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| Class 976 | NUCLEAR TECHNOLOGY |
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![[List of Pre Grant Publications for class 976 subclass DIG1]](../as.gif) | ![[List of Patents for class 976 subclass DIG1]](../ps.gif) | DIG1 | ALLEGED CONTROLLED FUSION REACTORS (G21B-1/00) ** (UNCONTROLLED REACTORS DIG. 423; ARRANGEMENTS FOR HEATING OR CONFINING PLASMA H05H-1/02) |
| | DIG2 |  Combined fission-fusion reactors [G21B-1/00B] *** (see also DIG. 5+) |
| | DIG3 | Inertial confinement fusion reactor [G21B-1/00C] *** (plasma produced by laser H05H-1/22B; by particle beam H05H-1/22C) |
| | DIG4 | Using a beam of particles some of which react with other particles [G21B-1/02] |
| | DIG5 | NUCLEAR REACTORS [G21C-1/00] *** (FUSION REACTORS H05H-1/00; NUCLEAR EXPLOSIVES DIG. 423; ANALOGUE COMPUTERS THEREFOR G06G-7/54) |
| | DIG6 | Integral reactors (i.e., the reactor core and the heat exchanger are placed in one vessel; the reactor vessel and the heat exchanger form an integral construction) [G21C-1/00B] |
| | DIG7 |  Where the prime mover is also placed in the vessel [G21C-1/00B2] |
| | DIG8 | Where the heat exchanger is disposed above the core [G21C-1/00B3] |
| | DIG9 | Where the heat exchanger is disposed beneath the core [G21C-1/00B4] |
| | DIG10 | Where the heat exchanger is disposed beside the core [G21C-1/00B5] |
| | DIG11 | Fast fission reactors (i.e., reactors not using a moderator; metal cooled reactors; fast breeders) [G21C-1/02] |
| | DIG12 | Characterized by the concept and properties of the core [G21C-1/02B] |
| | DIG14 | Cooled by a not essentially pressurized coolant (e.g., tub type) [G21C-1/02D] *** (cooling arrangements DIG. 187+) |
| | DIG15 | Cooled by a pressurized coolant [G21C-1/02F] *** (cooling arrangements DIG. 187+) |
| | DIG16 | Thermal reactors; Epithermal reactors [G21C-1/04] |
| | DIG17 | Heterogeneous reactors (i.e., in which the fuel and moderator are separated) [G21C-1/06] |
| | DIG18 |  Pebble-bed reactors; Reactors with granular fuel [G21C-1/06B] |
| | DIG19 | Moderator being highly pressurized (e.g., boiling water reactor; integral super-heat reactor; pressurized water reactor) [G21C-1/08] *** (DIG. 30 takes precedence) |
| | DIG20 |  Pressure regulating arrangements; "pressurizers" [G21C-1/08B] |
| | DIG21 | Reactors where the coolant is overheated [G21C-1/08D] |
| | DIG22 | Boiling water reactors [G21C-1/08E] |
| | DIG23 | Pressurized water reactors [G21C-1/08F] |
| | DIG24 | Moderator and coolant being different or separated [G21C-1/10] |
| | DIG26 | Moderator being substantially not pressurized (e.g., swimming-pool reactor [G21C-1/14] *** (DIG. 30 takes precedence) |
| | DIG27 | Moderator and coolant being different or separated (e.g., sodium-graphite reactor, sodium-heavy water reactor, organic coolant-heavy water reactor) [G21C-1/16] |
| | DIG30 | Using fluid or fluent fuel [G21C-1/22] *** (With granular fuel DIG. 18) |
| | DIG31 | Homogeneous reactors (i.e., in which the fuel and moderator present an effectively homogeneous medium to the neutrons) [G21C-1/24] |
| | DIG34 | Subcritical reactors; Experimental reactors with exception of swimming-pool reactors, zero-energy reactors [G21C-1/30] |
| | DIG37 | REACTOR FUEL ELEMENTS AND THEIR ASSEMBLIES; SELECTION OF SUBSTANCES FOR USE AS REACTOR FUEL ELEMENTS [G21C-3/00] |
| | DIG38 | Fuel elements [G21C-3/02] *** (manufacturing DIG. 283) |
| | DIG39 | Constructional details [G21C-3/04] |
| | DIG40 | Means for removal of gases from fuel elements [G21C-3/04B] |
| | DIG41 | Fuel elements comprising casings with a mass of granular fuel with coolant passages through them [G21C-3/04C] |
| | DIG42 | Fuel elements with porous or capillary structure [G21C-3/04D] |
| | DIG43 | Casings; Jackets; Jacket materials [G21C-3/06] |
| | DIG44 | Jacket materials (e.g., alloys) [G21C-3/06B] |
| | DIG45 | Provided with external means to promote heat-transfer (e.g., fins, baffles) [G21C-3/08] |
