한국원자력학회:학술대회논문집 (Proceedings of the Korean Nuclear Society Conference)
- 한국원자력학회 1996년도 춘계학술발표회논문집(1)
- /
- Pages.40-45
- /
- 1996
A Generalized Model for Homogenized Reflectors
- Pogosbekyan, Leonid (Korea Atomic Energy Research Institute) ;
- Kim, Yeong-Il (Korea Atomic Energy Research Institute) ;
- Kim, Young-Jin (Korea Atomic Energy Research Institute) ;
- Joo, Hyung-Kook (Korea Atomic Energy Research Institute)
- 발행 : 1996.05.01
초록
A new concept of equivalent homogenization is proposed. The concept employs new set of homogenized parameters: homogenized cross sections (XS) and interface matrix (IM), which relates partial currents at the celt interfaces. The idea of interface matrix generalizes the idea of discontinuity factors (DFs), proposed and developed by K.Koebke and K.Smith. The method of K.Smith can be simulated within framework of new method, while the new method approximates heterogeneous cell better in case of the steep flux gradients at the cell interfaces. The attractive shapes of new concept are: improved accuracy, simplicity of incorporation in the existing codes, equal numerical expenses in comparison to the K.Smith's approach. The new concept is useful for: (a) explicit reflector/baffle simulation; (b) control blades simulation; (c) mixed UO2/MOX core simulation, The offered model has been incorporated in the finite difference code and in the nodal code PANBOX. The numerical results show good accuracy of core calculations and insensitivity of homogenized parameters with respect to in- core conditions.
키워드