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Showing 1 to 20 of 128 for “"plutonium"”.
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Plutonium Economics Reprocessing Model
Made available in DSpace on 2017-07-06T18:48:55Z (GMT). No. of bitstreams: 3 Kaspar_Tod_E_MS.pdf: 29785128 bytes, checksum: c3b17a5113c208bf9f38e614b6d58744 (MD5) Kaspar_Tod_E_MS_ABS.pdf: 523460 bytes, checksum: 05bac6ee5cd2c4556fc9c924991a68bc (MD5) license.txt: 4813 bytes, checksum: …
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Plutonium pharmacokinetics and blood biochemistry
… its discovery in the early 1940s the element plutonium has been seen by mankind as both an opportunity and a threat. As a radioactive nuclide plutonium presents health hazards in its handling and if mankind is to make the most of this element's potential benefits it is essential that these …
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Plutonium isotopes in the North Atlantic
The artificial radionuclide Plutonium (Pu) has been introduced into the environment primarily as fallout from atmospheric nuclear weapons testing during the 1950's and 1960's. Earlier studies of Pu geochemistry are generally based upon the measurement of the combined activities of 239Pu and 249Pu …
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Plutonium isotopes in the North Atlantic
Thesis (Ph. D.)--Joint Program in Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1986.
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Plutonium uptake by brucite and hydroxylated periclase
Includes bibliographical references (pages 103-111).
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A strategy for weapons-grade plutonium disposition
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
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Accelerator-based conversion of weapons-grade plutonium
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Characterizations of plutonium nitrate solutions for criticality calculations
In the modeling of plutonium nitrate systems for criticality calculations, the chemical formula is usually assumed to be Pu(N03)4 (where plutonium is in the +4 valence state). However in a unique situation of chemistry, plutonium has four oxidation states (III), (IV), (V), and (VI) that can exist …
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Solubility and speciation of plutonium(VI) with orthophosphate
Pu(VI) speciation and solubility with phosphate was examined at pH from 0.3 to 12.2, Pu(VI) concentrations from 5 $\times\ {\rm 10}\sp{-5}$ M to 1.3 $\times\ {\rm 10}\sp{-3}$ M and phosphate concentrations up to 0.6 M. Absorption spectroscopy, solubility experiments, scanning electron microscopy …
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Self-protection analysis of denatured thorium-plutonium fuel
… research has examined the use of thorium-plutonium mixedoxide fuel as a potential candidate for this high-burnup goal. Though the neutronics studies have looked upon this fuel type favorably, the purpose of this paper is to investigate the self-protection capabilities of this fuel type, …
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Weapons-grade plutonium disposition : an alternate immobilization strategy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1997.
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An analysis of plutonium accountability in the COPRECAL process
… goals, the existing process which generates plutonium-nitrate solution must be altered to generate plutonium-uranium oxide powder. The COPRECAL process is designed to produce this solid. The COPRECAL process allows uranium and plutonium to be extracted from spent-fuel for reuse in commercial …
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The design and evaluation of an international plutonium storage system
To address the proliferation risk of separated plutonium, a technical and institutional design of an international plutonium storage system (IPSS) is presented. The IPSS is evaluated from two perspectives: its ability to address the proliferation risk of excess civilian inventories, and its ability …
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Fertile free fuels for plutonium and minor actinides burning in LWRs
… of using various uranium-free fuels for plutonium incineration in present light water reactors is investigated. Two major categories of inert matrix fuels are studied: composite ceramic fuel particles dispersed in another ceramic matrix (CERCER) and ceramic fuel particles dispersed into a …
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The mobility of radiocesium and plutonium in Roach Lake in southern Nevada
… using high purity germanium detectors. the plutonium analysis was performed, after chemical separation, by the detection of its alpha particle emissions with surface barrier detectors. Strontium-90 was determined at only one site, after extraction from the samples, by measuring its daughter …
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High-precision isotope ratio measurements of uranium and plutonium in the environment
… air filters from Germany.<br/>Application IIA: Plutonium isotopes have been measured in a sediment core from the Wyre saltmarsh. Radionuclide contamination in this area is much higher than in many other UK sites because of its incorporation of discharges from the BNFL Sellafield. A model for the …
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Management of the UK plutonium stockpile using thorium fuelled Light Water Reactors
… for the world’s largest stockpile of civil plutonium (Pu). The intention is to manage the stockpile through the implementation of an appropriate recycling strategy, expected to centre around the use of Mixed OXide (MOX) fuelled Light Water Reactors (LWRs). Typically, MOX fuel involves the …
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