Abstract
Different methods are introduced to solve the two group diffusion equations, which involve the mutual interaction of the power, void, and control rod distribution in the BWR. In the numerical examples by digital com puter (HIPAC-1 and IBM-650) calculations given, the results of one-dimensional forward method, backward methcd, and two-dimensional backward method are compared. The Peaceman-Rachford method is used to accelerate the convergence in the two- dimensional backward method. The utility of the backward method is particularly evident in two-dimensional studies. The correlative application of the forward methcd with the backward method seems to be necessary in the actual design of large boiling water reactors.
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