PRESSURE WATER REACTOR

摘要

The pressurized water reactor according to the embodiment comprises: a cylindrical reactor pressure vessel (1) to which inlet nozzles are connected; fuel assemblies which are contained within the reactor pressure vessel (1); a cylindrical reactor core barrel (3) which surrounds the fuel assemblies and forms an annular downcomer (6) between the reactor core barrel (3) and the inner surface of the reactor pressure vessel (1); and radial supports. The radial supports are supports which are arranged below the downcomer (6) at intervals in the circumferential direction, respectively have vertical flow paths formed therein, and position the reactor core barrel (3) and the reactor pressure vessel (1). The radial supports comprise, for example, flow path-equipped radial keys (21) and key groove members (40).