AUTHOR=Lou Lei , Peng Xingjie , Chai Xiaoming , Yao Dong , Li Mancang , Wang Lianjie , Chen Liang 

TITLE=The Ring RPT Method for DH Systems Containing Dispersed Particle-Type of Fuel and Burnable Poisons

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.704307

DOI=10.3389/fenrg.2021.704307

ISSN=2296-598X

ABSTRACT=Because of the double heterogeneity of double heterogeneous (DH) system with both dispersed particle-type fuel and burnable poison, the traditional volumetric homogenization method (VHM) on DH systems will bring unacceptable calculation deviation. IRPT (Improved Reactivity-Equivalent Physical Transformation) method applied to some DH systems which have both particle-type dispersed fuel and burnable poison has the features of simplicity and high calculation accuracy. The calculations in this article show that IRPT method becomes invalid for some DH systems when volume fraction of dispersed particle-type burnable poison is relatively high or the absorb cross section of burnable poison particles is relatively large. And then Ring RPT method is can be used to the DH system with both dispersed particle-type fuel and burnable poison. Results of depletion calculations for different types of dispersed particle-type burnable poisons and the comparison with Mote Cola results of grain models prove the validity of Ring RPT method, preliminary conclusion can be obtained that Ring RPT method has wider scope of usage and higher accuracy than IRPT method.