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Class 376/291 - Concentric tubes or conduits with insulation


Subclass of Class 376 - Induced nuclear reactions: processes, systems, and elements
Definition: Subject matter wherein the means to attenuate thermal radiation
No. of patents: 36
Last issue date: 02/21/1995


NumberTitleIssue Date
5392323Reactor pressure vessel in a nuclear power station
The reactor pressure vessel comprises a pipe socket (2) connected to a feed-water supply line (3), in which is disposed a coaxial protective sleeve (5) (thermal sleeve) which expands with changes in temperature. With its outer end the protective sleeve (5...
02/21/1995
5345480Cooling device which can be fitted onto a remote manipulation arm and its utilization for an operation in a hostile medium at a high temperature
The remote manipulation arm includes rigid sections (12, 14, 16) kept at a temperature adapted to their operation by a device comprising a vessel (37, 38, 39) surrounding each rigid section (12, 14, 16) and connected to a high-pressure coolant gas source....
09/06/1994
5120491Bimetallic thimble tube
A thimble tube for use in a guide the in a nuclear reactor. The thimble tube is an elongated hollow tube having one end closed. The portion of the tube that extends into the reactor is formed from a plurality of sections attached to each other to form the...
06/09/1992
5047201Seal for a vessel connection of a hot pipeline
A hot pipeline is welded to a flange which is supported by brackets connected to a nozzle. The pipeline with a flange can expand freely radially. Welded to the other end of the flange is a pipe, which can withstand an axial temperature gradient between a ...
09/10/1991
4976913Nuclear energy system using pelletized fuel in a boiling liquid reactor
An energy producing system employing nuclear fission of fuel in pellets disposed in a boiling liquid to produce superheated vapors....
12/11/1990
4844274Pressure vessel having a connection stub with a thermal protector
A pressure vessel assembly includes a pressure vessel with a vessel wall having a connection stub with a stub wall. A thermal protector for the connection stub in the form of a first tube extends substantially parallel to the stub wall. The first tube has...
07/04/1989
4808370Connection of a hot gas line to the core barrel of a gas-cooled high-temperature nuclear reactor
A gas-cooled, high-temperature nuclear reactor includes a metallic core barrel, a graphite or carbon block lining disposed in the core barrel, a hot gas line including an outer pressure-confining metallic pipe and a ceramic flow guidance pipe, insulation ...
02/28/1989
4778646Gas cooled high temperature reactor charged with spherical fuel elements
The invention relates to a gas cooled high temperature reactor located in the cavity of a pressure vessel, with spherical fuel elements, and removal apparatus for fuel elements. The latter is made of at least one ceramic pebble outlet tube extending throu...
10/18/1988
4737338Nuclear reactor containing connecting means for connecting a reactor vessel and at least one receiver vessel
Disclosed is a nuclear reactor employing a liquid metal and containing a reactor vessel, and at least one satellite vessel, and a hot and a cold leg connecting means which combine to form a continuous pathway for the flow of the liquid metal between the r...
04/12/1988
4732177Hot gas container with insulation formed of overlapping ceramic bodies
Hot gas container, including a pressure-proof metallic outer shell having an inner surface, thermal insulation covering the inner surface in the form of ceramic bodies each having a given surface, the bodies partially axially overlapping each other over a...
03/22/1988
4713214Device for purifying liquid metal coolant for a fast neutron nuclear reactor
Device for purifying liquid metal coolant for a fast neutron nuclear reactor, comprising a pump (6) for circulating the liquid metal, the metal then being purified and heated after purification, as well as a filter (24) of metallic fibers. It consists of ...
12/15/1987
4676947Device for thermal protection of a component of a fast-neutron nuclear reactor
The invention relates to a device for thermal protection of a component of a fast-neutron nuclear reactor consisting of at least one shell (10, 11) of a diameter smaller than the diameter of the passage (2) for the component (4) but greater than the diame...
06/30/1987
4608101Method for heat treating pipe with double-pipe section
With a metal pipe comprising a double-pipe section connected with a single-pipe section, the double-pipe section in which dead water remains has a lesser degree of heat transfer effect so that it cannot be heated to a steady state. According to the presen...
08/26/1986
4600553Reactor cavity
A reactor cavity surrounding a reactor coolant inlet or outlet pipe is designed to reduce pressurization of the cavity in the event of a LOCA pipe break therein....
07/15/1986
4587082Passage through the wall of a reinforced concrete pressure vessel
A passage through a reinforced concrete pressure vessel is provided, wherein the tolerance ranges required for the fastening of the components in the passage may be produced safely and without excessive expenditures. This is achieved by an arrangement inc...
05/06/1986
4582094Insulation for hot gas piping
A pipeline carrying high-temperature fluids and having an inner conduction pipe, an outer pressure pipe and ceramic insulation disposed between the inner and outer pipes and formed of individual sections being spaced apart defining gaps therebetween, incl...
04/15/1986
4500487Pressure surge attenuator
A pressure surge attenuation system for pipes having a fluted region opposite crushable metal foam. As adapted for nuclear reactor vessels and heads, crushable metal foam is disposed to attenuate pressure surges....
02/19/1985
4492667Fast neutron nuclear reactor
