Theoretical analysis for coupled thermal deformation behaviors of subassemblies in a single row in sodium-cooled fast reactors

•Equilibrium equations and compatibility equations were conducted respectively to consider coupling effects of subassemblies in SFR.•Calculation for row bowing was performed with the aid of FADAC code in the present study.•Row bowing was analyzed in detail under different geometric parameters for wrapper tube, even core baffle was taken into consideration.•Reaction forces and deflection parameters were obtained by calculation, which are meaningful for safety evaluation and core structural design.