Sensitivity Analysis of Thermal Correlations on Coupling Calculation of Reactor Physics and Thermal-Hydraulics

For analyzing the sensitivity on reactivity feedbacks of thermal–hydraulics,Qinshan-I reactor coolant system is simulated by the coupling codes of nuclear reactor core physics simulation model REMARK and thermal–hydraulic model THEATRe on SIMEXEC simulation platform.Different correlations are applied in the coulping codes corresponding to the suitable thermal–hydraulic conditions.The sensitivity on reactivity feedbacks of the different correlations are analyzed with the simulation results.The result shows that MИxeeB correlation and Shah correlation are most sensitive in the heat transfer correlations,and the correaltions of computing flow friction are insensitive on reactive feedback.