Following another stage of "radioactive decay," neptunium becomes plutonium-239, which can replenish the fuel core.
The nuclei of the latter then become unstable and decay into plutonium 239 or neptunium 239.
The Integral Fast Reactor's fuel cycle is the first one capable of taking actinides such as neptunium, americium, and plutonium and automatically putting them back--integrating them quickly and automatically--into the nuclear fuel stream.