| | DIG46 | End closures; means for tight mounting therefor [G21C-3/10] |
| | DIG48 | Means forming part of the element for locating it within the reactor core [G21C-3/12] *** (means not forming part of the element DIG. 102) |
| | DIG49 | 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-3/14] |
| | DIG50 | Details of the construction within the casing [G21C-3/16] |
| | DIG51 | Means for storage or immobilization of gases in fuel elements [G21C-3/16B] |
| | DIG52 | Internal spacers; Other nonactive material within the casings (e.g., compensating for expansion of fuel rod; compensating for excess reactivity) [G21C-3/18] *** (interlayers DIG. 53) |
| | DIG53 | With coating on fuel or on inside of casing; with nonactive interlayer between casing and active material; with multiple casings or multiple active layers [G21C-3/20] |
| | DIG54 | Elements with fissile or breeder material in contact with coolant [G21C-3/22] |
| | DIG55 | Elements with fissile or breeder material in fluid form within a nonactive casing [G21C-3/24] |
| | DIG56 | Elements with fissile or breeder material in powder form within a nonactive casing [G21C-3/26] *** (DIG. 57 takes precedence) |
| | DIG57 | Elements with fissile or breeder material in solid form within a nonactive casing [G21C-3/28] |
| | DIG58 | Assemblies of number of fuel elements in the form of a rigid unit [G21C-3/30] |
| | DIG59 | Bundles of parallel pin-, rod-, or tube-shaped fuel elements [G21C-3/32] |
| | DIG60 | Means to influence the coolant flow through or around the assembly [G21C-3/32B] *** (DIG. 246 takes precedence) |
| | DIG61 | Coats and envelope surrounding the assembly [G21C-3/32C] |
| | DIG62 | Made of moderator-material [G21C-3/32D] |
| | DIG63 | Comprising fuel-elements of various compositions; comprising other pin-, rod-, or tube-like forms [G21C-3/32G] *** (elements influencing the coolant flow DIG. 60) |
| | DIG64 | Special arrangements of elements in the assembly-lattice (e.g., fissile rods, fertile rods, water rods, poison rods, dummy-rods) [G21C-3/32G2] |
| | DIG68 | Assembling the bundle; Exchange of elements in the bundle [G21C-3/32L] |
| | DIG69 | Spacer elements [G21C-3/32M] *** (spacer grids DIG. 71) |
| | DIG71 | Spacer grids; other spacer devices [G21C-3/34] |
| | DIG72 | Compact spacer grids (e.g., made of a plate or a blade) [G21C-3/34A] |
| | DIG73 | Spacer grids formed of assembled tubular elements [G21C-3/34B] |
| | DIG74 | Spacer grids wherein each cell has a circular cross section; cells formed of assembled metallic nonintersecting strips [G21C-3/34C] |
| | DIG75 | Spacer grids wherein each cell has a polygonal (e.g., square cross section) ; cells formed of assembled metallic nonintersecting strips [G21C-3/34D] |
| | DIG80 | Spacer grids formed by metallic wires (e.g., springs) [G21C-3/34E] |
| | DIG81 | Fabrication of spacer grids [G21C-3/34F] |
| | DIG82 | Assemblies of plate-shaped fuel elements or coaxial tubes [G21C-3/36] |
| | DIG83 | Fuel units consisting of a single fuel element in a supporting sleeve or in another supporting element [G21C-3/38] |
| | DIG85 | Selection of substances for use as reactor fuel [G21C-3/42] |
| | DIG86 | Fluid or fluent reactor fuel [G21C-3/44] |
| | DIG87 | Aqueous compositions [G21C-3/46] |
| | DIG88 | True or colloidal solutions of the active constituent [G21C-3/48] |
| | DIG89 | Suspensions of the active constituent; Slurries [G21C-3/50] |
| | DIG90 | Liquid metal compositions [G21C-3/52] |
| | DIG91 | Fused salt, oxide or hydroxide compositions [G21C-3/54] |
| | DIG92 | Gaseous compositions; Suspensions in a gaseous carrier [G21C-3/56] |
| | DIG93 | Solid reactor fuel; Pellets made of fissile material [G21C-3/58] |
| | DIG99 | MODERATOR OR CORE STRUCTURE; SELECTION OF MATERIALS FOR USE AS MODERATOR [G21C-5/00] |
| | DIG100 | Details [G21C-5/02] |
| | DIG101 | Spatial arrangements allowing for Wigner growth [G21C-5/04] |
