| Outline |
Indent Level
| |
| Color | Curly Brackets (indicating CPC extensions to IPC) | |
CPC | COOPERATIVE PATENT CLASSIFICATION | |||
 | NUCLEAR REACTORS (analogue computers therefor G06G 7/54; fusion reactors, hybrid fission-fusion reactors G21B; nuclear explosives G21J) WARNING -
|
| Reactors |
| G21C 1/02 | . | Fast fission reactors, i.e. reactors not using a moderator; { Metal cooled reactors; Fast breeders} |
| G21C 1/022 | . . | { Characterised by the concept and properties of the core} |
G21C 1/024 | . . . | { where the core is divided in zones with fuel and zones with breeding material} |
G21C 1/026 | . . . | { Reactors not needing refueling, i.e. reactors of the type breed-and-burn, e.g. travelling or deflagration wave reactors or seed-blanket reactors} |
G21C 1/028 | . . |
G21C 1/03 | . . | cooled by a coolant not essentially pressurised, e.g. pool-type reactors |
| G21C 1/04 | . | Thermal reactors; { Epithermal reactors} |
| G21C 1/06 | . . | Heterogeneous reactors, i.e. in which fuel and moderator are separated |
G21C 1/07 | . . . | Pebble-bed reactors; Reactors with granular fuel |
| G21C 1/08 | . . . | moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor (G21C 1/22 takes precedence) |
G21C 1/082 | . . . . | { Reactors where the coolant is overheated} |
G21C 1/084 | . . . . | { Boiling water reactors} |
G21C 1/086 | . . . . | { Pressurised water reactors} |
G21C 1/09 | . . . . | Pressure regulating arrangements, i.e. pressurisers |
| G21C 1/10 | . . . . | moderator and coolant being different or separated |
| G21C 1/14 | . . . | moderator being substantially not pressurised, e.g. swimming-pool reactor (G21C 1/22 takes precedence) |
| G21C 1/16 | . . . . | moderator and coolant being different or separated, e.g. sodium-graphite reactor { sodium-heavy water reactor, organic coolant-heavy water reactor} |
G21C 1/22 | . . . | using liquid or gaseous fuel |
| G21C 1/24 | . . | Homogeneous reactors, i.e. in which the fuel and moderator present an effectively homogeneous medium to the neutrons |
| G21C 1/30 | . | Subcritical reactors; { Experimental reactors with exception of swimming-pool reactors or zero-energy reactors} |
G21C 1/303 | . . | { Experimental and irradiation arrangements inside the reactor (irradiation loops G21C 1/306; material testing by neutrons G01N 23/005)} |
G21C 1/306 | . . | { Irradiation loops} |
| G21C 1/32 | . |
| Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements |
| G21C 3/02 | . |
| . . | Constructional details |
G21C 3/041 | . . . | { Means for removal of gases from fuel elements} |
G21C 3/042 | . . . | { Fuel elements comprising casings with a mass of granular fuel with coolant passages through them} |
G21C 3/044 | . . . | { Fuel elements with porous or capillary structure} |
| G21C 3/06 | . . . | Casings; Jackets |
G21C 3/07 | . . . . | characterised by their material, e.g. alloys |
G21C 3/08 | . . . . | provided with external means to promote heat-transfer, e.g. fins, baffles |
| G21C 3/10 | . . . . | End closures; { Means for tight mounting therefor} |
G21C 3/12 | . . . . | Means forming part of the element for locating it within the reactor core { means not forming part of the element G21C 5/06} |
G21C 3/14 | . . . . | Means forming part of the element for inserting it into, or removing it from, the core; Means for coupling adjacent elements, { e.g. to form a stringer} |
| G21C 3/16 | . . . | Details of the construction within the casing |
G21C 3/17 | . . . . | Means for storage or immobilisation of gases in fuel elements |
G21C 3/18 | . . . . | 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 3/20 | . . . . | with coating on fuel or on inside of casing; with non-active interlayer between casing and active material { with multiple casings or multiple active layers} |
G21C 3/22 | . . | with fissile or breeder material in contact with coolant |
G21C 3/24 | . . | with fissile or breeder material in fluid form within a non-active casing |
G21C 3/26 | . . | with fissile or breeder material in powder form within a non-active casing |
G21C 3/28 | . . | with fissile or breeder material in solid form within a non-active casing |
| G21C 3/30 | . | Assemblies of a number of fuel elements in the form of a rigid unit |
