IPC-Stelle: G21C 7/00 [Version 7 (gültig ab 01.2000)]

SymbolTypTitel
GSKPHYSICS
G21USKNUCLEONICS
G21KLNUCLEAR PHYSICS; NUCLEAR ENGINEERING
G21CUKLNUCLEAR REACTORS (analogue computers therefor G06G 7/54; fusion reactors G21B; nuclear explosives G21J)
G21C 1/00HGRReactors
G21C 1/01UGR1
.General details not provided for in groups G21C 3/00 to G21C 19/00 [3]
G21C 1/02UGR1
.Fast fission reactors, i.e. reactors not using a moderator
G21C 1/03UGR2
. .cooled by a coolant not essentially pressurised, e.g. pool-type reactors [5]
G21C 1/04UGR1
.Thermal reactors
G21C 1/06UGR2
. .Heterogeneous reactors, i.e. in which fuel and moderator are separated
G21C 1/07UGR3
. . .Pebble-bed reactors; Reactors with granular fuel [5]
G21C 1/08UGR3
. . .moderator being highly pressurised, e.g. boiling-water reactor, integral-superheat reactor, pressurised-water reactor (G21C 1/22 takes precedence)
G21C 1/09UGR4
. . . .Pressure regulating arrangements, i.e. pressurisers [5]
G21C 1/10UGR4
. . . .moderator and coolant being different or separated
G21C 1/12UGR5
. . . . .moderator being solid, e.g. Magnox reactor
G21C 1/14UGR3
. . .moderator being substantially not pressurised, e.g. swimming-pool reactor (G21C 1/22 takes precedence)
G21C 1/16UGR4
. . . .moderator and coolant being different or separated, e.g. sodium-graphite reactor
G21C 1/18UGR5
. . . . .coolant being pressurised
G21C 1/20UGR6
. . . . . .moderator being liquid, e.g. pressure-tube reactor
G21C 1/22UGR3
. . .using liquid or gaseous fuel
G21C 1/24UGR2
. .Homogeneous reactors, i.e. in which fuel and moderator present an effectively homogeneous medium to the neutrons
G21C 1/26UGR3
. . .Single-region reactors
G21C 1/28UGR3
. . .Two-region reactors
G21C 1/30UGR1
.Subcritical reactors
G21C 1/32UGR1
.Integral reactors, i.e. reactors wherein parts functionally associated with the reactor but not essential to the reaction, e.g. heat exchangers, are disposed inside the enclosure with the core (G21C 1/02 to G21C 1/30 take precedence) [3]
G21C 3/00HGRReactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements
G21C 3/02UGR1
.Fuel elements
G21C 3/04UGR2
. .Constructional details
G21C 3/06UGR3
. . .Casings; Jackets
G21C 3/07UGR4
. . . .characterised by their material, e.g. alloys [5]
G21C 3/08UGR4
. . . .provided with external means to promote heat-transfer, e.g. fins, baffles, corrugations
G21C 3/10UGR4
. . . .End closures
G21C 3/12UGR4
. . . .Means forming part of the element for locating it within the reactor core; External spacers for this purpose
G21C 3/14UGR4
. . . .Means forming part of the element for inserting it into, or removing it from, the core; Means for coupling adjacent elements
G21C 3/16UGR3
. . .Details of the construction within the casing
G21C 3/17UGR4
. . . .Means for storage or immobilisation of gases in fuel elements [5]
G21C 3/18UGR4
. . . .Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity (interlayers G21C 3/20)
G21C 3/20UGR4
. . . .with coating on fuel or on inside of casing; with non-active interlayer between casing and active material
G21C 3/22UGR2
. .with fissile or breeder material in contact with coolant
G21C 3/24UGR2
. .with fissile or breeder material in fluid form within a non-active casing
G21C 3/26UGR2
. .with fissile or breeder material in powder form within a non-active casing
G21C 3/28UGR2
. .with fissile or breeder material in solid form within a non-active casing
G21C 3/30UGR1
.Assemblies of a number of fuel elements in the form of a rigid unit
G21C 3/32UGR2
. .Bundles of parallel pin-, rod-, or tube-shaped fuel elements
G21C 3/322UGR3
