Experimental investigation on effective thermal conductivity of powder-packed assembly gaps in heat pipe cooled reactor core

•A solution for contradiction of thermal resistance and contact stress of assembly gaps was put forward.•The effective thermal conductivity of stainless-steel powder packed beds was measured in both air and helium.•Zehner-Schlünder model was calibrated based on the experimental investigation.•Powder...

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Veröffentlicht in:	Nuclear engineering and design 2022-03, Vol.388, p.111611, Article 111611
Hauptverfasser:	Tao, Li, Zhengyu, Du, Hui, He, Xiaoqiang, He, Wenhai, Qu, Jinbiao, Xiong
Format:	Artikel
Sprache:	eng
Schlagworte:	Air temperature Assembly Assembly gap Contact stresses Effective thermal conductivity Experimental data Heat conductivity Heat pipe cooled reactor Heat pipes Heat transfer Helium Nuclear fuel elements Nuclear fuels Nuclear safety Packed beds Pipes Powder Powder packed bed Reactor cores Reactor safety Reactors Safety margins Stainless steels Thermal conductivity Thermal expansion Thermal resistance Zehner-Schlünder model
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