三维带控制棒反应性温度系数的计算分析

Study on Calculation of ReactivityTemperature Coefficient Using 3 Dimensional Code with Control Rods

介绍了三维带控制棒计算反应性温度系数的计算方法，对于２００ＭＷ供热堆，在不同棒位下作了三维反应性温度系数的计算，结果表明，慢化剂温度系数的大小和控制棒插入的深度有一定关系。以运行工况临界棒位下的慢化剂温度系数为参考，对二维计算结果作了分析，结果表明二维无控制棒计算是保守的近似。

The calculating method of reactivity temperature coefficient using 3 dimensional code with control rods is presented in this paper.The reactivity temperature coefficient with different rod positions is calculated by 3 dimensional code for 200MW nuclear heating reactor (NHR).The results show that moderator temperature coefficient is closely related to the position of control rod.The moderator temperature coefficient calculated by 2 dimensional code was analysed based on by 3 dimensional code with critical rod positions.They show that results calculated by 2 dimension code without control rods are a conservative approximation.