[2H10-13] Fusion Material Engineering 1

[2H13] Corrosion effect of solid breeder pebbles on hydrogen isotope permeation behavior of steels and functional ceramic coatings

*WATARU Matsuura¹, AKIYOSHI Suzuki¹, Julia M Leys³, Regina Knitter³, Takumi Chikada¹, Suguru Nakano², Tsuyoshi Hoshino², Jaehwan Kim² (1. Shizuoka University, 2. Quantum Science and Technology, 3. Karlsruher Institut für Technologie)

Keywords:coating, solid breeder, corrosion

In a fusion reactor blanket system, functional coatings have been developed to reduce tritium permeation and corrosion by tritium breeders. Ceramic coatings have been shown high hydrogen isotope permeation reduction performance, while the compatibility of the coating contacting with solid breeder pebbles is unknown. In this presentation, corrosion effects of solid breeder pebbles on hydrogen isotope permeation behavior of steels and the functional coatings are reported through deuterium permeation tests after exposure to the pebbles consisting of lithium metatitanate and lithium orthosilicate.