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plutonium

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Journal Article
Published: 01 August 2017
Reviews in Mineralogy and Geochemistry (2017) 83 (1): 329–363.
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Journal Article
Journal: Elements
Published: 01 August 2016
Elements (2016) 12 (4): 233–237.
... into three broad categories: 1) highly radioactive, heat-producing waste, mainly spent nuclear fuel and high-level waste from reprocessing of spent nuclear fuel; 2) less radioactive waste materials contaminated by long-lived nuclides, such as plutonium, which is generally termed “long-lived intermediate...
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Journal Article
Journal: Elements
Published: 01 August 2016
Elements (2016) 12 (4): 227–228.
Journal Article
Published: 01 August 2016
Mineralogical Magazine (2016) 80 (5): 765–780.
... 233 U was separated from streams of a PUREX process 1 1 Plutonium Uranium Redox EXtraction, a process for the reprocessing of spent nuclear fuel to separate uranium and plutonium from the fission products and from one another. and purified by using a cation exchange procedure ( Chitnis et al...
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Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 833–847.
.... Such observations led to monazite-type structures being proposed as a potential host matrix for sequestering long-lived radionuclides produced during the nuclear fuel cycle and/or plutonium and americium from dismantled nuclear weapons. Monazite has two main advantages as a matrix for the containment of radioactive...
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Journal Article
Published: 01 December 2012
Mineralogical Magazine (2012) 76 (8): 3373–3380.
...S. Vines; R. Beard Abstract In the UK, radioactive wastes currently planned for disposal in a geological disposal facility (GDF) are intermediate-level waste, some low-level waste and high-level waste. Disposal of other materials, including spent fuel, separated uranium and separated plutonium...
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Journal Article
Published: 01 December 2012
Mineralogical Magazine (2012) 76 (8): 2911–2918.
...G. Deissmann; S. Neumeier; G. Modolo; D. Bosbach Abstract Separated stocks of UK civil plutonium are currently held as a zero value asset in storage, as there is no final decision about whether they should be treated as a resource for future use as nuclear fuel or as waste. Irrespective of future...
Journal Article
Published: 01 December 2012
Mineralogical Magazine (2012) 76 (8): 2949–2956.
... Waste Management Directorate's research to develop package fissile material limits (in the form of screening levels) for four different categories of ILW, defined according to uranium or plutonium composition: (1) irradiated natural and slightly enriched uranium (uranium containing up to 1.9 wt.% 235 U...
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Journal Article
Published: 01 November 2012
Vadose Zone Journal (2012) 11 (4): vzj2011.0142.
... Laboratories (2007b) . For purposes of comparison, 99 Tc is presented as a nonsorbing radionuclide ( K d = 0 for all rock types); 237 Np is a moderately sorbing radionuclide with K d uncertainty distributions ranging from about 0.5 to 6 mL g −1 ; and isotopes of plutonium are considered strongly sorbing...
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Journal Article
Published: 01 August 2012
Vadose Zone Journal (2012) 11 (3): vzj2011.0131.
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Journal Article
Journal: Elements
Published: 01 June 2012
Elements (2012) 8 (3): 213–219.
...Bernd Grambow; Christophe Poinssot Abstract Used nuclear fuel is a redox-sensitive semiconductor consisting of uranium dioxide containing a few percent of fission products and up to about one percent transuranium elements, mainly plutonium. The rapid increase in temperature in the cores...
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Journal Article
Journal: Elements
Published: 01 June 2012
Elements (2012) 8 (3): 181–182.
..., and minor amounts of Am and Cm isotopes. The concentration of plutonium in UO 2 fuel typically reaches a value of approximately 1% Pu for average burnups. Thus, most of the Pu present at the Fukushima Daiichi plant was in the normal UO 2 fuel in the reactors and spent fuel storage pools, as compared...
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Journal Article
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 567–578.
...R. L. Kimber; C. Boothman; P. Purdie; F. R. Livens; J. R. Lloyd Abstract Understanding the biogeochemical behaviour of actinides in the environment is essential for the long-term stewardship of radionuclide contaminated land. Plutonium is of particular concern due its high radiotoxicity, long half...
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Journal Article
Published: 01 August 2011
Mineralogical Magazine (2011) 75 (4): 2359–2377.
... in the use of actinide-bearing minerals, especially isometric pyrochlore, A 2 B 2 O 7 ( A = rare earths; B = Ti, Zr, Sn, Hf), for the immobilization of actinides, particularly plutonium, both as inert matrix fuels and nuclear waste forms. Systematic studies of rare-earth pyrochlores have led to the discovery...
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Journal Article
Journal: Elements
Published: 01 April 2011
Elements (2011) 7 (2): 77–78.
Journal Article
Published: 01 February 2010
American Mineralogist (2010) 95 (2-3): 229–241.
.... Plutonium and Ce (red) are coordinated by eight O atoms (blue). Plutonium appears to be more rounded than Ce in this structure, and the bonded ionic radius of Pu is slightly larger than that of Ce in the elongate O-cation bonds. T able 6. Enthalpies of formation for end-members and oxides from...
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Journal Article
Published: 01 August 2009
Vadose Zone Journal (2009) 8 (3): 574–585.
... in the environment and possible transport and exposure pathways need to be better understood and identified. Plutonium behavior in the environment depends on its very complex biogeochemical characteristics. Plutonium can exist in four different oxidation states (III, IV, V, and VI). In a gross sense, Pu(III...
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Journal Article
Published: 01 May 2008
Vadose Zone Journal (2008) 7 (2): 654–666.
... and modifiable by subsurface scientists and engineers (leaving the bulk of the parallelization to the preprocessor), to allow both sequential and parallel execution of the simulator, and to provide access to a variety of scalable linear system solvers and preconditioners. Plutonium recovery activities...
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Journal Article
Published: 01 May 2007
Vadose Zone Journal (2007) 6 (2): 344–353.
.... Plutonium distributions were anomalous in nature—transport from oxidized Pu sources was less than expected, and a small fraction of Pu from reduced sources moved more. Studies conducted with these lysimeter sediments indicated that surface-mediated, oxidation–reduction (redox) reactions may be responsible...
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Journal Article
Journal: Elements
Published: 01 December 2006
Elements (2006) 2 (6): 331–334.
..., the vitrified high-level waste from reprocessing of spent fuel, and actinide waste forms used for the disposal of “excess” plutonium from dismantled nuclear weapons. However, the expanded use of nuclear power, and in particular the development of advanced fuel cycles, will open up exciting opportunities...
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