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Bridging the Gap in the Chemical Thermodynamic Database for Nuclear Waste Repository: Studies of the Effect of Temperature on Actinide Complexation, in Nuclear Energy and the Environment;

机译:弥合核废物处置库化学热力学数据库中的差距:研究温度对on能络合物,核能和环境的影响;

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摘要

Recent results of thermodynamic studies on the complexation\udof actinides (UO22+, NpO2+ and Pu4+) with F-, SO42- and\udH2PO4-/HPO42- at elevated temperatures are reviewed. The data\udindicate that, for all systems except the 1:1 complexation of\udNp(V) with HPO42-, the complexation of actinides is enhanced\udby the increase in temperature. The enhancement is primarily\uddue to the increase in the entropy term (TΔS) that exceeds the\udincrease in the enthalpy (ΔH) as the temperature is increased.\udThese data bridge the gaps in the chemical thermodynamic\uddatabase for nuclear waste repository where the temperature\udcould remain significantly higher than 25°C for a long time\udafter the closure of the repository.
机译:综述了高温下act系元素(UO22 +,NpO2 +和Pu4 +)与F-,SO42-和\ udH2PO4- / HPO42-络合的热力学研究的最新结果。数据表明,对于除udNp(V)与HPO42- 1:1络合以外的所有系统,by系元素的络合均随温度升高而增强。增强主要是由于随温度升高,熵项(TΔS)的增加超过了焓(ΔH)的增加。\ ud这些数据弥合了化学热力学\ uddata核废料库中的空白储存库关闭后,温度很长一段时间仍可能会明显高于25°C。

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