[en] A photogalvanic effect has been found on irradiation of an acetonitrile solution of hydrated uranyl nitrate. The maximum voltage obtained is 0.6V. The influence of concentration, wavelength, cell geometry upon the electrical yield are shown. The suggested mechanism relies on the oxydation of water by the excited uranyl ion

No abstract available

[en] US DOE is examining options for disposing of surplus weapons-usable fissile materials and storage of all weapons-usable fissile materials. The nuclear material is converted to a form that is more proliferation-resistant than the original form. Examining options for increasing the proliferation resistance of highly enriched uranium (HEU) is part of this effort. Five technologies for blending HEU will be assessed. This document provides data to be used in the environmental impact analysis for the UNH blending HEU disposition option. Process requirements, resource needs, employment needs, waste/emissions from plant, hazards, accident scenarios, and intersite transportation are discussed

No abstract available

[en] Published in summary form only

[en] In the system UO₂(NO₃)₂ x 6H₂O/n-propanol the limiting ionic conductance of (1/2 UO₂²⁺) was found to be 12.31cm²Ω^-1 mol^-1 at 25⁰C, its association constant being 3.6 x 10⁹l² mol^-2. The corresponding values in the system UO₂(NO₃)₂ x 2H₂O/n-butanol are: lambda⁰ = 23.57cm²Ω^-1 mol^-1 and Ksub(A) = 1.5 x 10¹¹l² mol^-2. (orig.)

[en] The densities and water activities of uranyl nitrate hexahydrate in aqueous solutions at 298.15 K and 0.1 MPa were determined experimentally. Based over the experimental results, vapour pressures of aqueous solutions of uranyl nitrate hexahydrate have been estimated and reported. Reported data has been compared with the literature data. Uranyl nitrate hexahydrate was found completely soluble at ∼5 m aqueous strength against the reported limit of about 3.3 m by some researchers. (author)

[en] A visible emission has been reported for ²³³U samples that also contain traces of its ^229mTh α decay daughter; this emission has been ascribed to an electronic bridge mechanism coupling thorium's nucleus and electrons. The authors have recorded spontaneous (i.e., radioactivity-induced) and stimulated emission from uranium compounds and demonstrate that the 520 nm visible emission can actually be assigned to luminescence from the uranyl ion, the primary sample constituent

[en] Results of the experiments described in this paper indicated that recovery of uranium as uranyl nitrate hexahydrate (UO₂(NO₃)₂.6H₂O, hereafter referred as UNH) crystal was possible quantitatively from simulated PHWR fuel solution containing 400 g/L U and 2 N acidity. In the several experiments, recoveries exceeding 90% were also obtained. A general observation regarding recovery of 70% U could be made. A special run of 400 g/L, 6N acidity and synthetic fission product 1g/L Nd (as nitrate) was also taken and results indicated a decontamination factor of about 600 for a single crystallization followed by cold acid wash. More number of washings would improve this decontamination factor. (author)

[en] Published in summary form only