【摘要】 甲异羟肟酸(FHA)是有望用于乏燃料后处理的新型无盐络合剂。本工作用紫外分光光度法研究了FHA的γ辐照稳定性,并且研究了硝酸和甲基肼对FHA辐照稳定性的影响。结果表明,当剂量为10~1000 kGy时,FHA在水溶液中的辐照稳定性随FHA浓度的增加而增大,但随剂量的增加而降低;在HNO3-0.2 mol/L FHA体系中,当HNO3浓度为0.2 mol/L时,FHA的辐照稳定性略有增加,但当c(HNO3)≥0.5 mol/L时,FHA的辐照稳定性降低;在甲基肼-1.0 mol/L HNO3-0.2 mol/L FHA体系中,FHA的辐照稳定性随甲基肼浓度的增加而增大。更多还原

【Abstract】 Formohydroxamic acid(FHA) is a new saltless reagent which may be used in the reprocessing of spent nuclear fuel.This paper reports the study on the γ radiation stability of FHA by ultraviolet-visible spectrophotometry,as well as the effect of nitric acid and monomethylhydrazine(MMH) on radiation stability of FHA.The results show that the radiation stability of FHA in aqueous solution increases with the concentration of FHA when the doses are from 10 to 1 000 kGy,but decreases with the dose rising.In HNO3-0.2 mol/L FHA solution,the radiation stability of FHA slightly increases when the concentration of HNO3 is 0.2 mol/L,but decreases when the concentration of HNO3 is not less than 0.5 mol/L.In MMH-1.0 mol/L HNO3-0.2 mol/L FHA solution,the radiation stability of FHA increases with the concentration of MMH.更多还原