The invention relates to a fast neutron nuclear reactor of the integrated type comprising a cylindrical inner vessel. The inner vessel comprises two concentric ferrules and the connection between the hot collector defined within this vessel and the inlet port ...
01/08/1985
4356147Fluid tight and thermally insulated coupling assembly
A coupling assembly for joining an inlet nozzle with a conduit assembly extending concentrically therein, to provide a fluid-tight and thermally insulated flow passageway for introducing cold water into a nuclear reactor pressure vessel and the like. The ...
10/26/1982
4305429Coupling for two conduits
The present invention relates to a coupling, employing a thermal sleeve, for connecting a secondary conduit to a main conduit. The coupling according to the invention connects a main conduit with a secondary conduit which opens through a lateral opening into t...
12/15/1981
4294472Pipe coupling assembly especially suitable for use in the nuclear reactor
An all metal pipe coupling assembly especially suitable for fluid connecting together certain components submerged within liquid metal in a pool type nuclear reactor is disclosed herein. This coupling assembly which is also submerged within the pool of li...
10/13/1981
4259993Ceramic-insulated pipe for the transport of hot fluids
A ceramic-lined pipe for hot fluids, e.g. gases or liquids from high-tempture nuclear reactors or within such reactors, comprises an outer metal-wall pipe formed internally with a lining of ceramic. The ceramic lining is constituted of a ceramic inner sh...
04/07/1981
4236573High-temperature gas exit from a pre-stressed pressure container
A high-temperature gas exit in the form of a pipe bundle from a pre-stressed cast or concrete pressure container with a first cooling system comprising a sealing skin having cooling pipes arranged on the outside thereof and with a thermal insulation layer...
12/02/1980
4212594Liquid feeding and mixing arrangement including an ejector thermal sleeve
An improved arrangement for feeding a cool liquid into a pressure vessel and mixing the fed liquid with hot vessel-contained liquid includes an ejector thermal sleeve within an inlet nozzle. An upstream portion of the sleeve sealed to the nozzle surrounds...
07/15/1980
4167445Nuclear reactor
A first annular space is formed between a cylindrical baffle and the reactor vessel and a second annular space is formed between the baffle and a counter-baffle. The level of liquid metal coolant is free within the two annular spaces which are separated b...
09/11/1979
4156629Process and apparatus for cooling the wall of the vessel of a fast neutron reactor
Process and apparatus for cooling the wall of the vessel of a fast neutron reactor comprising a main vessel which surrounds a second vessel containing the core and separating a volume of liquid metal contained in the main vessel into two regions called th...
05/29/1979
4155377Hot fluid-conducting pipe assembly
A hot fluid-conducting pipe assembly, comprising an inner metal pipe through which flows a hot fluid, Support pins regularly arranged on and outwardly projecting from the outer surface of the inner metal pipe, Refractory of said coupling members fixed to the i...
05/22/1979
4127444Device for thermal protection of a nuclear reactor vessel
A part of the cold liquid metal which is injected at the base of the reactor core is circulated along the bottom portion of the main reactor vessel and guided by a shell which is concentric with the vessel. A mass of inert gas is trapped within a leak-tig...
11/28/1978
4118276Conduit system for gases of high temperature and high pressure
Disclosed is a high temperature power plant construction, preferably a nuclear power plant, including a plurality of plant components comprising at least one gas-cooled high temperature source, contained in a sealed vessel, and a transport system, connect...
10/03/1978
4116765Liquid metal cooled nuclear reactor
The concrete vault roof of a liquid metal cooled fast reactor is provided with a heat-insulating lining plate and has a central passage for rotating shield plugs surrounded by passages for heat exchangers and pumps. An annular plate of relatively small th...
09/26/1978
4087325Nuclear reactor
Integrated nuclear reactor cooled by a liquid metal and constituted by a n tank, which contains a central inner tank containing the core and the hot liquid metal, this inner tank being connected to individual cylindrical chambers each containing a heat e...
05/02/1978
4056438Liquid sodium cooled fast reactor
A set of cylindrical shells is interposed between the main vessel wall of an integrated sodium-cooled fast reactor and the primary core containment vessel so as to form a siphon having two downwardly directed branches. One branch opens into the intervesse...
11/01/1977
4047742Pipe connection for compensation of thermal motion
Joints for high temperature and high pressure conduits are disclosed wherein two conduit members are joined in such a manner that permits axial and radial movement due to temperature variations therein while at the same time provides sealing of the joints...
09/13/1977
4046629Nuclear reactors
Thermal insulation for a core tank of a fast breeder nuclear reactor comprises a plurality of spaced membranes defining a series of concentric chambers lining the tank. Liquid metal is pumped from the cooler regions of a pool of coolant into the first cha...
09/06/1977
4032399Integrated fast reactor of the liquid metal cooled type
A cooling circuit for the main reactor vessel is limited on one side by the main vessel and a flow-reversing baffle shell and on the other side by the flow-reversing baffle shell and a counter-baffle shell which surrounds the primary vessel. The cooling c...
06/28/1977
3981689Insulator
Readily installable, highly efficient insulating structures for affixation to bodies requiring insulation comprise successive sheets of closely spaced heat resistive metal foil configured to maintain the intersheet spacing under the stress of gravity and ...
09/21/1976
 
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