Comparison of Dynamical System Scaling and Hierarchical Two-Tiered Scaling applications with Definite Solution Analogy Theory to the passive residual heat removal system of Fluoride-Salt-cooled high-Temperature Advanced Reactor

The Passive Residual Heat Removal System (PRHRS) of Fluoride-Salt-cooled high-Temperature Advanced Reactor (FuSTAR) has already been designed and scaled by the Hierarchical Two-Tiered Scaling (H2TS).However, considering the difficulties to identify the distortion of the dynamic response, the Dynamical System Scaling(DSS) method was also adopted for comparison in this paper.Firstly, based on the dimensionless governing equations without any common assumptions of the natural cycle process in PRHRS, the Definite Solution Analogy Theory (DSAT) was put forward in this study to calibrate dimensionless numbers based on differential equations.Then the parameters of geometric and thermohydraulics were re-evaluated by the DSS method and compared with those from the H2TS method.The results show that H2TS and DSS are equivalent in experimental design results under the constraint of DSAT.The H2TS method is better at accurately quantifying the deviation item by item, while the DSS method can find the most suitable experimental structure more quickly.