| | DIG102 | Means for locating or supporting fuel elements [G21C-5/06] *** (means forming part of the element DIG. 48) |
| | DIG103 | Means for preventing undesired asymmetric expansion of the complete structure (e.g., stretching devices, pins) [G21C-5/08] |
| | DIG104 | Means for supporting the complete structure [G21C-5/10] *** (arrangements for supporting vessels and core structure DIG. 168) |
| | DIG108 | Characterized by shape [G21C-5/14] |
| | DIG110 | Characterized by the provision of more than one active zone [G21C-5/18] |
| | DIG113 | CONTROL OF NUCLEAR REACTION [G21C-7/00] |
| | DIG114 | Flux flattening [G21C-7/00B] |
| | DIG115 | By using self-regulating properties of reactor materials (e.g., Doppler effect) [G21C-7/02] *** (arrangements that involve temperature stability DIG. 136) |
| | DIG117 | By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [G21C-7/06] |
| | DIG118 | By displacement of solid control elements (e.g., control rods) [G21C-7/08] |
| | DIG119 | Construction of control elements [G21C-7/10] |
| | DIG120 | Control assemblies containing one or more absorbant as well as other elements (e.g., fuel or moderator elements) [G21C-7/10B] |
| | DIG121 | Control elements adapted for pebble bed reactors [G21C-7/10C] |
| | DIG122 | Deformable control elements (e.g., flexible, telescopic or articulated) [G21C-7/10D] |
| | DIG123 | Control elements made of flat elements; Control elements having cruciform cross section [G21C-7/10E] |
| | DIG124 | Cluster or spider control rods [G21C-7/10F] |
| | DIG125 | Means for moving control elements to desired position [G21C-7/12] |
| | DIG128 | Means for obtaining differential movement of control elements [G21C-7/18] |
| | DIG129 | Disposition of shock-absorbing devices; Braking arrangements [G21C-7/20] *** (shock absorbers in general F16F) |
| | DIG130 | By displacement of a fluid or fluent neutron-absorbing material (e.g., by adding neutron absorbing material to the coolant) [G21C-7/22] |
| | DIG131 | Selection of substances for use as neutron-absorbing material [G21C-7/24] |
| | DIG132 | By displacement of the moderator or parts thereof; by changing the moderator concentration [G21C-7/26] |
| | DIG134 | By displacement of the reflector or parts thereof [G21C-7/28] |
| | DIG135 | By displacement of the reactor fuel or fuel elements [G21C-7/30] |
| | DIG136 | By varying flow of coolant through the core; by adjusting the coolant or moderator temperature [G21C-7/32] |
| | DIG137 | By utilization of a primary neutron source [G21C-7/34] |
| | DIG138 | Control circuits [G21C-7/36] |
| | DIG139 | EMERGENCY PROTECTION ARRANGEMENTS STRUCTALLY ASSOCIATED WITH THE REACTOR (E.G., SAFETY VALVES PROVIDED WITH PRESSURE EQUALIZATION DEVICES) [G21C-9/00] *** (EMERGENCY COOLING ARRANGEMENTS DIG. 196) |
| | DIG140 | Pressure suppression [G21C-9/00B] |
| | DIG141 | By rupture discs or diaphragms [G21C-9/00B2] |
| | DIG142 | By stream condensation or by thermal accumulation [G21C-9/00B4] |
| | DIG143 | Core catchers [G21C-9/00D] |
| | DIG144 | Against explosions (e.g., blast shields) [G21C-9/00F] |
| | DIG145 | Against Na- or Ka- reactions [G21C-9/00I] |
| | DIG147 | By fast movement of a solid (e.g, pebbles) [G21C-9/02B] |
| | DIG148 | By an absorbant fluid [G21C-9/02D] |
| | DIG149 | Reactor fuses [G21C-9/02F] |
| | DIG150 | Rupture diaphragms [G21C-9/02H] |
| | DIG151 | Means for suppressing fires; Earthquake protection [G21C-9/04] |
| | DIG152 | SHEILDING STRUCTURALLY ASSOCIATED WITH THE REACTOR [G21C-11/00] |
| | DIG153 | Biological sheilding; Neutron and gamma shielding [G21C-11/02] *** (in general DIG. 319+) |
| | DIG154 | Inside the reactor vessel [G21C-11/02B] |
| | DIG156 | In apertures or channels through a wall [G21C-11/02D] |
| | DIG157 | Characterized by the form or by the material [G21C-11/02F] |
| | DIG158 | On waterborne craft [G21C-11/04] |
| | DIG159 | Reflecting shields (i.e., for minimizing loss of neutrons) [G21C-11/06] |
