ADS系统中少錒系核素的灵敏度分析

刘萍; 赵志祥

doi:10.11804/NuclPhysRev.21.01.070

ADS系统中少錒系核素的灵敏度分析

刘萍,
赵志祥

Nuclear Data Sensitivity of Minor Actinides on Accelerator driven Burner System

摘要

摘要: 为了确定加速器驱动系统中少錒系核素的核数据的不确定性对此系统中积分参数的影响，选择一铅铋冷却次临界系统来进行分析，选择不同的微观评价库CENDL3.0 ， JENDL3.2及ENDF/BVI.6，并只考虑20 MeV以下的中子产额，来计算次临界系统的积分参数. 以ENDF/BVI.2 库的计算结果作为参考结果，依次用CENDL3.0库及JENDL3.2库中相应的錒系核素替换ENDF/BVI.6 库中的錒系核素，计算了次临界系统的Keff值及反应率，并就变换主要錒系核素时对所计算的Keff值及反应率的影响进行了分析、比对. 在堆芯处，当改变錒系核素时Keff值总的变化为30%， CENDL3.0的238Pu的弹性散射反应率比ENDF/BVI 库的结果高出10%， ENDF/BVI 库的242Am的裂变率超过了CENDL3.0库的15%. In order to investigate the effect of minior actinide data on integral parameter, the acceleratordriven minior actinide benchmark system was selected in this work. The library based on ENDF/BVI.2 was used for the reference calculation. The sensitivities were examined by exchanging the minior actinides of CENDL3.0 and JENDL3.2 one after another. The Keff values and reaction rates were calculated. According to the comparisons, the difference in Keff from the refrence is more than 3‰, and the fission reaction rate of 242Am is about 15% lower than those of reference results. The elastic scattering reaction rate of 238Pu of CENDL3.0 is about 10% larger than those of ENDF/BVI.

Abstract: In order to investigate the effect of minior actinide data on integral parameter, the acceleratordriven minior actinide benchmark system was selected in this work. The library based on ENDF/BVI.2 was used for the reference calculation. The sensitivities were examined by exchanging the minior actinides of CENDL3.0 and JENDL3.2 one after another. The Keff values and reaction rates were calculated. According to the comparisons, the difference in Keff from the refrence is more than 3‰, and the fission reaction rate of 242Am is about 15% lower than those of reference results. The elastic scattering reaction rate of 238Pu of CENDL3.0 is about 10% larger than those of ENDF/BVI.

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