附水值为负值的八氧化三铀样品中铀含量的测定  

Determination of Uranium Content in Uranium Trioxide Samples Containing Negative Absorbed Water Value

作　　者：岳中慧 吴斌 宋茂生 柳金良 YUE Zhong-hui;WU Bin;SONG Mao-sheng;LIU Jin-liang(Research Institute No.230,CNNC,Changsha 410007,China)

机构地区：[1]核工业二三〇研究所

出　　处：《铀矿冶》2020年第1期39-43,共5页Uranium Mining and Metallurgy

摘　　要：对某U3O8(铀产品)样品进行铀含量测定,发现铀含量超出理论值且附水值为负值。由于没有附水值为负值的U3O8中铀含量测定的相关标准,本研究设计了2种针对附水值为负值的U3O8样品中铀含量测定的前处理方法:在50℃烘箱中和干燥器中去除水分。试验表明,50℃烘箱条件下需要3 h水分达到平衡,在干燥器里5 h水分达到平衡。经2种方法处理后,样品的测定结果与参考值相比,虽都略微偏低但均达到较为接近的程度。The uranium content in U3O8 sample was measured,which was found out that when the uranium content was beyond the theoretical value and the sample absorbed water,the analysis value was negative.Since there is no relevant standards about how to determine uranium content of U3O8 in the sample which absorbed water is negative,the study finds out two pre-treatment methods for the uranium sample which contains water content,which is dried at 50℃ in the oven or dried in the dryer.Test results show that when the sample is dried at 50℃ in the oven,moisture needs 3 h to reach equilibrium,and in the dryer it need 5 h to reach equilibrium.By process of two pre-treatment methods,although comparison with known results of uranium value,the measured uranium value is relatively lower,the value is within the allowable deviation.

关 键 词：八氧化三铀 二氧化铀 附水值 水分 

分 类 号：TL271.2[核科学技术—核燃料循环与材料]