Kraftwerk Union Aktiengesellschaft

Siemens Aktiengesellschaft

Grunzweig & Hartmann Montage Gmbh

Grunzweig and Hartmann Und Glasfaser Ag

Manfred Scholz

Wolfgang-Peter Fricker

Bernd Gollasch

Eberhard Michel

Dietmar Bittermann

Wolfgang Kohler

Horst Weisshaupl

Heinrich Dorner

Axel Jungmann

Sieghard Hellmann

Andreas Gobel

Jurgen Scharl

Helmut Wagner

Ulrich Fischer

Kuno Leyendecker

Peter Fricker

Heinrich Bauche

Jurgen Eyink

Wolfgang Berndt

Peter Katscher

Walter Korn

Josef Artnik

Hermann Plank

Horst Wunsch

A nuclear reactor installation includes a reactor pressure vessel and a reactor core in the reactor pressure vessel. A supporting and protective structure supporting the reactor pressure vessel and surrounding the reactor pressure vessel on the bottom and laterally, has a bottom region and a circumferential wall. A core catcher device for the reactor core has a collecting basin for a core melt being installed below the reactor pressure vessel. The collecting basin has a bottom wall and a jacket wall being respectively separated from the bottom region and the circumferential wall of the supporting and protective structure by a spacing gap. Cooling channels are disposed in the spacing gap at the bottom wall and the jacket wall for exterior cooling of the collecting basin with a cooling liquid. Turbulence bodies are disposed in a surface region of the bottom wall for generating a turbulent flow of the cooling liquid flowing from the inside to the outside over the bottom wall toward the jacket wall. There is also a method for starting and maintaining exterior cooling of a core catcher device of a nuclear reactor installation.

Nuclear reactor installation with a core catcher device and method for

A nuclear power plant includes a concrete biological shield, a metallic reactor pressure vessel surrounded by the concrete biological shield, coolant connector pieces connected to the reactor pressure vessel, coolant lines connected to the coolant connector piece, and a support engaging the coolant connector pieces and holding the reactor pressure vessel. The support includes at least one supporting tube surrounding one of the coolant connector pieces, the supporting tube having an inner surface anchored on the one coolant connector piece and an outer surface anchored on the biological shield.

Nuclear power plant having a metallic reactor pressure vessel

All-metal heat insulation, including building blocks which can be joined together, the building blocks each including metallic foils being thermally movably supported and mutually spaced apart from each other forming insulating cells therebetween, spacer strips for maintaining the mutual spacing between the foils, and at least two housing plates at least partly surrounding the foils and spacer strips and being disposed at a given distance from each other, the spacer strips being adjacent to each other and being fastened to at least one of the housing plates, the spacer strips being mutually spaced apart from each other at a distance at least equal to the thickness of one foil forming receiving pockets for the foils at least at one of the plates, the foils being shorter than the given distance between the housing plates and being slideably fitted in the receiving pockets.

All-metallic heat insulation, formed of heat insulating building blocks

Heat retarding closure system for partitions having pressure relief openings formed therein especially in nuclear reactor buildings where main coolant nozzles of a reactor pressure vessel penetrate a biological shield, including lightweight construction closure elements having a side facing the reactor and anchors for holding the closure elements, the closure elements being pushable out of the anchors by an overpressure in a given pressure difference direction on the reactor side, and an outer sealing blowout skin, the closure elements being in the form of heat-retarding cassette inserts having a front surface with a peripheral shearing edge formed thereon resting against the blowout skin, and the blowout skin having a given thickness in the given pressure difference direction enabling the cassette insert to shear off the blowout skin and be pushed out of the anchors when a given pressure difference is at least reached.

Heat-retarding closure system for pressure relief openings of

Heat insulation for domeshaped bottom and/or cover regions of a pressure vessel, the heat insulation being penetrated by a multiplicity of pressure vessel unions extending parallel to the axis of the pressure vessel, including an integral dome formed of heat insulation having a passage formed therein for each of the pressure vessel unions, guide elements extending parallel to the axis of the pressure vessel for centering the heat-insulation dome with respect to the pressure vessel and for axially movably mounting the heat-insulation dome so that it can be lowered from a largely convection-proof operating position thereof to a storage position thereof onto an assembly platform, whereby the union passages of the pressure vessel are exposed for in-service testing, and can be raised back to the operating position thereof.

Heat insulation for dome-shaped bottom and/or cover region of a pressure

Heat insulating casing for structural components having curved surfaces, including insulating plates formed of compressed material based on pyrogenic silica, reinforcement fibers and on an opacifier, the insulating plates being divided into insulating elements having trapezoidal cross sections, and the insulating elements being combined to form a polygonal insulating shell.

