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根据单群微扰理论分析了CFBR-II堆反应性温度效应,给出了CFBR-II堆在稳态和脉冲两种运行工况下的反应性温度系数的理论计算公式,分析和讨论了影响CFBR-II堆反应性温度系数的各种因素。结果表明:CFBR-II堆稳态和脉冲反应性温度系数均为负值,其值各不相等;CFBR-II堆稳态反应性温度系数取决于堆体的结构尺寸及材料组成、堆体各部件之间以及堆体与堆外环境之间的换热条件,与稳态运行功率无关;堆脉冲反应性温度系数在整个脉冲过程中近似为常数,其值取决于堆体的结构尺寸及材料组成。
Based on the theory of single group perturbation, the reactivity temperature effect of CFBR-II reactor is analyzed. The theoretical calculation formula of the reactivity temperature coefficient of CFBR-II reactor under both steady-state and impulse operating conditions is given. The influence is also analyzed and discussed CFBR-II reactor temperature coefficient of the various factors. The results show that the steady-state and impulse temperature coefficients of CFBR-II stack are negative and their values are not equal. The steady-state temperature coefficient of CFBR-II stack depends on the structure and material composition of the reactor. The conditions of heat exchange between the components and between the pile body and the environment outside the pile are independent of the steady-state operating power. The temperature coefficient of the pile pulse reactivity is approximately constant throughout the pulse, and its value depends on the structural size of the pile body and the material composition.