Abstract:Based on the introduction of the basic working principle of the heat pipe of the heat pipe reactor, this paper discusses the selection of materials for manufacturing heat pipe and capillary core. Based on a comprehensive discussion of a variety of martensitic heat-resistant steel, austenitic heat-resistant steel, iron nickel base alloy and nickel base alloy that may be used for the manufacture of heat pipes, the author thinks that the candidate materials for heat pipe production in service at 570 OC are 9% Cr martensitic heat-resistant steel and solution strengthened nickel base heat-resistant alloy CCA6117 or Haynes230. However, some special properties should be tested systematically to improve the accumulation of relevant data. For the manufacturing process of candidate materials, appropriate standards should be established. The capillary core can be made of a new porous nickel base alloy with super siphon ability. In this paper, the preparation process of the wick and the expansion method of the wick and the heat pipe are described.