The object of this invention is to provide a fiber-reinforced concrete
cask that ensures easy working, enables reducing working cost, excels in
strength, durability and heat resistance and enables minimizing cracking;
a process for fabrication of the same; and a supporting frame for molding
the concrete cask. In particular, concrete cask (10) formed through
injecting and solidification of concrete (11) is characterized in that
sheets of reinforcement fibers having a thermal expansion coefficient
equal to or lower than that of concrete (11) are provided on at least the
outer circumferential surface and the inner circumferential surface of
the concrete cask (10) and that the inner circumferential surface of
outer sheet (21) and the outer circumferential surface of inner sheet
(22) are connected with each other by strings of reinforcement fibers
(23). Preferably, carbon fibers are used as the reinforcement fibers.