The flux volume weighting method which maintains the flux and reaction rates conservation of each group under reflective boundary conditions is the conventional cell-wise homogenization method and is widely used in reactor physics. However, there will be a certain error when net flows of cells' boundary are considerable. To overcome this deficiency, a new method for homogenization calculation based on the response relationship of inflow and outflow of cells' boundary is proposed in this paper. At first, related cross sections were corrected to get the same exit flow in the homogenized cell model as in the real cell model, given the same inflow. But since the reaction rates could no longer be maintained, little improvement could be achieved using the correction method. Then the new calculation method of homogenized cross sections was developed. Instead of taking the mean flux of the given volume as weight, the boundary flux was chosen in the new method. The verification on a slab problem with reflector and the 2-D C5G7MOX benchmark problem indicates that the new method can improve the accuracy for both the eigenvalue and pin power distribution, and result in little more calculation time, comparatively.
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