| G21C 3/32 | . . | Bundles of parallel pin-, rod-, or tube-shaped fuel elements |
G21C 3/3206 | . . . | { Means associated with the fuel bundle for filtering the coolant, e.g. nozzles, grids} |
G21C 3/3213 | . . . |
G21C 3/322 | . . . | Means to influence the coolant flow through or around the bundles |
| G21C 3/324 | . . . | Coats or envelopes for the bundles |
| G21C 3/33 | . . . | 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 |
G21C 3/3305 | . . . . | { Lower nozzle} |
G21C 3/331 | . . . . | { Comprising hold-down means, e.g. springs} |
G21C 3/3315 | . . . . | { Upper nozzle} |
G21C 3/332 | . . . . | Supports for spacer grids |
G21C 3/334 | . . . | Assembling { , maintenance or repair of} the bundles { (assembling, maintenance or repair of other reactor components G21C 19/207)} |
G21C 3/335 | . . . | Exchanging elements in irradiated bundles |
| G21C 3/336 | . . . | Spacer elements for fuel rods in the bundle (spacer grids G21C 3/34) |
| G21C 3/34 | . . . | Spacer grids |
G21C 3/3408 | . . . . | { Compact spacer grids, e.g. made of a plate or a blade} |
G21C 3/3416 | . . . . | { Spacer grids formed by metallic wires, e.g. springs} |
G21C 3/3424 | . . . . | { Fabrication of spacer grids} |
G21C 3/344 | . . . . | formed of assembled tubular elements |
G21C 3/348 | . . . . | formed of assembled non-intersecting strips |
G21C 3/352 | . . . . | formed of assembled intersecting strips |
| G21C 3/356 | . . . . | being provided with fuel element supporting members |
G21C 3/36 | . . | Assemblies of plate-shaped fuel elements or coaxial tubes |
G21C 3/38 | . | Fuel units consisting of a single fuel element in a supporting sleeve { or in another supporting element} |
G21C 3/40 | . | Structural combination of fuel element with thermoelectric element for direct production of electric energy from fission heat (for temperature measurement G21C 17/10) { or with another arrangement for direct production of electric energy, e.g. a thermionic device (combination with thermoelements for temperature measurements G21C 17/102)} |
| . | Selection of substances for use as reactor fuel |
| G21C 3/44 | . . | Fluid or fluent reactor fuel |
| G21C 3/46 | . . . | Aqueous compositions |
G21C 3/48 | . . . . | True or colloidal solutions of the active constituent |
G21C 3/50 | . . . . | Suspensions of the active constituent; Slurries |
G21C 3/52 | . . . | Liquid metal compositions |
G21C 3/54 | . . . | Fused salt, oxide or hydroxide compositions |
G21C 3/56 | . . . | Gaseous compositions; Suspensions in a gaseous carrier |
| G21C 3/58 | . . | Solid reactor fuel { Pellets made of fissile material} |
| Moderator or core structure; Selection of materials for use as moderator |
| G21C 5/02 | . | Details |
G21C 5/04 | . . | Spatial arrangements allowing for Wigner growth |
G21C 5/06 | . . |
G21C 5/08 | . . | Means for preventing undesired asymmetric expansion of the complete structure; { Stretching devices, pins} |
G21C 5/10 | . . | Means for supporting the complete structure { (arrangements for supporting vessels and core-structures G21C 13/024)} |
| G21C 5/12 | . | characterised by composition, e.g. the moderator containing additional substances which ensure improved heat resistance of the moderator { (purification of fluid moderators during the operation of the reactor G21C 19/30)} |
G21C 5/123 | . . | { Moderators made of organic materials} |
G21C 5/126 | . . | { Carbonic moderators (carbon and graphite in general C01B 31/00; refractory carbon-bulbs C04B 35/00; carbon electrodes C25B)} |
| G21C 5/14 | . | characterised by shape |
| G21C 5/18 | . | characterised by the provision of more than one active zone |
| Control of nuclear reaction |
G21C 7/005 | . | { Flux flattening} |
| G21C 7/02 | . | by using self-regulating properties of reactor materials, { e.g. Doppler effect} (arrangements that involve temperature stability G21C 7/32) |
G21C 7/04 | . . | of burnable poisons (burnable poisons in fuel rods G21C 3/326) |
| G21C 7/06 | . | by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section |
| G21C 7/08 | . . | by displacement of solid control elements, e.g. control rods |
| G21C 7/10 | . . . | Construction of control elements |
G21C 7/103 | . . . . | Control assemblies containing one or more absorbants as well as other elements, e.g. fuel or moderator elements |
