深穿透屏蔽计算的离散坐标法

Discrete Ordinates Method of Deep Penetration Shielding Calculation

建立了堆芯几何和孔道几何边界源相耦合的离散坐标法 ,并用于计算反应堆孔道的深穿透屏蔽问题 .推导出可用于堆芯几何屏蔽计算的半对称求积基 ,以及用于孔道几何屏蔽计算的偏向求积基 .提出了两端几何边界源转换模型 .将上述方法用于TRIGAMARKII堆径向孔道的屏蔽计算 .计算结果表明 ,堆芯几何采用S10半对称求积基、孔道几何采用二阶S10偏向求积基的计算值接近于实验值 ,且与蒙卡程序MCNP/ 4B的计算值基本一致 .

A discrete ordinates method is developed to solve the reactor duct deep penetration shielding problem. Derived are the half symmetric angular quadratures uses for core shielding calculation and biasing angular quadratures used for duct shielding calculation where impling of boundary source of core and duct geometry is established . The method is then used for the radial duct shielding calculation of TRIGA MARK II reactor. Made accessible are results of measurements and those associated with MCNP/4B.