. . .Means to influence the coolant flow through or around the bundles [5]
G21C 3/324UGR3
. . .Coats or envelopes for the bundles [5]
G21C 3/326UGR3
. . .comprising fuel elements of different composition; Comprising, in addition to the fuel elements, other pin-, rod-, or tube-shaped elements, e.g. control rods, grid support rods, fertile rods, poison rods or dummy rods [5]
G21C 3/328UGR4
. . . .Relative disposition of the elements in the bundle lattice [5]
G21C 3/33UGR3
. . .Supporting or hanging of elements in the bundle (spacer grids G21C 3/34); Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles [5]
G21C 3/332UGR4
. . . .Supports for spacer grids [5]
G21C 3/334UGR3
. . .Assembling the bundles [5]
G21C 3/335UGR3
. . .Exchanging elements in irradiated bundles [5]
G21C 3/336UGR3
. . .Spacer elements for fuel rods in the bundle (spacer grids G21C 3/34) [5]
G21C 3/338UGR4
. . . .Helicoidal spacer elements [5]
G21C 3/34UGR3
. . .Spacer grids
G21C 3/344UGR4
. . . .formed of assembled tubular elements [5]
G21C 3/348UGR4
. . . .formed of assembled non-intersecting strips [5]
G21C 3/352UGR4
. . . .formed of assembled intersecting strips [5]
G21C 3/356UGR4
. . . .being provided with fuel element supporting members [5]
G21C 3/36UGR2
. .Assemblies of plate-shaped fuel elements or coaxial tubes
G21C 3/38UGR1
.Fuel units consisting of a single fuel element in a supporting sleeve
G21C 3/40UGR1
.Structural combination of fuel element with thermoelectric element for direct production of electric energy from fission heat (for temperature measurement G21C 17/10)
G21C 3/42UGR1
.Selection of substances for use as reactor fuel
G21C 3/44UGR2
. .Fluid or fluent reactor fuel
G21C 3/46UGR3
. . .Aqueous compositions
G21C 3/48UGR4
. . . .True or colloidal solutions of the active constituent
G21C 3/50UGR4
. . . .Suspensions of the active constituent; Slurries
G21C 3/52UGR3
. . .Liquid metal compositions
G21C 3/54UGR3
. . .Fused salt, oxide, or hydroxide compositions
G21C 3/56UGR3
. . .Gaseous compositions; Suspensions in a gaseous carrier
G21C 3/58UGR2
. .Solid reactor fuel
G21C 3/60UGR3
. . .Metallic fuel; Intermetallic dispersions
G21C 3/62UGR3
. . .Ceramic fuel
G21C 3/64UGR4
. . . .Ceramic dispersion fuel, e.g. cermet
G21C 5/00HGRModerator or core structure; Selection of materials for use as moderator
G21C 5/02UGR1
.Details
G21C 5/04UGR2
. .Spatial arrangements allowing for Wigner growth
G21C 5/06UGR2
. .Means for locating or supporting fuel elements
G21C 5/08UGR2
. .Means for preventing undesired asymmetric expansion of the complete structure
G21C 5/10UGR2
. .Means for supporting the complete structure
G21C 5/12UGR1
.characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator
G21C 5/14UGR1
.characterised by shape
G21C 5/16UGR2
. .Shape of its constituent parts
G21C 5/18UGR1
.characterised by the provision of more than one active zone
G21C 5/20UGR2
. .wherein one zone contains fissile material and another zone contains breeder material
G21C 5/22UGR2
. .wherein one zone is a superheating zone
G21C 7/00HGRControl of nuclear reaction
G21C 7/02UGR1
.by using self-regulating properties of reactor materials (arrangements that involve temperature stability G21C 7/32)
G21C 7/04UGR2
. .of burnable poisons (burnable poisons in fuel rods G21C 3/326) [5]
G21C 7/06UGR1
.by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
G21C 7/08UGR2
. .by displacement of solid control elements, e.g. control rods
G21C 7/10UGR3
. . .Construction of control elements
G21C 7/103UGR4
. . . .Control assemblies containing one or more absorbants as well as other elements, e.g. fuel or moderator elements [5]
