A nuclear energy plant with a closed circuit for the working gas, in which nuclear reactor operable to heat up the working gas, is through a plurality of gas conduits arranged in parallel, connected to a plurality of turbo-sets for generating electric energy and to circuit components following the turbo-sets. One turbo-set each and the respective circuit components associated therewith are respectively arranged in common structural units which are radially arranged around the nuclear reactor. Each of the structural units comprises a first connection for a hot gas conduit withdrawing the heated working gas from the reactor and a second connection for a cold gas conduit for conveying the working gas to the nuclear reactor after the working gas has passed through the respective circuit components.