G21C 7/107 | . . . . | Control elements adapted for pebble-bed reactors |
G21C 7/11 | . . . . | Deformable control elements, e.g. flexible, telescopic, articulated |
G21C 7/113 | . . . . | Control elements made of flat elements; Control elements having cruciform cross-section |
G21C 7/117 | . . . . | Clusters of control rods; Spider construction |
| G21C 7/12 | . . . | Means for moving control elements to desired position (dropping rods in an emergency G21C 9/02) |
G21C 7/18 | . . . | Means for obtaining differential movement of control elements |
G21C 7/20 | . . . |
G21C 7/22 | . . | by displacement of a fluid or fluent neutron-absorbing material, { e.g. by adding neutron-absorbing material to the coolant} |
G21C 7/24 | . . | Selection of substances for use as neutron-absorbing material |
| G21C 7/26 | . | by displacement of the moderator or parts thereof { by changing the moderator concentration} |
G21C 7/28 | . | by displacement of the reflector or parts thereof |
G21C 7/30 | . | by displacement of the reactor fuel or fuel elements |
G21C 7/32 | . | by varying flow of coolant through the core { by adjusting the coolant or moderator temperature} |
G21C 7/34 | . | by utilisation of a primary neutron source |
G21C 7/36 | . | Control circuits |
| Emergency protection arrangements structurally associated with the reactor { e.g. safety valves provided with pressure equalisation devices} (emergency cooling arrangements G21C 15/18) |
G21C 9/001 | . | { against explosions e.g. blast shields} |
G21C 9/002 | . | { against Na- or Ka- reactions} |
| G21C 9/004 | . | Pressure suppression |
G21C 9/008 | . . | by rupture-discs or -diaphragms |
G21C 9/012 | . . | by thermal accumulation or by steam condensation, e.g. ice condensers |
G21C 9/016 | . | Core catchers |
| G21C 9/02 | . | Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; { Control elements having arrangements activated in an emergency} (control elements per se G21C 7/00) |
G21C 9/022 | . . | { Reactor fuses} |
G21C 9/024 | . . | { Rupture diaphragms} |
G21C 9/027 | . . | by fast movement of a solid, e.g. pebbles |
G21C 9/033 | . . | by an absorbent fluid |
| G21C 9/04 | . | Means for suppressing fires { Earthquake protection} |
| Shielding structurally associated with the reactor |
| G21C 11/02 | . |
| G21C 11/022 | . . | { inside the reactor vessel} |
G21C 11/026 | . . | { in apertures or channels through a wall} |
G21C 11/028 | . . | { characterised by the form or by the material} |
G21C 11/04 | . . | on waterborne craft |
G21C 11/06 | . | Reflecting shields, i.e. for minimising loss of neutrons |
| G21C 11/08 | . | Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield { Thermal insulation} |
G21C 11/081 | . . | { consisting of a non-metallic layer of insulating material} |
| G21C 11/083 | . . | { consisting of one or more metallic layers} |
G21C 11/086 | . . | { consisting of a combination of non-metallic and metallic layers, e.g. metal-sand-metal-concrete} |
G21C 11/088 | . . | { consisting of a stagnant or a circulating fluid} |
| Pressure vessels; Containment vessels; Containment in general (for chemical or physical processes B01J 3/00; pressure vessels in general F16J 12/00) |
| G21C 13/02 | . | Details |
G21C 13/022 | . . | { Ventilating arrangements} |
G21C 13/024 | . . | Supporting constructions for pressure vessels or containment vessels |
| G21C 13/028 | . . | Seals, e.g. for pressure vessels or containment vessels |
| G21C 13/032 | . . | Joints between tubes and vessel walls, e.g. taking into account thermal stresses |
G21C 13/036 | . . . | the tube passing through the vessel wall, i.e. continuing on both sides of the wall |
G21C 13/04 | . . | Arrangements for expansion and contraction |
| G21C 13/06 | . . | Sealing-plugs (for pressure vessels in general F16J 13/00) |
| G21C 13/08 | . | Vessels characterised by the material; Selection of materials for pressure vessels |
G21C 13/10 | . | Means for preventing contamination in the event of leakage, { e.g. double wall} |
| Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants |
| G21C 15/02 | . | Arrangements or disposition of passages in which heat is transferred to the coolant; { Coolant flow control devices (G21C 19/04 takes precedence; coolant flow control through fuel assemblies, e.g. flow restrictors G21C 3/322)} |
