Pressurizer for a nuclear power plant with a pressurised water reactor

摘要

A pressurizer comprises an outer shell with a duct (11) extending below it and a branch (18) linking the shell's interior to the duct via a weld (32) protected by an inner sleeve (42) with an annular gap (74) between the shell and sleeve that can be filled with the primary fluid. The inner sleeve is open along at least part of its lower peripheral edge (46). The upper end (48) of the sleeve is joined to a ring (38) that is fixed rigidly to the interior of the shell round an inner duct.