核能 核燃料技术 用分光光度法测定硝酸溶液中的镎

[中文适用范围]： 本文件规定了一种用分光光度法测定镎浓度的分析方法，使用热室或手套箱中的分光光度计，可以分析核反应堆辐照燃料溶解后硝酸溶液中的高活性溶液，标准不确定度约为 5%，覆盖因子 k = 1，在核燃料后处理厂或其他核设施的不同工艺步骤中。该方法适用于镎浓度在 10 mg·l-1 至 400 mg·l-1 之间、铀浓度高达 300 g·l-1 的工艺样品。 [外文原描述]： This document specifies an analytical method for determining the neptunium concentration by spectrophotometry, with spectrophotometer implemented in hot cell or glove box allowing the analysis of high activity solutions, with a standard uncertainty, with coverage factor k = 1 of about 5 %, in nitric acid solutions after the dissolution of nuclear reactor irradiated fuels, at different steps of the process in a nuclear fuel reprocessing plant or in other nuclear facilities. The method is applicable to sample from the process containing a concentration of neptunium between 10 mg·l -1 and 400 mg·l -1 and uranium concentrations of up to 300 g·l -1 .