Inspection and repair techniques in reactor vessel of sodium cooled fast reactor, 8-4; Search plan and development of retrieval techniques for loose parts in the experimental fast reactor Joyo, 2

Ashida, Takashi ; Miyamoto, Kazuyuki; Sakata, Hideaki; Ito, Hideaki

In the experimental fast reactor Joyo, Top of wrapper tube of the MARICO-2 test subassembly was bent onto the in-vessel storage rack. The 6 pins to connect Handling head and MARICO-2 rapper tube have become lost parts. Perspective applicable was obtained for confirmed the mechanical impact and search method of the lost part is in the transfer pot filled of sodium by element tests.