| G21C 15/04 | . . |
G21C 15/08 | . . | from moderating material |
G21C 15/10 | . . | from reflector or thermal shield |
G21C 15/12 | . . | from pressure vessel; from containment vessel |
G21C 15/14 | . . | from headers; from joints in ducts |
G21C 15/16 | . |
| . | Emergency cooling arrangements; Removing shut-down heat |
G21C 15/20 | . | Partitions or thermal insulation between fuel channel and moderator |
G21C 15/22 | . | Structural association of coolant tubes with headers (joints of tubes in general F16L) |
| G21C 15/24 | . | Promoting flow of the coolant (electrodynamic pumps H02K 44/02) |
| G21C 15/243 | . . | for liquids |
G21C 15/253 | . . | for gases, e.g. blowers |
G21C 15/257 | . . |
G21C 15/26 | . . | by convection, e.g. using chimneys, using divergent channels |
G21C 15/28 | . | Selection of specific coolants (if serving as the moderator G21C 5/12; compositions per se C09K 5/00; { organic coolants G21C 5/123} ); { Additions to the reactor coolants, e.g. against moderator corrosion (purification and regeneration of the reactor coolants G21C 19/30)} |
|
G21C 17/001 | . |
G21C 17/002 | . |
| G21C 17/003 | . | Remote inspection of vessels, e.g. pressure vessels |
G21C 17/007 | . . | Inspection of the outer surfaces of vessels |
G21C 17/01 | . . | Inspection of the inner surfaces of vessels |
G21C 17/013 | . . | Inspection vehicles |
G21C 17/017 | . | Inspection or maintenance of pipe-lines or tubes in nuclear installations |
| G21C 17/02 | . | Devices or arrangements for monitoring coolant or moderator |
G21C 17/021 | . . | { Solid moderators testing, e.g. graphite} |
| G21C 17/022 | . . | for monitoring liquid coolants or moderators |
G21C 17/0225 | . . . | { Chemical surface treatment, e.g. corrosion (corrosion prevention in presence of water from scale removal or by modification of the properties of the liquid C02F 5/00; inhibiting corrosion by adding corrosion inhibitors C23F 11/00)} |
| G21C 17/025 | . . . |
G21C 17/028 | . . | for monitoring gaseous coolants |
G21C 17/032 | . . |
G21C 17/035 | . . | Moderator- or coolant-level detecting devices { (indicating or measuring liquid level in general G01F 23/00)} |
G21C 17/038 | . . | Boiling detection in moderator or coolant |
| G21C 17/04 | . . | Detecting burst slugs |
G21C 17/041 | . . . | { characterised by systems for checking the coolant channels, e.g. matrix systems} |
G21C 17/042 | . . . | { Devices for selective sampling, e.g. valves, shutters, rotatable selector valves} |
| G21C 17/044 | . . . | { Detectors and metering devices for the detection of fission products} |
G21C 17/048 | . . . | { characterised by a special construction of fuel elements, e.g. by a confined "tracer"} |
| G21C 17/06 | . | 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 17/08 | . | Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window |
| G21C 17/10 | . | Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain |
G21C 17/102 | . . | { the sensitive element being part of a fuel element or a fuel assembly (structural combination with a thermoelectric element for direct production of electrical energy G21C 3/40)} |
G21C 17/104 | . . | Measuring reactivity |
G21C 17/108 | . . | Measuring reactor flux |
G21C 17/112 | . . | Measuring temperature |
G21C 17/116 | . . | Passages or insulators, e.g. for electric cables |
G21C 17/12 | . . | Sensitive element forming part of control element |
G21C 17/14 | . | Period meters |
| Arrangements 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 |
| G21C 19/02 | . | Details of handling arrangements |
G21C 19/04 | . . | Means for controlling flow of coolant over objects being handled; Means for controlling flow of coolant through channel being serviced, { e.g. for preventing "blow-out"} |
| G21C 19/06 | . . | Magazines for holding fuel elements or control elements |
G21C 19/08 | . . | Means for heating fuel elements before introduction into the core; Means for heating or cooling fuel elements after removal from the core |
| . . | Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements (manipulators B25J) |
G21C 19/105 | . . . | with grasping or spreading coupling elements |
G21C 19/11 | . . . | with revolving coupling elements, e.g. socket coupling |
