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为快速求解反应堆三维时空动力学方程 ,克服已有方法的局限 ,提出了一种新的求解方法。该方法在时间方面 ,中子通量密度按时间二阶展开 (QEM) ;在空间方面 ,采用Green函数节块法 (NGFM)。根据对模型的校算表明 ,在相近计算精度下 ,它的时间步长可以放大到全隐式差分方法(FIM)的 5～ 2 0倍 ,而且 Green函数节块法的空间网格可以放大到有限差分方法的约 2 0倍。所以 ,时间上二阶展开的Green函数节块法 (TQE/NGFM)是一种先进的反应堆动力学方程的求解方法
In order to solve the 3D space-time dynamic equations of the reactor quickly and overcome the limitation of the existing methods, a new solving method is proposed. In terms of time, the neutron flux density is expanded by the second order of time (QEM). In the aspect of space, Green function nodal method (NGFM) is adopted. According to the calculation of the model, it shows that its time step can be enlarged to 5 ~ 20 times of the FIM by the similar calculation precision, and the space grid of the Green function nodal method can be enlarged to About 20 times the finite difference method. Therefore, the Green function nodal method (TQE / NGFM), which is expanded in time by the second order, is an advanced method for solving reactor kinetic equations