G21C 7/107UGR4
. . . .Control elements adapted for pebble-bed reactors [5]
G21C 7/11UGR4
. . . .Deformable control elements, e.g. flexible, telescopic, articulated [5]
G21C 7/113UGR4
. . . .Control elements made of flat elements; Control elements having cruciform cross-section [5]
G21C 7/117UGR4
. . . .Clusters of control rods; Spider construction [5]
G21C 7/12UGR3
. . .Means for moving control elements to desired position (dropping rods in an emergency G21C 9/02)
G21C 7/14UGR4
. . . .Mechanical drive arrangements
G21C 7/16UGR4
. . . .Hydraulic or pneumatic drive arrangements
G21C 7/18UGR3
. . .Means for obtaining differential movement of control elements
G21C 7/20UGR3
. . .Disposition of shock-absorbing devices (shock-absorbers in general F16F)
G21C 7/22UGR2
. .by displacement of a fluid or fluent neutron-absorbing material
G21C 7/24UGR2
. .Selection of substances for use as neutron-absorbing material
G21C 7/26UGR1
.by displacement of the moderator or parts thereof
G21C 7/27UGR2
. .Spectral shift control [5]
G21C 7/28UGR1
.by displacement of the reflector or parts thereof
G21C 7/30UGR1
.by displacement of reactor fuel or fuel elements
G21C 7/32UGR1
.by varying flow of coolant through the core
G21C 7/34UGR1
.by utilisation of a primary neutron source
G21C 7/36UGR1
.Control circuits
G21C 9/00HGREmergency protection arrangements structurally associated with the reactor (emergency cooling arrangements G21C 15/18)
G21C 9/004UGR1
.Pressure suppression [5]
G21C 9/008UGR2
. .by rupture-discs or -diaphragms [5]
G21C 9/012UGR2
. .by thermal accumulation or by steam condensation, e.g. ice condensers [5]
G21C 9/016UGR1
.Core catchers [5]
G21C 9/02UGR1
.Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse
G21C 9/027UGR2
. .by fast movement of a solid, e.g. pebbles [5]
G21C 9/033UGR2
. .by an absorbent fluid [5]
G21C 9/04UGR1
.Means for suppressing fires
G21C 9/06UGR2
. .Means for preventing accumulation of explosives gases, e.g. recombiners [5]
G21C 11/00HGRShielding structurally associated with the reactor
G21C 11/02UGR1
.Biological shielding (in general G21F)
G21C 11/04UGR2
. .on waterborne craft
G21C 11/06UGR1
.Reflecting shields, i.e. for minimising loss of neutrons
G21C 11/08UGR1
.Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield
G21C 13/00HGRPressure vessels; Containment vessels; Containment in general (for chemical or physical processes B01J 3/00; pressure vessels in general F16J 12/00)
G21C 13/02UGR1
.Details
G21C 13/024UGR2
. .Supporting constructions for pressure vessels or containment vessels [5]
G21C 13/028UGR2
. .Seals, e.g. for pressure vessels or containment vessels [5]
G21C 13/032UGR2
. .Joints between tubes and vessel walls, e.g. taking into account thermal stresses [5]
G21C 13/036UGR3
. . .the tube passing through the vessel wall, i.e. continuing on both sides of the wall [5]
G21C 13/04UGR2
. .Arrangements for expansion and contraction
G21C 13/06UGR2
. .Sealing-plugs (for pressure vessels in general F16J 13/00)
G21C 13/067UGR3
. . .for tubes, e.g. standpipes; Locking devices for plugs [5]
G21C 13/073UGR3
. . .Closures for reactor-vessels, e.g. rotatable [5]
G21C 13/08UGR1
.Vessels characterised by the material; Selection of materials for pressure vessels
G21C 13/087UGR2
. .Metallic vessels [5]
G21C 13/093UGR2
. .Concrete vessels [5]
G21C 13/10UGR1
.Means for preventing contamination in event of leakage
G21C 15/00HGRCooling arrangements within the pressure vessel containing the core; Selection of specific coolants
G21C 15/02UGR1
