任意几何燃料组件共振自屏计算的Multiband方法  

Multiband Method for Resonance Self-Shielding Calculation of Fuel Assembly in Arbitrary Geometries

作　　者：黄伟兵[1] 吴宏春[1] 曹良志[1] 杨伟焱[1] 

机构地区：[1]西安交通大学核科学与核技术学院,西安710049

出　　处：《核动力工程》2009年第3期38-42,共5页Nuclear Power Engineering

基　　金：国家自然科学基金(10605017)资助项目

摘　　要：基于多邦方法(Multiband Method)理论模型,推导了多邦参数的计算公式。采用两邦与三邦相结合的方法,基于WIMSD4-69群数据库,编制了可用于任意几何燃料组件共振自屏计算的RESCAL程序。通过数值验证表明,RESCAL程序与MCNP程序的计算结果吻合很好,计算误差满足工程实际要求。由于WIMSD4-69群数据库本身的限制及拟合多邦参数方法的问题,使得RESCAL程序的计算精度受水铀比影响较大。A formula to calculate the multiband parameters is derived based on the multiband method. Adopting the method combining two-band and three-band, and based on the WIMSD4-69 library, a code named RESCAL is developed. The validation shows that the results of RESCAL code are well in accordance with MCNP＇s, and the numerical errors meet the practical requirement. Due to the limitation of WIMSD4 69-group library and the method adopted to calculate multiband parameters, the precision of RESCAL code is highly affected by the ratio of water to uranium.

关 键 词：燃料组件 共振 自屏 多邦方法 任意几何 

分 类 号：TL329.3[核科学技术—核技术及应用]