30%TBP-煤油-硝酸体系的α和γ辐照行为
α and γ Irradiation Stability of 30%TBP-Kerosene-HNO3 Systems
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摘要: 研究了30%TBP-煤油-硝酸体系的α和γ辐照稳定性，包括溶剂辐照吸收剂量、预平衡酸度等条件对溶剂辐解产物及金属钚保留值的影响。结果表明：溶剂吸收剂量对溶剂辐解产物和钚保留值影响较大，而预平衡酸度则影响较小，主要辐解产物产生量和钚保留值均随溶剂体系α、γ吸收剂量和预平衡酸度的增大而增加。在相同的条件下，溶剂的α辐照造成的钚保留值均比γ辐照大，而DBP、MBP和羰基化合物等辐解产物的产生量均随辐照吸收剂量增加而增加，但其产生量相差不明显。产生上述结果的可能原因是α辐照加速了次级或其它辐解产物的生成。Abstract: The radiation stability of 30%TBP-kerosene-HNO3 during α or γ irradiation was studied. The results show the radiation dose is the primary factor affecting degradation products and plutonium retention in the organic phase. Degradation products and plutonium retention in irradiated TBP extraction system increases with the radiation dose and the concentration of preeqilibration nitric acid before irradiation. The plutonium retention in irradiated TBP extraction system by α irradiation is more than by γ irradiation. However, the concentrations of carbonyl compounds, dibutyl phosphate and monobutyl phosphate in irradiated organic phase increase with the radiation dose during α or γ irradiation, but the produced quantity are approximately the same for each radiolysis product. The possible reason of causing the above mentioned phenomena may be attributed to the acceleration of the secondary degradations and the formation of other products by α irradiation.
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Keywords:
- spent fuel reprocessing /
- α irradiation /
- γ irradiation /
- TBP /
- plutonium retention
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