.Arrangement or disposition of passages in which heat is transferred to the coolant, e.g. for coolant circulation through the supports of the fuel elements
G21C 15/04UGR2
. .from fissile or breeder material
G21C 15/06UGR3
. . .in fuel elements
G21C 15/08UGR2
. .from moderating material
G21C 15/10UGR2
. .from reflector or thermal shield
G21C 15/12UGR2
. .from pressure vessel; from containment vessel
G21C 15/14UGR2
. .from ducts conducting a hot fluid; from ducts comprising auxiliary apparatus, e.g. pumps, cameras
G21C 15/16UGR1
.comprising means for separating liquid and steam (separating in general B01D; steam traps F16T)
G21C 15/18UGR1
.Emergency cooling arrangements; Removing shut-down heat
G21C 15/20UGR1
.Partitions or thermal insulation between fuel channel and moderator, e.g. in pressure tube reactors
G21C 15/22UGR1
.Structural association of coolant tubes with headers or other pipes, e.g. in pressure tube reactors (joints of tubes in general F16L) [4]
G21C 15/24UGR1
.Promoting flow of the coolant (electrodynamic pumps H02K 44/02)
G21C 15/243UGR2
. .for liquids [5]
G21C 15/247UGR3
. . .for liquid metals [5]
G21C 15/25UGR3
. . .using jet pumps [5]
G21C 15/253UGR2
. .for gases, e.g. blowers [5]
G21C 15/257UGR2
. .using heat-pipes [5]
G21C 15/26UGR2
. .by convection, e.g. using chimneys, using divergent channels
G21C 15/28UGR1
.Selection of specific coolants (if serving as the moderator G21C 5/12; heat-transfer or heat-exchange materials C09K 5/00)
G21C 17/00HGRMonitoring; Testing (measuring in general G01)
G21C 17/003UGR1
.Remote inspection of vessels, e.g. pressure vessels [5]
G21C 17/007UGR2
. .Inspection of the outer surfaces of vessels [5]
G21C 17/01UGR2
. .Inspection of the inner surfaces of vessels [5]
G21C 17/013UGR2
. .Inspection vehicles [5]
G21C 17/017UGR1
.Inspection or maintenance of pipe-lines or tubes in nuclear installations [5]
G21C 17/02UGR1
.Devices or arrangements for monitoring coolant or moderator
G21C 17/022UGR2
. .for monitoring liquid coolants or moderators [5]
G21C 17/025UGR3
. . .for monitoring liquid metal coolants [5]
G21C 17/028UGR2
. .for monitoring gaseous coolants [5]
G21C 17/032UGR2
. .Reactor-coolant flow measuring or monitoring [5]
G21C 17/035UGR2
. .Moderator- or coolant-level detecting devices [5]
G21C 17/038UGR2
. .Boiling detection in moderator or coolant [5]
G21C 17/04UGR2
. .Detecting burst slugs
G21C 17/06UGR1
.Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination (G21C 17/08 , G21C 17/10 take precedence; detecting leaking fuel elements during reactor operation G21C 17/04)
G21C 17/07UGR2
. .Leak testing [5]
G21C 17/08UGR1
.Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
G21C 17/10UGR1
.Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
G21C 17/104UGR2
. .Measuring reactivity [5]
G21C 17/108UGR2
. .Measuring reactor flux [5]
G21C 17/112UGR2
. .Measuring temperature [5]
G21C 17/116UGR2
. .Passages or insulators, e.g. for electric cables [5]
G21C 17/12UGR2
. .Sensitive element forming part of control element
G21C 17/14UGR1
.Period meters
G21C 19/00HGRArrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel [2]
G21C 19/02UGR1
.Details of handling arrangements
G21C 19/04UGR2
. .Means for controlling flow of coolant over objects being handled; Means for controlling flow of coolant through channel being serviced
G21C 19/06UGR2
. .Means for supporting or storing fuel elements or control elements [4]
G21C 19/07UGR3
. . .Storage racks; Storage pools [5]
G21C 19/08UGR2
. .Means for heating fuel elements before introduction into the core; Means for heating or cooling fuel elements after removal from the core
G21C 19/10UGR2
