“…In the last few years, 1-dimensional codes, 1.5-dimensional codes and 2-dimensional codes, such as the RELAP5/MOD3 (Lu et al, 2009;Son et al, 2015), FRAPCON (Phillippe et al, 2012), FEMAX (Yoo et al, 2006) and FROBA (Deng et al, 2016) were used for the thermo-mechanical coupling analysis and safety analyses of the fuels. In order to improve the accuracy of the calculation, 3dimensional simulations based on MOOSE (He et al, 2018) and COMSOL (Liu and Zhou, 2017) were used.…”