Pu(Ⅳ)和硝酸同时快速分析装置的研制

Development of Fast and Simultaneous Analysis Instrument of Pu(Ⅳ) and Nitric Acid

摘要: 利用InGaAs检测器与C-T固定光栅结合，外加光纤技术，研制了Pu(Ⅳ)和硝酸快速分析装置。应用NIST SRM2065标准物质测试表明，该仪器测量速度快、波长重复性好、稳定性高。采用该分析装置建立了后处理工艺中Pu(Ⅳ)和硝酸含量的快速分析方法，水相料液中硝酸和钚的测定范围分别为0.42～3.97 mol/L、1.07～25.26 g/L。

Abstract: Coupling C-T fixed-type grating with InGaAs detector, a new novel analytical instrument for measurement of nitric acid and Pu(Ⅳ) was successfully developed. Acquiring near infrared absorptive spectra (NIR spectra) with the spectroscopic instrument and processing data with PLS technique, a rapid and non-destructive method for measuring the nitric acid and Pu(Ⅳ) of reprocessing fuel solutions was established. The instrument shows excellent performances such as rapid measurement, good reproducibility of wavelength, and higher stability. For the measurement of nitric acid and Pu(Ⅳ) in aqueous solutions, the simple, fast and non-destructive method yields wide determination ranges from 0.42-3.97 mol/L, 1.07-25.26 g/L.