为了准确分析核设施停机后周围空间的三维辐射剂量场分布情况,基于严格两步法(rigorous two step method,R2S)停堆剂量计算的方法,开发了基于蒙特卡罗输运计算程序MCNP5和燃耗计算程序ORGEN2.1耦合的三维停堆剂量计算程序MOCA,实现了中...为了准确分析核设施停机后周围空间的三维辐射剂量场分布情况,基于严格两步法(rigorous two step method,R2S)停堆剂量计算的方法,开发了基于蒙特卡罗输运计算程序MCNP5和燃耗计算程序ORGEN2.1耦合的三维停堆剂量计算程序MOCA,实现了中子输运计算、材料活化计算和光子剂量计算的自动耦合,并通过中子辐照例题与SuperMC程序进行对比验证,结果表明MOCA的计算结果与SuperMC计算的结果吻合较好,可以为核设施的运维检修以及退役的剂量率空间分布提供参考数据。展开更多
Origen2.1 is a widely used computer code for calculating the burnup, decay, and processing of radioactive materials. However, the nuclide library of Origen2.1 is used for existing reactors like pressurized water react...Origen2.1 is a widely used computer code for calculating the burnup, decay, and processing of radioactive materials. However, the nuclide library of Origen2.1 is used for existing reactors like pressurized water reactors. To calculate the photon spectrum released by the decay of spallation products, we have made specific libraries for the ADS tungsten spallation target, based on the results given by the FLUKA Monte Carlo code. All the data used to make the Origen2.1 libraries are obtained from Nuclear structure ＆ decay Data （NuDat2.6）. The accumulated activity of spallation products and the contribution of nuclides to photon emission are given in this paper.展开更多
文摘为了准确分析核设施停机后周围空间的三维辐射剂量场分布情况,基于严格两步法(rigorous two step method,R2S)停堆剂量计算的方法,开发了基于蒙特卡罗输运计算程序MCNP5和燃耗计算程序ORGEN2.1耦合的三维停堆剂量计算程序MOCA,实现了中子输运计算、材料活化计算和光子剂量计算的自动耦合,并通过中子辐照例题与SuperMC程序进行对比验证,结果表明MOCA的计算结果与SuperMC计算的结果吻合较好,可以为核设施的运维检修以及退役的剂量率空间分布提供参考数据。
基金Supported by Strategic Priority Research Program of Chinese Academy of Sciences(XDA03030102)
文摘Origen2.1 is a widely used computer code for calculating the burnup, decay, and processing of radioactive materials. However, the nuclide library of Origen2.1 is used for existing reactors like pressurized water reactors. To calculate the photon spectrum released by the decay of spallation products, we have made specific libraries for the ADS tungsten spallation target, based on the results given by the FLUKA Monte Carlo code. All the data used to make the Origen2.1 libraries are obtained from Nuclear structure ＆ decay Data （NuDat2.6）. The accumulated activity of spallation products and the contribution of nuclides to photon emission are given in this paper.
