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Cell Based CMFD Formulation for Acceleration of Whole-core Method of Characteristics Calculations  

Cho, Jin-Young (Korea Atomic Energy Research Institute)
Joo, Han-Gyu (Korea Atomic Energy Research Institute)
Kim, Kang-Seog (Korea Atomic Energy Research Institute)
Zee, Sung-Quun (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.34, no.3, 2002 , pp. 250-258 More about this Journal
Abstract
This Paper is to apply the well-established coarse mesh finite difference(CMFD) method to the method of characteristics(MOC) transport calculation as an acceleration scheme. The CMFD problem is first formulated at the pin-cell level with the multi-group structure To solve the cell- based multi-group CMFD problem efficiently, a two-group CMFD formulation is also derived from the multi-group CMFD formulation. The performance of the CMFD acceleration is examined for three test problems with different sizes including a realistic quarter core PWR problem. The CMFD formulation provides a significant reduction in the number of ray tracings and thus only about 9 ray tracing iterations are enough for the realistic problem. In computing time, the CMFD accelerated case is about two or three times faster than the coarse-mesh rebalancing(CMR) accelerated case.
Keywords
MOC; CMFD acceleration; ray tracing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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