辐照后核燃料中钚的放化分析

• 作 者: 魏启慧 高晶荣
• 机 构: 原子能研究所,原子能研究所
• 出 处: 核化学与放射化学
• 发表日期: 1984年03期
• 关键词: 同位素 放化-α谱法 钚同位素浓度 核燃料 萃取 对称关系 轴向分布 浓度 溶解液 线性关系

本文研究了不需外加钚标准的放化-α谱法测定钚同位素浓度的方法。铀元件溶解液中钚用三异辛胺萃取、抗坏血酸反萃,直接在反萃液中电沉积制源,电沉积率达(100.0±0.5)％,因而使全程序钚的回收率稳定在(98.5±0.5)％。方法简便、灵敏(取钚量～0.2微克)。一根元件切片后测钚同位素浓度,沿轴向分布有对称关系,与已知的燃耗值(~(148)Nd)有线性关系。

In this paper, the method of determination of plutonium isotope concentration by radiochemical-alpha spectrometry without the need of extra plutonium standard was studied. The plutonium in the uranium solution was extracted with tri-iso-octylamine and the ascorbic acid was back-extracted. The electrodepositing rate was (100.0 ± 0.5)% directly in the stripping solution, thus stabilizing the recovery rate of the whole program of plutonium in ( 98.5 ± 0.5)%. Method is simple and sensitive (take plutonium amount ~ 0.2 micrograms). The concentration of isotopes of plutonium measured after slicing an element is symmetrical along the axial direction and has a linear relationship with the known burnup (~ (148) Nd).