| | DIG160 | Thermal shields; Thermal linings (i.e., for dissipating heat from gamma radiation which would otherwise heat an outer biological shield); Thermal insulation [G21C-11/08] |
| | DIG161 | Consisting of a nonmetallic layer of insulating material [G21C-11/08B] |
| | DIG162 | Consisting of one or more metallic layers [G21C-11/08D] |
| | DIG164 | Consisting of a combination of nonmetallic and metallic layers (e.g., metal-sand-metal-concrete) [G21C-11/08E] |
| | DIG165 | Consisting of a stagnant or a circulating fluid [G21C-11/08F] |
| | DIG166 | PRESSURE VESSELS; CONTAINMENT VESSELS [G21C-13/00] *** (CHEMICAL OR PHYSICAL PROCESSES B01J-3/00; PRESSURE VESSELS IN GENERAL F16J-12/00) |
| | DIG167 | Details (e.g., seals, supporting constructions, ventillating arrangements, tube joints with a vessel wall) [G21C-13/02] |
| | DIG168 | Supporting constructions for pressure vessels or containers [G21C-13/02B] |
| | DIG169 | Seals (e.g., for pressure vessels or containers [G21C-13/02D] |
| | DIG171 | Tube joints with a vessel wall (e.g., taking into account thermal stresses) [G21C-13/02F] |
| | DIG172 | Ventillating arrangements [G21C-13/02G] |
| | DIG173 | Tube crossings through a vessel wall [G21C-13/02H] |
| | DIG174 | Arrangements for expansion and contraction [G21C-13/04] |
| | DIG175 | Sealing plugs [G21C-13/06] |
| | DIG180 | Vessels characterized by the material; Selection of materials for pressure vessels [G21C-13/08] |
| | DIG186 | Means for preventing contamination in the event of leakage (e.g., double wall) [G21C-13/10] |
| | DIG187 | COOLING ARRANGEMENTS WITHIN THE PRESSURE VESSEL CONTAINING THE CORE; SELECTION OF SPECIFIC COOLANTS [G21C-15/00] |
| | DIG189 | From fissile or breeder material [G21C-15/04] *** (DIG. 59 takes precedence) |
| | DIG191 | From moderating material [G21C-15/08] |
| | DIG192 | From reflector or thermal shield [G21C-15/10] |
| | DIG193 | From pressure vessel; from containment vessel [G21C-15/12] |
| | DIG194 | From headers; from joints in ducts [G21C-15/14] |
| | DIG195 | Comprising means for separating liquid and steam [G21C-15/16] |
| | DIG196 | Emergency cooling arrangements; Removing shut-down heat [G21C-15/18] |
| | DIG197 | Partitions or thermal insulation between fuel channel and moderator [G21C-15/20] |
| | DIG198 | Structural association of coolant tubes with headers [G21C-15/22] |
| | DIG199 | Promoting flow of the coolant [G21C-15/24] |
| | DIG200 | For liquids [G21C-15/24B] |
| | DIG203 | For gases (ventilators) [G21C-15/24D] |
| | DIG204 | Heat-pipes [G21C-15/24F] |
| | DIG205 | By convection (e.g., using chimneys, using divergent channels [G21C-15/26] |
| | DIG207 | MONITORING; TESTING; MAINTAINING [G21C-17/00] |
| | DIG208 | Mechanical simulators [G21C-17/00B] *** (electrical or magnetic simulators G06G-7/54) |
| | DIG209 | Detection of leaks [G21C-17/00C] *** (by testing the coolant or the moderator DIG. 224) |
| | DIG210 | Remote inspection of vessels (e.g., pressure vessels) [G21C-17/00D] |
| | DIG211 | Inspection of outer surfaces of vessels [G21C-17/00D1] |
| | DIG212 | Inspection of inner surfaces of vessels [G21C-17/00D2] |
| | DIG213 | Inspection vehicles [G21C-17/00D3] |
| | DIG214 | Inspection or maintenance of pipe-lines or tubes in nuclear installations [G21C-17/00F] |
| | DIG215 | Devices or arrangements for monitoring coolant or moderator [G21C-17/02] |
| | DIG216 | For monitoring liquid coolants or moderators [G21C-17/02B] |
| | DIG217 | For monitoring liquid metal coolants [G21C-17/02B2] *** (molten metal sampling in general G01N-1/12B) |
| | DIG219 | For monitoring gaseous coolants [G21C-17/02D] |
| | DIG220 | Solid moderators testing (e.g., graphite) [G21C-17/02F] |
| | DIG221 | Reactor coolants flow measuring or monitoring [G21C-17/02H] *** (measuring volume or mass flow in general G01F) |
| | DIG222 | Moderator or coolant level detection devices [G21C-17/02K] *** (indicating or measuring liquid level in general G01F-23/00) |
