Abstract: A vessel includes an outer wall and an inner wall arranged at a distance therefrom within the vessel and leaving an annular space relative to the outer wall. The inner wall is supported on the outer wall so as to allow for relative movements. In order to provide a vessel with which the danger of oscillations of the inner wall is avoided, with which a simple supply of medium is possible, which is easy to clean and with which the danger of an implosion of the inner wall is reduced, the inner wall is comprised of individual annular sections subsequently arranged in an axial direction of the vessel. Each section is supported on the outer wall independently of the other sections. An expansion joint is provided between two neighboring annular sections each.

Abstract: A pressure vessel for a nuclear reactor comprises a reinforced concrete vessel with at least one open area located in the wall of the concrete vessel, a lining means anchored on the inside surface of the concrete vessel and the opea area for protection of the surfaces and at least one expansion space in the concrete vessel immediately adjacent the lining means to permit movement of the lining means and distribution of the stresses in the lining means under various reactor conditions.

Abstract: A pressure vessel susceptible to high temperatures, especially for containment of a nuclear-reactor core, is constituted of a cylindrical shell from a cast material such as cast steel, cast iron or concrete, and is prestressed by vertical cables which extend parallel to generatrices of the shell. Peripheral (circumferential) prestressing cables are provided around the shell which can be externally insulated. The peripheral tensioning cables are exposed externally of the insulation material and bear upon the shell of the vessel with heat-resistant elements of high compressive strength which extend through the external insulation.