Prestressed-concrete pressure vessel for a nuclear reactor installation having at least one opening closed by a concrete closure head

摘要

In a prestressed-concrete pressure vessel which has an opening (16) closed by a concrete closure head (18), in order to be able to take up and compensate for varying, plane deformations in the closure-head region, the closure head (18) is mounted with the aid of a plane metallic bearing surface (28) of the pressure vessel and a likewise plane metallic supporting surface (30) of the closure head, and is fixed and held down by clamping members (22). To facilitate relative movement or deformation between the closure head and the pressure vessel, a film (42) of a lubricant is inserted between the bearing surface (28) and the supporting surface (30). IMAGE