| | DIG223 | Moderator or coolant boiling detection [G21C-17/02M] |
| | DIG224 | Detecting burst slugs [G21C-17/04] |
| | DIG225 | Characterized by (matrix) systems for checking the coolant channels [G21C-17/04B] |
| | DIG226 | Devices for selective sampling (e.g., valves, shutters, rotatable selector valves) [G21C-17/04D] |
| | DIG227 | Detectors and metering devices for the detection of fission products [G21C-17/04F] |
| | DIG230 | Characterized by a special construction of fuel elements (e.g., by a confined "tracer") [G21C-17/04H] |
| | DIG232 | Leak-tightness control [G21C-17/06B] *** (DIG. 234 takes precedence) |
| | DIG233 | Burn-up control [G21C-17/06D] *** (DIG. 234 takes precedence) |
| | DIG234 | Control of spherical elements [G21C-17/06F] |
| | DIG235 | Structural combination of reactor core or moderator structure with viewing means (e.g., with television camera, periscope, window) [G21C-17/08] |
| | DIG236 | Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments (e.g., for measuring temperature) [G21C-17/10] |
| | DIG237 | Measuring reactivity [G21C-17/10B] |
| | DIG238 | Measuring the reactor flux within the reactor (e.g., within its pressure vessel) [G21C-17/10D] |
| | DIG239 | Measuring the temperature [G21C-17/10E] |
| | DIG240 | Passages and insulators for electric cables and for measuring purposes [G21C-17/10G] |
| | DIG242 | Sensitive element forming part of control element [G21C-17/12] |
| | DIG243 | Period meters [G21C-17/14] |
| | DIG244 | 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-19/00] |
| | DIG245 | Details of handling arrangements [G21C-19/02] |
| | DIG246 | 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-19/04] |
| | DIG247 | Magazines for holding fuel element or control elements [G21C-19/06] |
| | DIG250 | Means for heating fuel elements before introduction into the core; Means for heating or cooling fuel elements after removal from the core [G21C-19/08] |
| | DIG251 | Lifting devices or pulling devices adapted for cooperation with fuel elements or with control elements [G21C-19/10] |
| | DIG252 | With grasping or spreading coupling elements [G21C-19/10B] |
| | DIG253 | With revolving coupling elements (e.g., socket coupling) [G21C-19/10D] |
| | DIG254 | With latching devices and ball couplings [G21C-19/10F] |
| | DIG255 | Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element [G21C-19/12] |
| | DIG256 | Characterized by their adaptation for use with horizontal channels in the reactor core [G21C-19/14] |
| | DIG257 | Articulated or telescopic chutes or tubes for the connection to channels in the reactor core [G21C-19/16] |
| | DIG258 | Apparatus for bringing fuel elements to the reactor charge area (e.g., from a storage place) [G21C-19/18] |
| | DIG260 | Arrangements for handling ball-form (i.e., pebble fuel) [G21C-19/20A] |
| | DIG261 | Interchanging of fuel elements in the core (fuel shuffling) [G21C-19/20B] |
| | DIG262 | Arrangements for obtaining access to the interior of a pressure vessel while the reactor is operating [G21C-19/22] |
| | DIG264 | Arrangements for removing jammed or damaged fuel elements or control elements; Arrangements for moving broken parts thereof [G21C-19/26] |
| | DIG265 | Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core [G21C-19/28] *** (pumping coolant DIG. 199+ and 294) |
| | DIG276 | Arrangements for preventing occurence of critical conditions (e.g., during storage) [G21C-19/40] |
| | DIG277 | Reprocessing of irradiated fuel [G21C-19/42] |
| | DIG278 | Of irradiated solid fuel [G21C-19/44] |
| | DIG279 | Aqueous processes (e.g., by using organic extraction means, including the regeneration of these means) [G21C-19/46] |
| | DIG280 | Nonaqueous processes [G21C-19/48] |
| | DIG281 | Of irradiated fuel; also the regeneration of the fuels while the reactor is in operation [G21C-19/50] |
