To provide a fast breeder reactor cooling system building capable of securing apparatus integrity of each cooling system chamber and building integrity and maintaining a function as a cooling system by suppressing a tem perature rise of the building and liners, preventing dispersion of Na aerosol, and suppressing moisture discharge and hydrogen generation.
In a cooling system chamber 1B, powdered heat insulating material 31 is injected and filled in a space between a steel liner 3B, a structural concrete floor 04B, and a board shaped heat insulating material 16B. A powder mainly composed of an oxide, a nitride, or a carbide of Al, Mg, Zr, Si, or Ca or a mixture of these, or a powder of at least one material selected from expanded vermiculite, pearlite, obsidian, and pitchstone is used as the powdered heat insulating material 31.
SHIMANO KUNIO
WATANABE HISAO
ABE HIROAKI
OSHIMA IWAO
TOSHIBA CORP
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