G21C 19/115 | . . . | with latching devices and ball couplings |
G21C 19/12 | . . | Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element |
G21C 19/14 | . | characterised by their adaptation for use with horizontal channels in the reactor core |
G21C 19/16 | . | Articulated or telescopic chutes or tubes for connection to channels in the reactor core |
G21C 19/18 | . | Apparatus for bringing fuel elements to the reactor charge area, e.g. from a storage place |
G21C 19/19 | . | Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements |
| G21C 19/20 | . | 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 19/202 | . . | { Arrangements for handling ball-form, i.e. pebble fuel} |
G21C 19/205 | . . | { Interchanging of fuel elements in the core, i.e. fuel shuffling} |
G21C 19/207 | . . |
| G21C 19/22 | . . | Arrangements for obtaining access to the interior of a pressure vessel whilst the reactor is operating |
G21C 19/26 | . | Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof |
| G21C 19/28 | . | Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core (pumping coolant G21D) |
| G21C 19/30 | . . | with continuous purification of circulating fluent material, e.g. by extraction of fission products { deterioration or corrosion products, impurities, e.g. by cold traps (purification of circulating fluid fuels G21C 19/50; separation in general B01D)} |
G21C 19/32 | . | 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 19/34 | . | Apparatus or processes for dismantling nuclear fuel, e.g. before reprocessing; { Apparatus or processes for dismantling strings of spent fuel elements} (shielded cells G21F 7/00) |
| G21C 19/36 | . . | Mechanical means only |
| G21C 19/365 | . . . | Removing cannings or casings from fuel |
G21C 19/37 | . . . . | by separating into pieces both the canning or the casing and the fuel element, e.g. by cutting or shearing |
G21C 19/375 | . . . | Compacting devices, e.g. for fuel assemblies |
G21C 19/38 | . . | Chemical means only |
G21C 19/40 | . | Arrangements for preventing occurrence of critical conditions, e.g. during storage |
| . | Reprocessing of irradiated fuel |
| Apparatus or processes specially adapted to the manufacture of reactors or parts thereof (in general section B, e.g. B23) |
| G21C 21/02 | . | Manufacture of fuel elements or breeder elements contained in non-active casings |
G21C 21/04 | . . | by vibrational compaction or tamping { of fuel in the jacket} |
G21C 21/06 | . . | by { rotatable} swaging { of the jacket around the fuel} |
G21C 21/08 | . . | by a slip-fit cladding process { by crimping the jacket around the fuel} |
G21C 21/10 | . . | by extrusion, drawing, or stretching { by rolling, e.g. "picture frame" technique} |
G21C 21/12 | . . | by hydrostatic or thermo-pneumatic canning { in general by pressing without lengthening, e.g. explosive coating} |
G21C 21/14 | . . | by plating { the fuel} in a fluid |
G21C 21/16 | . . | by casting or dipping techniques |
G21C 21/18 | . . | Manufacture of control elements covered by group G21C 7/00 |
G21C 23/00 | Adaptations of reactors to facilitate experimentation or irradiation |
| G21C 2001/00 | Reactors |
| G21C 2001/04 | . | Thermal reactors; { Epithermal reactors} |
| G21C 2001/06 | . . | Heterogeneous reactors, i.e. in which fuel and moderator are separated |
| G21C 2001/08 | . . . | moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor (G21C 1/22 takes precedence) |
| G21C 2003/00 | Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements |
| G21C 2003/02 | . |
| G21C 2003/30 | . | Assemblies of a number of fuel elements in the form of a rigid unit |
| G21C 2003/32 | . . | Bundles of parallel pin-, rod-, or tube-shaped fuel elements |
| G21C 2003/322 | . . . | Means to influence the coolant flow through or around the bundles |
| G21C 2003/34 | . . . | Spacer grids |
| G21C 2013/00 | Pressure vessels; Containment vessels; Containment in general (for chemical or physical processes B01J 3/00; pressure vessels in general F16J 12/00) |
| G21C 2013/02 | . | Details |
| G21C 2013/06 | . . | Sealing-plugs (for pressure vessels in general F16J 13/00) |
| G21C 2015/00 | Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants |
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Last Modified: 04/16/2013 4:31:16 PM