| | DIG282 | APPARATUS OR PROCESSES SPECIALLY ADAPTED TO THE MANUFACTURE OF REACTORS OR PARTS THEREOF [G21C-21/00] *** (IN GENERAL SECTION B, E.G., B23) |
| | DIG283 | Manufacture of fuel elements or breeder elements contained in nonactive casings [G21C-21/02] |
| | DIG284 | By vibrational compaction or tamping of fuel in the jacket [G21C-21/04] |
| | DIG285 | By rotatable swaging of the jacket around the fuel [G21C-21/06] |
| | DIG286 | By a slip-fit cladding process; by crimping the jacket around the fuel [G21C-21/08] |
| | DIG287 | By extrusion, drawing, or stretching; by rolling (e.g., "picture frame" technique) [G21C-21/10] |
| | DIG288 | By hydrostatic or thermo-pneumatic cannings (in general by pressing without lenthening, e.g., explosive coating) [G21C-21/12] |
| | DIG289 | By plating the fuel in a fluid [G21C-21/14] |
| | DIG290 | By casting or dipping techniques [G21C-21/16] |
| | DIG291 | Manufacture of control elements covered by DIG. 113+ [G21C-21/18] |
| | DIG292 | DETAILS OF NUCLEAR POWER PLANT [G21D-1/00] *** (CONTROL DIG. 296) |
| | DIG293 | Nuclear facilities decommissioning arrangements [G21D-1/00B] *** (decontamination arrangements; treating radioactively contaminated material DIG. 375+) |
| | DIG294 | Arrangements of auxiliary equipment [G21D-1/02] |
| | DIG295 | Pumping arrangements [G21D-1/04] *** (within the reactor pressure vessel DIG. 199+; electrodynamic pumps H02K-44/02) |
| | DIG296 | CONTROL OF NUCLEAR POWER PLANT [G21D-3/00] *** (CONTROL OF NUCLEAR REACTION IN GENERAL DIG. 113) |
| | DIG297 | Manual control [G21D-3/02] |
| | DIG298 | Safety arrangements [G21D-3/04] *** (emergency protection of reactor DIG. 139+) |
| | DIG300 | Regulation of any parameters in the plant [G21D-3/08] |
| | DIG301 | By a combination of a variable derived from neutron flux with other controlling variables (e.g., derived from temperature, cooling flow, pressure) [G21D-3/10] |
| | DIG302 | By adjustment of the reactor in response only to changes in engine demand [G21D-3/12] |
| | DIG305 | By adjustment of plant external to the reactor only in response to change in reactivity [G21D-3/18] |
| | DIG306 | ARRANGEMENTS OF REACTOR AND ENGINE IN WHICH REACTOR-PRODUCED HEAT IS CONVERTED INTO MECHANICAL ENERGY [G21D-5/00] |
| | DIG307 | Reactor and engine structurally combined (e.g., portable) [G21D-5/02] |
| | DIG308 | Reactor and engine not structurally combined [G21D-5/04] |
| | DIG309 | With engine working medium circulating through reactor core [G21D-5/06] |
| | DIG310 | With engine working medium heated in a heat exhanger by the reactor coolant [G21D-5/08] |
| | DIG315 | ARRANGEMENTS FOR DIRECT PRODUCTION OF ELECTRIC ENERGY FROM FUSION OR FISSION REACTIONS [G21D-7/00] *** (OBTAINING ELECTRIC ENERGY FROM RADIOACTIVE SOURCES DIG. 410) |
| | DIG316 | Using magneto-hydrodynamic generators [G21D-7/02] |
| | DIG318 | ARRANGEMENTS TO PROVIDE HEAT FOR PURPOSES OTHER THAN CONVERSION INTO POWER (E.G., FOR HEATING BUILDINGS) [G21D-9/00] |
| | DIG319 | SHIELDING CHARACTERIZED BY THE COMPOSITION OF THE MATERIALS [G21F-1/00] |
| | DIG320 | Selection of uniform shielding materials [G21F-1/02] |
| | DIG321 | Liquids [G21F-1/02B] |
| | DIG322 | Semi-liquids, gels, pastes [G21F-1/02C] |
| | DIG323 | Concretes; Other hydraulic hardening materials [G21F-1/04] |
| | DIG327 | Ceramics; Glasses; Refractories [G21F-1/06] *** (cermets DIG. 328) |
| | DIG328 | Metals; Alloys; Cermets (i.e., sintered mixtures of ceramics and metals) [G21F-1/08] |
| | DIG330 | Organic substances; Dispersions in organic carriers [G21F-1/10] |
| | DIG333 | Laminated shielding materials [G21F-1/12] |
| | DIG335 | SHIELDING CHARACTERIZED BY ITS PHYSICAL FORM (E.G., GRANULES OR SHAPE OF THE MATERIAL) [G21F-3/00] |
| | DIG336 | Clothing [G21F-3/02] |
| | DIG337 | Clothing surrounding the wearer completely [G21F-3-02B] |
| | DIG338 | Aprons [G21F-3/02C] |
| | DIG339 | Gloves [G21F-3/02D] *** (mounting means on glove boxes DIG. 363) |
| | DIG340 | Bricks; Shields made up therefrom [G21F-3/04] |
