Abstract
The pressure of helium is a critical parameter for the helium coolant, and it has a significant impact on the performance of the FW (First Wall)/Blanket. To achieve a deeper understanding of how helium pressure affects the thermo-hydraulic performance of the FW/Blanket, this study examines its influence on both the physical properties of helium coolant and its overall thermo-hydraulic performance. This is achieved using empirical formulas and the fluid dynamics simulation software CFX for a specific FW/Blanket. The results indicate that the pressure of helium has a limited impact on the distribution of temperature. The helium pressure below 8 MPa has a significant impact on the pressure drop and pumping power, while it has a limited effect when the pressure exceeds 12 MPa. Pressures exceeding 12 MPa or falling below 8 MPa should be carefully considered in the design of FW/Blanket. The research results can be used as a reference for the design and optimization of the FW/Blanket.
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