基于蒙特卡罗方法对VSOP模型的k_(eff)验证  

Verification of k_(eff) of VSOP Model Based on Monte-Carlo Method

作　　者：张竞宇[1] 李富[1] 魏春琳[1] 孙玉良[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2013年第3期350-354,共5页Atomic Energy Science and Technology

基　　金：国家重大科技专项经费资助项目(ZX06901)

摘　　要：VSOP程序广泛用于球床式高温气冷堆的工程设计,需对VSOP程序进行验证与确认。针对相同的高温气冷堆堆芯定义,比较了VSOP程序和蒙特卡罗程序采用特殊形状的重复结构来模拟随机分布的球床堆芯的建模结果。对VSOP模型中的侧反射层孔道进行均匀化处理,对球床顶锥和底锥的几何进行等效处理,用蒙特卡罗模型详细比较了近似处理为有效增殖因数keff带来的偏差。结果表明,VSOP模型中不同的近似处理方法会带来不同的偏差。但最终VSOP模型与最精细的蒙特卡罗模型在有效增殖因数方面差别不大,进一步说明VSOP模型的可用性和合理性。当然,VSOP程序和模型的验证还需要进一步深入研究。VSOP code is widely used in the engineering design of the pebble bed high-temperature gas-cooled reactor（HTR）,and the verification and validation（VV） are required to this code.Based on the same reference of HTR reactor core,the results from VSOP code and Monte-Carlo code were compared,and the random distribution of pebble bed was treated as the repeated structure of special shape in Monte-Carlo model.The homogenized channels in side reflector and equivalent cones in pebble bed were adopted in VSOP model,and the deviation of keff aroused from these simplification treatments was analyzed by Monte-Carlo model.The results show that the final difference in the keff between VSOP model and detailed Monte-Carlo model is not significant,which implies that the VSOP model is applicable and reasonable.Of course,the VV on VSOP code and model should be further extended.

关 键 词：球床式高温气冷堆 VSOP程序 验证与确认 蒙特卡罗模型 

分 类 号：TL329[核科学技术—核技术及应用]