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本文借助铪指数实验研究了30％TBP-煤油-硝酸体系的辐照后效应。发现在上述体系中,当辐照剂量大于5×10~6拉德时,铪指数有一个持续很久的变化过程。这一变化过程能借助液氮的低温使其停止变化。当辐照剂量低于4.59×10~5拉德时就没有这个变化过程。实验证明,除了铪指数的“起始值”外,还存在一个“平衡值”,两者有很大的差别,因此,文献上所提出的0.5N的水相硝酸浓度对生成永久性有害降解产物是最有利的浓度这一结论是不全面的。实验结果表明,有害降解产物是一个含有活泼氢的次级辐解产物。
In this paper, the post-irradiation effect of 30% TBP-kerosene-nitric acid system was investigated by means of hafnium index experiment. Found in the above system, when the radiation dose is greater than 5 × 10 ~ 6 rad, the hafnium index has a long continuous change. This process of change can be stopped by the low temperature of liquid nitrogen. When the radiation dose is less than 4.59 × 10 ~ 5 Radian when there is no change in this process. Experiments show that, in addition to the “starting value” hafnium index, there is also a “balance value”, both very different, therefore, the proposed 0.5N aqueous nitric acid concentration in the literature to generate permanent harmful degradation The conclusion that the product is the most favorable concentration is not comprehensive. The experimental results show that the harmful degradation product is a secondary radiolysis product containing active hydrogen.