【摘要】 采用蒙特卡罗中子输运程序计算小块燃料对金属型脉冲堆反应性的微扰系数，以质量逐渐减少的方式逐步逼近到线性范围内，获得满足一阶微扰近似条件的质量变化范围，逐点计算了微扰系数函数。然后采用ANSYS有限元程序计算了不同温度下的热膨胀，获得了膨胀后的位移分布。由微扰系数函数和位移分布获得了不同温度下的反应性，建立了基于微扰法的脉冲堆温度系数计算方法。计算得到了球形和柱形装置在脉冲状态和稳态的反应性温度系数。更多还原

【Abstract】 The perturbation coefficient of a little piece of fuel of metal burst reactors is calculated using the Monte Carlo neutron transport code. The mass range satisfying the first order perturbation approximate condition was got through gradually reducing fuel to approach the linear range. And then the perturbation function is calculated in the range. We also got the displacement distribution induced by thermal expansion using the ANSYS program. The calculating method of temperature coefficient is built on the basis of the perturbation function and displacement distribution. The temperature coefficients of sphere and columniation assembly are obtained at the burst state and steady state.更多还原