六角形组件源项计算方法研究

Research on Calculation Method for Hexagonal Assembly Source

为了满足水-水高能反应堆(VVER)或快堆屏蔽计算需求,编写了离散坐标(SN)和蒙特卡罗(MC)六角形组件源项计算程序,并且在VVER堆型上进行了验证。数值结果表明,对于吊篮内表面到压力容器外表面径向的三群中子和光子注量率分布,SN和MC计算得到的大部分中子和光子计算偏差小于30%,证明理论模型和程序是正确的,可以用于VVER或快堆的屏蔽计算。

In order to satisfy the requirement for Water-Water Energetic Reactor（VVER） or fast reactor shielding calculation, Discrete Ordinate（SN） and Monte Carlo（MC） hexagonal assembly source calculation codes are developed and validated on VVER. Numerical results show that relative errors are less than 30% for three group neutron and photon fluence rate distribution from the inner surface of the barrel to the outer surface of the reactor pressure vessel, which demonstrates that the theoretical model and codes in this paper are correct and can be used on VVER or fast reactor shielding calculation.