CAJ | 학술논문

232 U是燃料元件制造中需严格控制的铀同位素，为此，需建立一种准确的测量方法。本工作建立了一种α谱仪和质谱法相结合测定铀产品中232 U含量的新方法。采用质谱法测量234 U、235 U、236 U与238 U的同位素丰度比，α谱仪测量232 U的活度和234 U、235 U、236 U、238 U的总活度，即可计算出铀产品中232 U的浓度。对于232 U含量为1.118 ng／g的样品，16次测定数据的相对标准偏差为3.43％，证明该测量方法有效，可应用于实际样品的分析测定。
232 U시연료원건제조중수엄격공제적유동위소，위차，수건립일충준학적측량방법。본공작건립료일충α보의화질보법상결합측정유산품중232 U함량적신방법。채용질보법측량234 U、235 U、236 U여238 U적동위소봉도비，α보의측량232 U적활도화234 U、235 U、236 U、238 U적총활도，즉가계산출유산품중232 U적농도。대우232 U함량위1.118 ng／g적양품，16차측정수거적상대표준편차위3.43％，증명해측량방법유효，가응용우실제양품적분석측정。
232 U concentration is stringently controlled in nuclear fuel fabrication , an accurate determination method for determining 232 U concentration is needed .An analyti‐cal method was developed for the measurement of 232 U by combining of α spectrometry and mass spectrometry .The isotopic abundances ratio of 234 U ,235 U and 236 U to 238 U in samples were obtained with mass spectrometry ,and the total activities of 234 U ,235 U , 236 U and 238 U ,and the activity of 232 U were measured withαspectrometry .The concen‐tration of 232 U can be calculated .The uncertainty of the results was evaluated .The rela‐tive standard deviation of 16 analysis using this method is 3.43% for the samples with 1.118 ng/g 232 U .The results show that this method can be used for routine analysis in nuclear fuel fabrication plant .