| 摘要 |
Pressuriser for a pressurised water nuclear power station, comprising an outer casing which delimits an inner space; a duct ( 11 ) which extends beneath the casing and which is capable of being tapped from the coolant system of the nuclear power station; a tap ( 18 ) which places the inner space of the casing in communication with the duct ( 11 ), this tap ( 18 ) being welded to the duct ( 11 ) by means of a weld seam ( 32 ); a sleeve ( 42 ) for protecting the weld seam ( 32 ), which sleeve is arranged inside the tap ( 18 ) and which has a lower peripheral edge ( 46 ) which is engaged in the duct ( 11 ), the sleeve ( 42 ) defining with the tap ( 18 ) and the duct ( 11 ) an annular space ( 74 ) which is capable of being filled with the primary liquid; wherein the annular space ( 74 ) is open along at least a portion of the lower peripheral edge ( 46 ) of the sleeve ( 42 ) and opens inside the duct ( 11 ).
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