Siemens Aktiengesellschaft

Framatome Anp Gmbh

Kraftwerk Union Aktiengesellschaft

Areva Np Gmbh

Hermann-Josef Conrads

Erwin Laurer

J&uuml;rgen Model

Rainer Schilling

Jurgen Model

Ullrich Preiss

Pius Mackert

Werner Leidemann

Karl F&auml;ser

Michael Seiter

Rafael Mandl

Horst Goggelmann

Jurgen Czech

Paul Uyttendaele

Juergen Model

Walter Merklein

Bernd Staehle

Wilfried Stoll

Klaus Dubiel

Karl-Heinz Richter

The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of control parts. The control parts are connected in series in the control line of the fitting and are each actuated by a control valve. The control parts open the fitting only when all the control parts are in a position which opens the fitting. The fitting closes as soon as even only one of the control parts is in a position which closes the fitting.

Assembly having a spring-loaded tandem control valve

The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of pilot parts. The pilot parts are connected in series in the control line of the fitting and are each actuated by a pilot valve. The pilot parts open the fitting only when all the pilot parts are in a position which opens the fitting. The fitting closes as soon as even only one of the pilot parts is in a position which closes the fitting.

Spring-loaded tandem control valve

A control device includes a pressure-displacement transducer for triggering a control part for activating a safety valve of a pressure vessel. A space in the pressure-displacement transducer can be connected to a blow-off tank through a drainage line. A first embodiment includes a switchover valve device which is associated with the drainage line and connects the space to a take-off line instead of to the blow-off tank when the pressure in the blow-off tank is above a limiting pressure. A second embodiment includes a hydraulic compensating system which exerts a first force on the pressure-displacement transducer, from a pressure in the blow-off tank. That force counteracts a second force produced in the space by that pressure and in particular compensates for that force.

Pilot device for a safety valve

A pressurizer includes a casing in which at least one spray line ends. The spray line is guided through a wall in a lower region of the casing and is disposed in such a way as to run upward inside the casing. The spray line ends at its geodetically highest point.

Spray lines for a pressurizer of a pressured water reactor

A valve includes a device for shutting off a valve interior. The shutoff device is positioned by a piston which is guided in a cylinder and forms a first chamber and a second chamber in the cylinder. The second chamber communicates with the valve interior through a throttle path, so that the shutoff device is movable in a damped manner in both closing and opening directions.

Damped valve

Pressure fitting, in particular a pressure relief and safety valve

A steam power station, in particular a nuclear power station, includes a steam conduit leading through a wall and forming a fixed point with the wall for the introduction of forces and moments. A main valve is connected to the steam conduit at the fixed point, without a high-pressure pipe being interposed. Satellite valves, which have smaller nominal widths than the main valve, are fastened to the housing of the main valve, without a high-pressure pipe being interposed. At least one additional valve has a housing fastened to the housing of a satellite valve, without a high-pressure pipe being interposed and without any support.

Steam power station

An apparatus for securing a pressure vessel against over pressure includes a shaped part connected to a pressure vessel and a valve assembly being disposed on the shaped part. The valve assembly includes a housing block, at least one safety valve having a valve seat disposed in the housing block, a hydraulic seal for the safety valve, and a conduit being disposed inside the housing block and/or the shaped part for receiving the hydraulic seal.

Apparatus for securing a pressure vessel against over pressure

A pressurized water reactor residual heat extraction system uses the secondary cooling circuit to extract the residual heat in certain operating and malfunction conditions. A steam generator (D1) has a connection, located on the live-steam and feed-water side, to the secondary circuit side of a safety condenser (SK1). The tertiary circuit side of the safety condenser is fed from a water reservoir (B) located at a physically higher level. The steam generated is vented to the atmosphere through a blow-off line (b2) which may include a separator. A make-up feed device (E1) is connected to the secondary side of the steam generator. Because of the higher location of the safety condenser with respect to the steam generator, the heat energy in the secondary cooling circuit circulates by natural circulation.

Secondary-side residual-heat removal system for pressurized-water

Pressurized water reactor with a primary circuit including therein a reactor pressure vessel, a steam generator and a main coolant pump, and with an auxiliary system having high pressure pumps for feeding water into the primary circuit, including a line extending from an upper side of the pressure vessel and having at least one shut-off valve therein, the line connecting the reactor pressure vessel and a part of the auxiliary system wherein a lower pressure prevails than in the reactor pressure vessel.

Growing community of inventors

Herzogenaurach, Germany

Hermann-Josef Conrads