摘要
本文针对多群蒙特卡罗计算省时但共振自屏处理存在缺陷,以及连续截面蒙特卡罗输运计算精度高但计算费时的问题,发展了一种多群-连续截面耦合计算方法。该方法在自主研发的三维中子-光子耦合输运蒙特卡罗程序MCMG中得到应用,通过多个模型的计算验证了方法的有效性。MCMG耦合计算取得了与连续点截面MCNP程序一致的结果,其计算速度较MCNP的提高了1倍左右。
It is well known that the computation time of multigroup Monte Carlo calculation is much less than that of the continuous（point-wise） calculation.However,there are some difficulties in the multigroup treatment about resonance and self-shielding.Although the good precision of point-wise cross section transport calculation can be obtained,the consumed time is too long.A coupled calculation of the multigroup and the point-wise cross section was developed in self-development 3D neutron and photon transport Monte Carlo code MCMG.The validity of this method was proved by testing of many models.The almost same results with the point-wise cross section MCNP code were achieved.The coupled calculation of MCMG is about one time faster than that of MCNP.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第3期329-333,共5页
Atomic Energy Science and Technology
基金
中国工程物理研究院基金资助项目(2011A0103006
2012A0102005)
国家磁约束核聚变能研究专项资助(2010GB111001)
关键词
蒙特卡罗
共振自屏
多群-连续截面耦合计算
MCMG
MCNP
Monte Carlo
resonance and self-shielding
coupled calculation of multigroup and point-wise
MCMG
MCNP
