Search Results - "Sims, Howard E."

Multi-Scale Modeling of the Gamma Radiolysis of Nitrate Solutions by Horne, Gregory P, Donoclift, Thomas A, Sims, Howard E, Orr, Robin M, Pimblott, Simon M

“…A multiscale modeling approach has been developed for the extended time scale long-term radiolysis of aqueous systems. The approach uses a combination of…”
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Radiation chemical processes in the water layer on the surface of PuO2 by Sims, Howard E., Orr, Robin M.

“…It is generally accepted that radiolysis of water on the surface of PuO 2 by alpha particles is the source of H 2 which can cause pressurisation in sealed…”
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Plutonium and Americium Alpha Radiolysis of Nitric Acid Solutions by Horne, Gregory P, Gregson, Colin R, Sims, Howard E, Orr, Robin M, Taylor, Robin J, Pimblott, Simon M

“…The yield of HNO2, as a function of absorbed dose and HNO3 concentration, from the α-radiolysis of aerated HNO3 solutions containing plutonium or americium has…”
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Molecular Hydrogen Yields from the α‑Self-Radiolysis of Nitric Acid Solutions Containing Plutonium or Americium by Gregson, Colin R, Horne, Gregory P, Orr, Robin M, Pimblott, Simon M, Sims, Howard E, Taylor, Robin J, Webb, Kevin J

“…The yield of molecular hydrogen, as a function of nitric acid concentration, from the α-radiolysis of aerated nitric acid and its mixtures with sulfuric acid…”
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Hydrogen yields from water on the surface of plutonium dioxide by Sims, Howard E., Webb, Kevin J., Brown, Jamie, Morris, Darrell, Taylor, Robin J.

“…► Hydrogen evolution due to water radiolysis on samples of Sellafield PuO2. ► Sharp increase in hydrogen evolution above 75% relative humidity. ► Hydrogen…”
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Modeling the critical hydrogen concentration in the AECL test reactor by Bartels, David M., Henshaw, Jim, Sims, Howard E.

“…Hydrogen is added to a pressurized water reactor (PWR) to suppress radiolysis and maintain reducing conditions. The minimum hydrogen concentration needed to…”
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A model of chemistry and thermal hydraulics in PWR fuel crud deposits by Henshaw, Jim, McGurk, John C., Sims, Howard E., Tuson, Ann, Dickinson, Shirley, Deshon, Jeff

“…A model is described for simulating thermal hydraulic and chemical conditions within fuel crud deposits. Heat transfer takes place by wick boiling in which…”
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Modelling Np(IV) Solvent Extraction between 30% Tri-Butyl Phosphate and Nitric Acid in the Presence of Simple Hydroxamic Acids by Sarsfield, Mark J., Sims, Howard E., Taylor, Robin J.

“…Formo- and aceto-hydroxamic acids are very effective reagents for stripping tetravalent actinide ions from a tri-butyl phosphate phase into nitric acid. A…”
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Extraction of Neptunium (IV) Ions into 30% Tri-Butyl Phosphate from Nitric Acid by Sarsfield, Mark J., Sims, Howard E., Taylor, Robin J.

“…The distribution of Np(IV) between 0.08-4.5 M HNO 3(aq,eqm) and ∼30% tributyl phosphate has been modelled, accounting for the formation of 1:1 and 1:2 nitrate…”
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Lithium reduction of a MOX pellet by Usami, Tsuyoshi, Kato, Tetsuya, Kurata, Masaki, Inoue, Tadashi, E. Sims, Howard, Jenkins, Jon A.

“…The MOX pellet of approximately 10g was reduced with lithium metal in molten lithium chloride at 923K. The pellet has high density and consists of 90% of…”
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Magnesium hydroxide bulk and colloid-associated 152Eu in an alkaline environment: colloid characterisation and sorption properties in the presence and absence of carbonate by Pitois, Aurelien, Ivanov, Peter I, Abrahamsen, Liam G, Bryan, Nick D, Taylor, Robin J, Sims, Howard E

“…The distribution of 152Eu between magnesium hydroxide bulk, colloids and solution has been assessed under alkaline conditions, such as those in nuclear fuel…”
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Chemical Reduction of SIM MOX in Molten Lithium Chloride Using Lithium Metal Reductant by Kato, Tetsuya, Usami, Tsuyoshi, Kurata, Masaki, Inoue, Tadashi, Sims, Howard E., Jenkins, Jan A

“…A simulated spent oxide fuel in a sintered pellet form, which contained the twelve elements U, Pu, Am, Np, Cm, Ce, Nd, Sm, Ba, Zr,Mo, and Pd, was reduced with…”
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