Heat insulating casing

Heat-insulation building block of all-metal construction variable in size and having mutually spaced thermally displaceably mounted metallic insulation foils defining insulation cells therebetween together with spacer elements holding the insulation foils at a distance from one another, as well as metal housing sheets carrying and at least partly enclosing the insulation foils and the spacer elements, including at least two building block parts nested within one another with the metal housing sheets and the insulation foils thereof having a mutual convection-inhibiting sliding fit and, in sliding direction of the mutual sliding fit, the adjacently disposed insulation foils and metal housing sheets having respective overlap lengths greater than a predetermined maximum enlargement of the building block resulting from sliding apart of the building block parts in the sliding direction.

Heat-insulation building block of all-metal construction

Metal-foil insulation formed of a multiplicity of substantially rectangular-shaped, air-enclosing metal foils disposed laterally adjacent and above one another and provided with spacers therebetween, the metal foils being packageable in thermally displaceable relationship into panels with connecting means for maintaining the foil in packaged condition, the panels, in turn being mutually alignable with sealable joints in a plurality of coordinate directions, includes bends formed in marginal zones of at least one side of an upper and a lower side of the metal foils in the respective panels, the bends having a shape and a shape elasticity such as to be deformable by a packaging force to a spacing between mutually adjacent metal foils determined by the spacers therebetween, the metal foils packaged into the respective panels being disposed with the bends thereof substantially linearly and sealingly engaging one another.

Metal foil insulation, especially for nuclear reactor installations

Lifting device for a horizontally seated cover of a nuclear-reactor pressure vessel includes a traverse having means for holding a cover to be lifted and having a substantially central point of application for a lifting tool, and means for compensating for deviations from the horizontal of the cover held by the traverse, the compensating means including a pair of mutually connected eccentrics cooperable for adjusting the point of application on the traverse in a horizontal plane.

Lifting device

The invention concerns a motor-driven screwing and transporting tool for tightening or loosening the threaded studs and associated tightening nuts of the head bolting of pressure vessels. After the tightening nuts are loosened or before they are tightened, the weight of the studs is taken over by rotating bearings that can be lifted, so that the studs with their tightening nuts can be screwed in or out, the screw threads of the studs being thus weight-relieved. The invention is intended primarily for nuclear reactor pressure vessels.

Motor-driven screwing and transporting tool for reactor pressure vessel

A nuclear reactor installation includes a pressurized-water reactor pressure vessel positioned in a reinforced-concrete structure forming a wall surrounding the pressure vessel and forming an annular space around the pressure vessel, this space containing a layer of discrete elements such as gravel, ceramic bodies, steel balls, etc. This layer directly contacts the concrete wall, possibly through a steel sheet or plate skin and between it and the pressure vessel, a thermally-insulating and pressure-resistant encasement is built from separable segments cast from suitable concrete, a steel sheet or plate skin preferably being interposed between the layer of discrete elements and this encasement, the discrete elements being compacted so that radial force transmitted from the pressure vessel via the encasement is transmitted through the discrete elements to the concrete wall formed by the reinforced-concrete structure. The encasement, layer and skin interposed between them provide via their total thickness, for zero-travel restraint of the pressure vessel in its radial direction, via the concrete structure's wall, when these parts and the pressure vessel are thermally expanded during operation of the reactor. When the reactor is shut down and it and the various parts are cold, the layer of discrete particles and the skin between them and the encasement, are proportioned so that with thermal contraction the skin is free from the encasement, and the latter, being made of separable segments, may be removed segment-by-segment.

Nuclear reactor installation

A nuclear reactor pressure vessel is installed in the pit of a biological shield forming a concrete wall surrounding the vessel and which defines an annular space around the vessel. A heat insulating layer of concrete surrounds the vessel within the annular space and partially fills the latter, and between the insulation and the concrete wall, steam I or H beams are vertically positioned with their flanges engaging the heat insulating layer and the concrete wall so as to support the heat insulating layer against radial motion when the pressure vessel thermally expands radially, thereby providing the latter with rupture protection. The steel beams are circumferentially interspaced very closely together and possibly with their flange edges abutting, thus forming a large number of vertically extending coolant flow passages which are open at the tops of the vertical beams around the periphery at the top of the vessel, and which are interconnected by an annular manifold at their bottom ends so that a coolant under pressure can be introduced for upward flow, thus protecting the concrete wall from excessive thermal stressing.

Growing community of inventors

Erlangen, Germany

Manfred Scholz