Research on core power maximization method of natural circulation lead-bismuth cooled fast reactor

To improve the inherent safety and cost-effectiveness of lead-bismuth cooled fast reactors, SPALLER-100 reactor designed by University South China has been selected as research object to determine maximum power it can produce. This is a multi-objective, complex, multi-dimensional, nonlinear, constrained optimization problem. maintain transportability, material durability, long-term operation stability core ensure under accident conditions, three steady-state limitations are proposed. The platform used calculate neutronic produced at different heights built using Latin hypercube sampling Kriging proxy model. Meanwhile, cooling calculated considering its natural circulation capacity. Finally, design scheme obtained that meets requirements thermal-hydraulic assessments, while producing power. Consequently, during entire life-cycle SPALLER-100, analysis typical scenarios (unprotected loss heat sink, unprotected transient over power, coolant inlet temperature undercooling) performed Quasi-Static Reactivity Balance (QSRB) approach. results show exhibits high accuracy, with safe economical. Overall, this study provide reference ideas for designing reactors maximize output.