Development of Research on the Boundary Flow Response Method

摘要

In recent years, lots of research has been done about the coarse mesh transport method based on the response matrix or response function method. Generally, a response function library should be prepared before the whole core calculation. This library consists of a series of response results to every basis of incident current or angular flux on the boundary of a coarse mesh. To expand the partial boundary current or angular flux of each coarse mesh, the cosine current and continuous Legendre polynomials were used for space distribution as well as the angular variables. Then in the whole core iteration, every boundary incident or outgoing current can be presented by just several moments to the basis. But obviously the error for corner pin powers would be considerable when boundary current could not be expanded perfectly unless higher order basis was used, which would bring much more calculation time.