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Report No.
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Wetting of metallic plated stainless steels by liquid metal sodium

Kawaguchi, Munemichi; Hamada, Hirotsugu

Since liquid sodium is used as a coolant of sodium-cooled fast breeder reactors, the optical visual inspection in the inner of the reactor is difficult. Then, Japan Atomic Energy Agency has developed the under sodium viewer (USV) for the purpose of visually inspecting, and it is important to understand the wetting mechanism between the liquid sodium and USV sensor surface. In order to improve the wettability, Au plating is used in the surface of USV sensor at the present. In this study, some various plating specimens including Au plating were manufactured, and their wettability by liquid sodium were measured experimentally. In the result, we confirmed that solubility of the plating is important parameter for the plating processing on the sodium wetting.

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