Analyzing method of hydroxysemicarbazide in nuclear fuel post-treatment process

Abstract

The invention provides an analyzing method of hydroxysemicarbazide in a nuclear fuel post-treatment process. The method includes the following steps: (1) preparing a series of standard aqueous solutions, preparing multiple volumetric flasks for holding a color developing agent and a buffer solution, preparing a first blank sample and a series of standard samples, measuring the absorbance value ofeach standard sample at a same feature absorption peak by using an ultraviolet-visible spectrophotometer by taking the first blank sample as a reference, and making a standard curve of absorbance varying with the concentration of the hydroxysemicarbazide; and (2) taking a to-be-measured sample, removing plutonium, preparing multiple volumetric flasks for holding the color developing agent and thebuffer solution, preparing a second blank sample and a to-be-measured sample, measuring a corresponding absorbance value by using the ultraviolet-visible spectrophotometer by taking the second blank sample as a reference, and substituting the corresponding absorbance value into the standard curve to calculate the concentration of the hydroxysemicarbazide in the sample.

Description

Technical field [0001] The invention belongs to the field of nuclear fuel post-treatment, and particularly relates to an analysis method of semihydroxyurea in a nuclear fuel post-treatment process. Background technique [0002] In the process of nuclear fuel reprocessing, both the uranium and plutonium separation and plutonium stripping sections use reducing agents to adjust the valence of plutonium to achieve separation of uranium and plutonium or purification and enrichment of plutonium. In order to minimize radioactive waste, the use of salt-free reagents as reducing agents has become a major development trend. In recent years, the Chinese Academy of Atomic Energy has researched a new salt-free reducing agent—semicarbazide, which has a fast reduction rate of plutonium, does not react with Np(Ⅵ) to produce Np(Ⅳ), and can interact with HNO 2 The rapid reaction does not require the addition of supporting reducing agents and other major advantages, and has good application prospec...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing hydroxysemicarbazide analysis method is difficult to apply to the nuclear fuel reprocessing process, the present invention provides an analysis method of hydroxysemicarbazide in the nuclear fuel reprocessing process

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