MCNP在计算硼酸质量分数影响反应堆有效增值系数K_(eff)值中的应用

MCNP in the Application of the Affect in Simulate the Value of Boron Acid Acts on the Critical Factor K_(eff)

运用蒙特卡罗方法中的MCNP程序建立秦山某核电站模拟计算模型,构建出反应堆压力容器及压力容器内堆芯组件成分及排布,利用KCODE卡计算反应堆中硼酸质量分数对有效增值系数Keff值的影响。计算结果表明:在不考虑控制棒和可燃毒物对反应堆有效增值系数Keff值影响的情况下,随着硼酸质量分数的增大,有效增值系数Keff值线性从1.33047降到1.02484,计算结果与实际值一致。

In this paper, Monte Carlo method were used in the MCNP procedures for the establishment of Qinshan nuclear power station simulation model, construct the reactor pressure vessel and vessel core component composition and arrangement, KCODE card were used to calculate the effect of the effective value-added factor Kνeff by the boron acid .The calculation results show that, without considering the control rods and the burnable poison on the reactor effective value-added factor Keff, with the increasing of the boric acid concentration, Keff linear dropped from 1.330 47 to 1.024 84, the results consistent with the actual value.