用DCE/CEM和LAHET软件计算ADS标准散裂靶的比较

Comparison of calculation results of standard spallation target in ADS with DCM/CEM and LAHET codes

利用蒙卡程序DCM/CEM和LAHET对加速器驱动的次临界系统ADS标准散裂中子靶进行了计算。长为0.6m、直径为0.2m的圆柱形Pb靶在0.15—1.6GeV的高能质子轰击的情况下,利用两软件对质子在靶208内的能量沉积、Pb靶发生散裂反应产生的中子及靶内和表面的中子注量、中子能谱分布等进行了比较计算。结果表明:两者模拟结果在中能区(0.8—1.0GeV)符合很好,但在质子能量较高或较低时,两者略有差别。

The standard spallation target of ADS (Accelerator-Driven System) was theoretically calculated with Monte Carlo codes of DCM/CEM and LAHET in the present work. The spallation target (0.6 m long and 0.2 m in diameter) bombarded with 0.15—1.6 GeV energetic proton beam was simulated. The proton energy deposition in tar- get, neutron yield, neutron fluence distribution on the outer surface of target and the neutron spectrum distribution were simulated with the two codes. It is shown that, in the proton energy range of 0.8—1.0 GeV, both calculated re- sults agree to each other; but when the proton energy falls outside this energy range, there are some differences be- tween the results with both codes.