Ameren officials say the spent fuel will be moved from a pool to underground concrete casks. The center has been working on the storage area for four years.
Ameren officials declined to say how much the dry cask storage project will cost. Shannon Abel, director of engineering projects at the nuclear power plant, said the new storage system will allow the plant to store spent nuclear fuel on site until the plant closes in 2044.
The 48 underground casks have concrete-and-steel lids above the concrete pad at ground level. Each cask can house one canister of spent fuel, which contains 37 fuel assemblies.