REACTOR TANK COVER AND NUCLEAR REACTOR EQUIPPED WITH SAME.

摘要

Pressure vessel having an outer wall (5), a shell (37) mounted above control bar guide means (39,41), the shell having an upper horizontal plate (45) a lower horizontal plate (43) and hollow members (47) for receiving drive rods (67); the upper plate (45) of the grille forms a sealing plate (83) disposed on the wall (5) of the pressure vessel and closes the upper opening; a reinforcing structure is disposed above the upper plate and comprises a flange (87) disposed near the upper periphery of the sealing plate (83) and spaced-apart reinforcing elements (97) fixed to the flange (87) and cross members (101) extending through and between the reinforcing members (97) while being attached thereto.