CAJ | 학술논문

核燃料后处理工艺控制分析中，有机相中硝酸含量是一项重要的控制参数。通过研究TBP／正十二烷介质中硝酸的近红外光谱，将有机相样品的傅立叶变换近红外光谱与偏最小二乘回归法相结合，建立了含铀后处理有机相样品中硝酸浓度的测量方法。建立的定量校正模型的最佳校正标准偏差(RMSEC)、预测标准偏差(RMSEP)以及相关系数(r)分别为0.011，0.014，0.999。方法检出限为0.05 mol／L，测量结果的相对标准偏差不大于4%(n=6)。采用近红外分析法与滴定法对模拟样品进行测量，对测量结果进行t检验，结果表明两种方法的测定结果无显著性差异。所建方法无需样品预处理，可直接测量，分析速度快，结果准确，具有一定的实用性。
핵연료후처리공예공제분석중，유궤상중초산함량시일항중요적공제삼수。통과연구TBP／정십이완개질중초산적근홍외광보，장유궤상양품적부립협변환근홍외광보여편최소이승회귀법상결합，건립료함유후처리유궤상양품중초산농도적측량방법。건립적정량교정모형적최가교정표준편차(RMSEC)、예측표준편차(RMSEP)이급상관계수(r)분별위0.011，0.014，0.999。방법검출한위0.05 mol／L，측량결과적상대표준편차불대우4%(n=6)。채용근홍외분석법여적정법대모의양품진행측량，대측량결과진행t검험，결과표명량충방법적측정결과무현저성차이。소건방법무수양품예처리，가직접측량，분석속도쾌，결과준학，구유일정적실용성。
In the reprocessing process control analysis, the content of the nitric acid is an important parameter. The method to determine the content of nitric acid in organic feed solution in nuclear fuel reprocessing process was established by combining NIR spectroscopy and partial least squares(PLS)method on the basis of investigation of NIR spectrum of nitric acid in 30%TBP/dodecane mixed uranium liquids. The RMSEP,RMSEC,correlation coefficient of the calibration model were 0.011,0.014,0.999,respectively.The detection limit of the method was 0.05 mol/L, the relative standard deviation of detection results was not more than 4%(n=6). The NIR spectroscopy and titration method were used for the determination of modeling sample,and it is indicated that there is no significant difference between two methods by t test. The method is rapid and accurate,it can be used for direct measurement without sample pretreatment.