Abstract
Transplutonium isotopes are scarce and need to be produced by irradiation in high flux reactors. However, their production is inefficient, and optimization studies are necessary. This study analyzes the physical nature of transplutonium isotope production using 252Cf, 244Cm, 242Cm, and 238Pu as examples. Traditional methods based on the Monte Carlo burnup calculation have the limitations of many calculations and cannot analyze the individual energy intervals in detail; thus, they cannot support the refined evaluation, screening, and optimization of the irradiation schemes. After understanding the physical nature and simplifying the complexity of the production process, we propose a rapid diagnostic method for evaluating radiation schemes based on the concepts “single energy interval value (SEIV)” and “energy spectrum total value (ESTV)”. The rapid diagnostic method not only avoids tedious burnup calculations, but also provides a direction for optimization. The optimal irradiation schemes for producing 252Cf, 244Cm, 242Cm, and 238Pu are determined based on a rapid diagnostic method. Optimal irradiation schemes can significantly improve production efficiency. Compared with the initial scheme, the optimal scheme improved the production efficiency of 238Pu by 7.41 times; 242Cm, 11.98 times; 244Cm, 65.20 times; and 252Cf, 15.08 times. Thus, a refined analysis of transplutonium isotope production is conducted and provides a theoretical basis for improving production efficiency.
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The data that support the findings of this study are openly available in Science Data Bank at https://doi.org/10.57760/sciencedb.j00186.00039 and https://cstr.cn/31253.11.sciencedb.j00186.00039.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Qing-Quan Pan, Qing-Fei Zhao, Lian-Jie Wang, Bang-Yang Xia, Yun Cai, and Xiao-Jing Liu. The first draft of the manuscript was written by Qing-Quan Pan, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This work is sponsored by Natural Science Foundation of Shanghai (NO. 22ZR1431900) and Science and Technology on Reactor System Design Technology Laboratory.
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Pan, QQ., Zhao, QF., Wang, LJ. et al. Rapid diagnostic method for transplutonium isotope production in high flux reactors. NUCL SCI TECH 34, 44 (2023). https://doi.org/10.1007/s41365-023-01185-4
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DOI: https://doi.org/10.1007/s41365-023-01185-4