. .Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements (manipulators B25J)
G21C 19/105UGR3
. . .with grasping or spreading coupling elements [5]
G21C 19/11UGR3
. . .with revolving coupling elements, e.g. socket coupling [5]
G21C 19/115UGR3
. . .with latching devices and ball couplings [5]
G21C 19/12UGR2
. .Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element
G21C 19/14UGR1
.characterised by their adaptation for use with horizontal channels in the reactor core
G21C 19/16UGR1
.Articulated or telescopic chutes or tubes for connection to channels in the reactor core
G21C 19/18UGR1
.Apparatus for bringing fuel elements to the reactor charge area, e.g. from a storage place
G21C 19/19UGR1
.Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements [3]
G21C 19/20UGR1
.Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
G21C 19/22UGR2
. .Arrangements for obtaining access to the interior of a pressure vessel whilst the reactor is operating
G21C 19/24UGR3
. . .by using an auxiliary vessel which is temporarily sealed to the pressure vessel
G21C 19/26UGR1
.Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof
G21C 19/28UGR1
.Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core (pumping coolant G21D)
G21C 19/30UGR2
. .with continuous purification of circulating fluent material, e.g. by extraction of fission products
G21C 19/303UGR3
. . .specially adapted for gases (decontamination of gases G21F 9/02) [5]
G21C 19/307UGR3
. . .specially adapted for liquids (decontamination of liquids G21F 9/04) [5]
G21C 19/31UGR4
. . . .for molten metals [5]
G21C 19/313UGR5
. . . . .using cold traps [5]
G21C 19/317UGR3
. . .Recombination devices for radiolytic dissociation products [5]
G21C 19/32UGR1
.Apparatus for removing radioactive objects or materials from the reactor discharge area, e.g. to a storage place; Apparatus for handling radioactive objects or materials within a storage place or removing them therefrom (disposal of waste material G21F 9/00)
G21C 19/33UGR1
.Apparatus or processes for dismantling strings of spent fuel elements (G21C 19/34 takes precedence) [2]
G21C 19/34UGR1
.Apparatus or processes for dismantling nuclear fuel, e.g. before reprocessing (shielded cells G21F 7/00) [5]
G21C 19/36UGR2
. .Mechanical means only
G21C 19/365UGR3
. . .Removing cannings or casings from fuel [5]
G21C 19/37UGR4
. . . .by separating into pieces both the canning or the casing and the fuel element, e.g. by cutting or shearing [5]
G21C 19/375UGR3
. . .Compacting devices, e.g. for fuel assemblies [5]
G21C 19/38UGR2
. .Chemical means only
G21C 19/40UGR1
.Arrangements for preventing occurrence of critical conditions, e.g. during storage
G21C 19/42UGR1
.Reprocessing of irradiated fuel
G21C 19/44UGR2
. .of irradiated solid fuel
G21C 19/46UGR3
. . .Aqueous processes
G21C 19/48UGR3
. . .Non-aqueous processes
G21C 19/50UGR2
. .of irradiated fluid fuel
G21C 21/00HGRApparatus or processes specially adapted to the manufacture of reactors or parts thereof (in general, section B, e.g. B23)
G21C 21/02UGR1
.Manufacture of fuel elements or breeder elements contained in non-active casings
G21C 21/04UGR2
. .by vibrational compaction or tamping
G21C 21/06UGR2
. .by swaging
G21C 21/08UGR2
. .by a slip-fit cladding process
G21C 21/10UGR2
. .by extrusion, drawing, or stretching
G21C 21/12UGR2
. .by hydrostatic or thermo-pneumatic canning
G21C 21/14UGR2
. .by plating in a fluid
G21C 21/16UGR2
. .by casting or dipping techniques
G21C 21/18UGR1
.Manufacture of control elements covered by group G21C 7/00
G21C 23/00HGRAdaptations of reactors to facilitate experimentation or irradiation [3]