蒙特卡罗方法在中子时空动力学问题中的应用

基金项目:

国家重点基础研究发展计划资助(2007CB209800)

国家自然科学基金资助项目(10775081)

Application of Monte Carlo Methods to Neutron Space-Time Kinetics

摘要: 对现有用于解决核反应堆时空动力学问题的基于输运理论的各种方法与计算机程序系统进行了分析。综合考虑了确定论方法和蒙特卡罗方法求解输运问题的优缺点,提出一种以蒙特卡罗方法为基础的直接模拟方法。该方法通过直接模拟堆芯内中子和先驱核的动态行为来实现对瞬态问题的求解,取消了现有方法的各种近似,具有普适通用性。为了验证该方法的有效性,在一定近似处理的前提下,开发出了相应的程序,并计算了相关的问题。结果表明,该方法用于计算各种核反应堆动力学问题是可行的。
- 中子输运 /
- 中子时空动力学 /
- 直接模拟 /
- 连续能量 /
- 瞬态
Abstract: The paper proposes a method of direct simulation, which is based on Monte Carlo methods, for solving the neutron space-time kinetics problems. By directly simulating the behavior of neutrons and precursors of delayed neutrons, results are obtained. Eliminating various approximate approaches that are always necessary for other methods, this method is universal. To check its validation, relevant program has been developed with appropriate approximations, and has been used to calculate the test problems. The calculation results show it is practical to deal with the kinetics problem by the direct simulation approach.
- Neutron transport /
- Neutron spacetime kinetics /
- Direct simulation /
- Continuum energy /
- Transient