To develop a
contaminated water processing device that can shorten the
work time in a
radiation controlled area and minimize the risk of
exposure due to the work.SOLUTION: A method for removing
strontium is developed by inducing
spore formation outside a
radiation controlled area, producing and preserving
bacteria in a
spore-forming process, carrying the
spore-forming
bacteria into the
radiation controlled area, then introducing the spore-forming
bacteria into a tank in which
contaminated water is adjusted to an environment where spore-forming bacteria can survive, and forming spores. Since the work in the radiation controlled area is shorter than before, the risk of
exposure due to the work can be minimized, and the state of the spore-forming bacteria can be easily controlled as well, and thereby bacteria having spore-forming ability can be stably supplied, and high
contamination processing efficiency can be maintained.SELECTED DRAWING: Figure 5