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References in periodicals archive ?
Since mMST shows high affinity for neptunium, which is present as neptunyl species, Np[O.sub.2.sup.+], the low affinity of mMST for uranium cannot be attributed solely to the uranium being present as an uranyl species.
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.
These long-lived radionuclides , called minor actinides (elements like americium, curium, neptunium), have to be separated from the spent fuel to be placed in a specific reactor for transmutation.
You're obviously fresh back from drilling for Neptunium on one of the moons of Uranus.
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.