| | DIG341 | TRANSPORTABLE OR PORTABLE SHIELDED CONTAINERS [G21F-5/00] |
| | DIG342 | Containers for fluid wastes [G21F-5/00A] |
| | DIG343 | Containers for solid radioactive wastes (e.g., ultimate disposal containers) [G21F-5/00B] *** (DIG. 347 takes precedence) |
| | DIG346 | Shock absorbers, specially adapted therefor (e.g., impact buffers for containers) [G21F5-00D] |
| | DIG347 | Containers provided with a rotatable drum [G21F-5/00F] |
| | DIG348 | Specially adapted heat removal systems (e.g., by a circulating fluid or by cooling fins.); Specially adapted protection against external fire [G21F-5/00H] |
| | DIG349 | Closures for containers or corresponding sealing arrangements [G21F-5/00J] |
| | DIG350 | For storing radioactive sources (e.g., source carriers for irradiation units); Radio isotope containers [G21F-5/00L] |
| | DIG352 | Specially adapted containers or shipping cask handling devices (e.g., transporting devices) [G21F-5/00N] |
| | DIG353 | With provision for restricted exposure of a radiation source within the container [G21F-5/02] |
| | DIG355 | SHIELDED CELLS OR ROOMS [G21F-7/00] |
| | DIG356 | Shielded passages through walls; Locks; Transferring devices between rooms [G21F-7/00B] *** (between glove-boxes DIG. 362) |
| | DIG358 | Room atmosphere, temperature or pressure control devices [G21F-7/00C] *** (glove-boxes DIG. 364) |
| | DIG359 | Observation devices permitting vision but shielding the observer (e.g., window, periscope) [G21F-7/02] |
| | DIG361 | Shielded glove-boxes [G21F-7/04] |
| | DIG362 | Shielded passages through walls; Locks; Closing or transferring means between glove-boxes [G21F-7/04B] *** (in general DIG. 356) |
| | DIG363 | Glove mounting means [G21F-7/04C] |
| | DIG364 | Glove-box atmosphere, temperature or pressure control devices [G21F-7/04D] *** (in general DIG. 358) |
| | DIG365 | Lighting [G21F-7/04F] |
| | DIG366 | Transportable glove-boxes [G21F-7/04G] |
| | DIG367 | Structural combination with remotely controlled apparatus (e.g., with manipulators) [G21F-7/06] |
| | DIG368 | Integrated manipulators [G21F-7/06B] |
| | DIG370 | Remotely manipulated measuring or controlling devices [G21F-7/06C] *** (combined with window DIG. 359) |
| | DIG371 | Remotely manipulated machinery [G21F-7/06D] |
| | DIG372 | Remotely manipulated tools [G21F-7/06F] |
| | DIG373 | Transferring devices within cells or boxes [G21F-7/06G] *** (between cells DIG. 356, 362) |
| | DIG374 | Remotely manipulating devices for fluids [G21F-7/06H] |
| | DIG375 | DECONTAMINATION ARRANGEMENTS; TREATING RADIOACTIVELY CONTAMINATED MATERIAL [G21F-9/00] |
| | DIG376 | Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof [G21F-9/00B] |
| | DIG377 | Recovery of isotopes from radioactive waste (e.g., fission products [G21F-9/00C] |
| | DIG378 | Treating gases [G21F-9/02] |
| | DIG379 | Treating liquids [G21F-9/04] |
| | DIG380 | Processing [G21F-9/06] |
| | DIG381 | By evaporation; by distillation [G21F-9/08] |
| | DIG382 | By flocculation [G21F-9/10] |
| | DIG383 | By absorption; by adsorption; by ion exchange [G21F-9/12] |
| | DIG384 | By incineration; by calcination (e.g., desiccation) [G21F-9/14] |
| | DIG385 | By fixation in stable solid media [G21F-9/16] |
| | DIG386 | By biological processes [G21F-9/18] |
| | DIG387 | Disposal of liquid waste [G21F-9/20] |
| | DIG391 | Treating solids [G21F-9/28] |
| | DIG396 | ARRANGEMENTS FOR CONVERTING CHEMICAL ELEMENTS BY ELECTROMAGNETIC RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT (E.G., PRODUCING RADIOACTIVE ISOTOPES) [G21G-1/00] |
| | DIG397 | In nuclear reactors {G21G-1/02] |
| | DIG398 | Outside of nuclear reactors or particle accelerators [G21G-1/04] |
| | DIG403 | RADIOACTIVE SOURCES [G21G-4/00] *** (PRODUCING NEUTRONS OR OTHER SUBATOMIC PARTICLES, X- OR GAMMA RAYS, IN FUSION REACTORS DIG. 1+, IN NUCLEAR REACTORS DIG. 5+; IN ACCELERATORS H05H; X-RAY TUBES H01J-35/00; GAMMA MASERS H01S-4/00) |
