AUTHOR=Rao Junjie , Peng Xingjie , Yu Yingrui , Li Qing , Wang Kan TITLE=Pin-resolved ultra-fine-group with correction method and its application to plate-type fuel reactor analysis JOURNAL=Frontiers in Energy Research VOLUME=10 YEAR=2023 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.1035828 DOI=10.3389/fenrg.2022.1035828 ISSN=2296-598X ABSTRACT=

In order to perform the resonance calculation efficiently and accurately, several pin-resolved ultra-fine-group methods combining the ultra-fine-group method and Dancoff factor have been developed recently. The ultra-fine-group method is used to consider the self-shielding effect accurately in the 1-D fuel model, and the Dancoff factor is used to consider the shadowing effect in a lattice system. The pin-resolved ultra-fine-group with correction method, combining the ultra-fine-group method and Dancoff factor, is implemented in a transport code using the method of characteristic. In order to expand the application range, the pin-resolved method is extended for the plate-type fuel. Numerical results show good accuracy for the plate-type fuel reactor analysis.