Patent ID: 7668283

Claim:
Pressuriser for a pressurised water nuclear power station, comprising an outer casing which delimits an inner space; a duct which is located away from the casing and extends beneath the casing; a tap which places the inner space of the casing in communication with the duct, this tap having a lower end being welded to the duct by means of a weld seam and an upper end which opens into the inner space; a weld protecting sleeve arranged inside the tap and which has a lower peripheral edge which is engaged in the duct, an annular space selectively filled with a primary liquid being defined radially between the sleeve and the tap and the duct, the sleeve bounding the annular space on the inside, the tap and the duct bounding the annular space on the outside; wherein the duct has inside the lower peripheral edge of the sleeve an inner volume; and wherein the annular space has at least one opening along at least a portion of the lower peripheral edge of the sleeve and is in fluidic communication through the at least one opening with the inner volume of the duct.