| | DIG404 | Neutron sources [G21G-4/02] |
| | DIG405 | Radioactive sources other than neutron sources [G21G-4/04] |
| | DIG409 | ALLEGED CONVERSION OF CHEMICAL ELEMENTS BY CHEMICAL REACTION [G21G-5/00] |
| | DIG410 | ARRANGEMENTS FOR OBTRAINING ELECTRICAL ENERGY FROM RADIOACTIVE SOURCES (E.G., FROM RADIOACTIVE ISOTOPES, NUCLEAR OR ATOMIC BATTERIES) [G21H-1/00] *** (FUSION REACTORS DIG. 1+; NUCLEAR REACTORS DIG. 5+) |
| | DIG411 | Cells charged directly by beta radiation [G21H-1/02] |
| | DIG412 | Cells using secondary emission induced by alpha radiation, beta radiation, or gamma radiation [G21H-1/04] *** (discharge tubes H01J-40/00) |
| | DIG413 | Cells wherein radiation is applied to the junction of different semiconductor materials [G21H-1/06] |
| | DIG414 | Cells in which radiation ionizes a gas in the presence of a junction of two dissimilar metals (i.e., contact potential difference cells) [G21H-1/08] *** (discharge tubes H01J) |
| | DIG416 | Cells provided with thermoelectric generators [G21H-1/10B] |
| | DIG417 | Cells provided with thermionic generators [G21H-1/10C] |
| | DIG418 | Cells using conversion of the radiation into light combined with subsequent photoelectric conversion into electric energy [G21H-1/12] |
| | DIG419 | ARRANGEMENTS FOR DIRECT CONVERSION OF RADIATION ENERGY FROM RADIOACTIVE SOURCES TO FORMS OF ENERGY OTHER THAN ELECTRIC ENERGY (E.G., LIGHT) [G21H-3/00] |
| | DIG421 | APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES OR ARRANGEMENTS THEREFOR [G21H-5/00] *** |
| | DIG422 | As tracers [G21H-5/02] *** (medicinal preparations containing radioactive substances A61K-43/00; investigating or analyzing biological material G01N-33/16) |
| | DIG423 | NUCLEAR EXPLOSIVE DEVICES; "ATOMIC BOMBS") [G21J-1/00] |
| | DIG424 | PEACEFUL APPLICATIONS OF NUCLEAR EXPLOSIVE DEVICES [G21J-3/00] *** (OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIAL FROM DEEP WELLS BY MEANS OF NUCLEAR ENERGY E21B-43/236F, 43/24F) |
| | DIG426 | DETECTION ARRANGEMENTS FOR NUCLEAR EXPLOSIONS [G21J-5/00] *** (INDIVIDUAL MEASURING DEVICES G01N) |
| | DIG427 | ARRANGEMENTS FOR HANDLING RADIATION OR PARTICLES (E.G., FOCUSING, MODERATING [G21K-1/00] *** (RADIATION FILTERS DIG. 435) |
| | DIG428 | Using diaphragms, collimators [G21K-1/02] |
| | DIG429 | Using multiple collimators (e.g., Bucky screens); other devices for eliminating undesired or dispersed radiation [G21K-1/02B] |
| | DIG430 | Using variable diaphragms, shutters, choppers [G21K-1/04] |
| | DIG431 | Using diffraction, refraction or reflection, e.g., monochromators [G21K-1/06] *** (DIG. 435, 445 take precedence) |
| | DIG435 | Scattering devices; Absorbing devices [G21K-1/10] |
| | DIG437 | Using charge exchange devices (e.g., for neutralizing or changing the sign of the electrical charges of beams) [G21K-1/14] *** (producing or accelerating neutral particle beams H05H-3/00) |
| | DIG438 | Using polarizing devices (e.g., for obtaining a polarized beam) [G21K-1/16] *** (ion sources, ion guns H01J-27/02; polarized targets for producing nuclear reactions H05H-6/00B) |
| | DIG439 | CONVERSION SCREENS FOR THE CONVERSION OF THE SPATIAL DISTRIBUTION OF X-RAYS OR PARTICLE RADIATION INTO VISIBLE IMAGES (E.G., FLUOROSCOPIC SCREENS) [G21K-4/00] *** (PHOTOGRAPHIC PROCESSES USING X-RAY INTENSIFIERS G03C-5/17; DISCHARGE TUBES COMPRISING LUMINESCENT SCREENS H01J-1/62; CATHODE-RAY TUBES FOR X-RAY CONVERSION WITH OPTICAL OUTPUT H01J-31/50) |
| | DIG440 | IRRADIATION DEVICES [G21K-5/00] *** (DISCHARGE TUBES FOR IRRADIATING H01J-37/00) |
| | DIG441 | Having no beam-forming means [G21K-5/02] |
| | DIG442 | With beam-forming means [G21K-5/04] |
| | DIG443 | Holder for targets or for other objects to be irradiated [G21K-5/08] |
| | DIG444 | With provision for relative movement of beam source and object to be irradiated [G21K-5/10] |
| | DIG445 | GAMMA- OR X-RAY MICROSCOPES [G21K-7/00] |
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