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Class Information
Number: 976
Name: Nuclear technology >
Description: Note the following for Class 976:










Class Number Class Name No. of Patents
976/DIG.1

Alleged controlled fusion reactors (g21b-1/00) ** (uncontrolled reactors dig. 423; arrangements for heating or confining plasma h05h-1/02)

76
976/DIG.2

Combined fission-fusion reactors [g21b-1/00b] *** (see also dig. 5+)

5
976/DIG.3

Inertial confinement fusion reactor [g21b-1/00c] *** (plasma produced by laser h05h-1/22b; by particle beam h05h-1/22c)

14
976/DIG.4

Using a beam of particles some of which react with other particles [g21b-1/02]

26
976/DIG.409

Alleged conversion of chemical elements by chemical reaction [g21g-5/00]

1
976/DIG.282

Apparatus or processes specially adapted to the manufacture of reactors or parts thereof [g21c-21/00] *** (in general section b, e.g., b23)

30
976/DIG.283

Manufacture of fuel elements or breeder elements contained in nonactive casings [g21c-21/02]

54
976/DIG.286

By a slip-fit cladding process; by crimping the jacket around the fuel [g21c-21/08]

8
976/DIG.290

By casting or dipping techniques [g21c-21/16]

0
976/DIG.287

By extrusion, drawing, or stretching; by rolling (e.g., "picture frame" technique) [g21c-21/10]

2
976/DIG.288

By hydrostatic or thermo-pneumatic cannings (in general by pressing without lenthening, e.g., explosive coating) [g21c-21/12]

3
976/DIG.289

By plating the fuel in a fluid [g21c-21/14]

0
976/DIG.285

By rotatable swaging of the jacket around the fuel [g21c-21/06]

0
976/DIG.284

By vibrational compaction or tamping of fuel in the jacket [g21c-21/04]

4
976/DIG.291

Manufacture of control elements covered by dig. 113+ [g21c-21/18]

12
976/DIG.421

Applications of radiation from radioactive sources or arrangements therefor [g21h-5/00] ***

9
976/DIG.422

As tracers [g21h-5/02] *** (medicinal preparations containing radioactive substances a61k-43/00; investigating or analyzing biological material g01n-33/16)

23
976/DIG.396

Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment (e.g., producing radioactive isotopes) [g21g-1/00]

3
976/DIG.397

In nuclear reactors {g21g-1/02]

4
976/DIG.398

Outside of nuclear reactors or particle accelerators [g21g-1/04]

27
976/DIG.401

By bombardment with electrically charged particles [g21g-1/10] *** (irradiation devices dig. 440+)

20
976/DIG.402

By electromagnetic irradiation (e.g., with gamma or x-rays) [g21g-1/12] *** (applications of radiation dig. 421; irradiation devices dig. 440+)

1
976/DIG.399

By neutron irradiation [g21g-1/06]

8
976/DIG.400

Accompanied by nuclear fission [g21g-1/08]

2
976/DIG.419

Arrangements for direct conversion of radiation energy from radioactive sources to forms of energy other than electric energy (e.g., light) [g21h-3/00]

0
976/DIG.420

In which material is excited to luminesce by the radiation [g21h-3/02]

3
976/DIG.315

Arrangements for direct production of electric energy from fusion or fission reactions [g21d-7/00] *** (obtaining electric energy from radioactive sources dig. 410)

2
976/DIG.316

Using magneto-hydrodynamic generators [g21d-7/02]

3
976/DIG.317

Using thermoelectric elements and/or thermoionic converters [g21d-7/04] *** (structural combination of fuel element with thermoelectric element and/or thermoionic converter dig. 84; structural combination of fuel element with thermoelectric element dig. 415, dig. 84)

12
976/DIG.427

Arrangements for handling radiation or particles (e.g., focusing, moderating [g21k-1/00] *** (radiation filters dig. 435)

35
976/DIG.432

Deviation, concentration or focusing of the beam by electric or magnetic means [g21k-1/08] *** (electron-optical arrangements in electric discharge tubes h01j-29/46; details (e.g., electric or magnetic deviating means for direct voltage accelerators or in accelerators using single pulses) h05h-5/02; arrangements for injecting particles into orbits h05h-7/08; arrangements for ejecting particles from orbits h05h-7/10)

22
976/DIG.433

By electrical means [g21k-1/087]

13
976/DIG.434

By magnetic means [g21k-1/093]

42
976/DIG.435

Scattering devices; absorbing devices [g21k-1/10]

61
976/DIG.436

Resonant absorbers or driving arrangements therefor (e.g., for moessbauer-effect devices) [g21k-1/12] *** (motors with reciprocating, oscillating or vibrating magnet, armature or coil system in general h02k-33/00)

2
976/DIG.437

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)

30
976/DIG.428

Using diaphragms, collimators [g21k-1/02]

82
976/DIG.429

Using multiple collimators (e.g., bucky screens); other devices for eliminating undesired or dispersed radiation [g21k-1/02b]

110
976/DIG.430

Using variable diaphragms, shutters, choppers [g21k-1/04]

85
976/DIG.431

Using diffraction, refraction or reflection, e.g., monochromators [g21k-1/06] *** (dig. 435, 445 take precedence)

54
976/DIG.438

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)

9
976/DIG.410

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+)

5
976/DIG.411

Cells charged directly by beta radiation [g21h-1/02]

3
976/DIG.414

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)

0
976/DIG.415

Cells in which radiation of disintegration heats a thermoelectric junction or a thermionic converter [g21h-1/10] *** (devices where heating occurs from fission reactions dig. 39; discharge tubes functioning as thermionic generators h01j-45/00; thermoelectric devices comprising a junction of dissimilar materials h01l-35/00)

2
976/DIG.417

Cells provided with thermionic generators [g21h-1/10c]

3
976/DIG.416

Cells provided with thermoelectric generators [g21h-1/10b]

28
976/DIG.418

Cells using conversion of the radiation into light combined with subsequent photoelectric conversion into electric energy [g21h-1/12]

7
976/DIG.412

Cells using secondary emission induced by alpha radiation, beta radiation, or gamma radiation [g21h-1/04] *** (discharge tubes h01j-40/00)

1
976/DIG.413

Cells wherein radiation is applied to the junction of different semiconductor materials [g21h-1/06]

6
976/DIG.244

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]

37
976/DIG.258

Apparatus for bringing fuel elements to the reactor charge area (e.g., from a storage place) [g21c-19/18]

23
976/DIG.272

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 [g21c-19/32] *** (disposal of waste material dig. 375+)

44
976/DIG.273

Apparatus or processes for removing canning or casings from fuel; separation of fuel and jacket material; also fuel elements, perforation (e.g., for sampling); separation of fuel elements and fuel element-jackets in pieces; removal of end closures [g21c-19/34] *** (shielded cells dig. 355+)

36
976/DIG.275

Chemical means only [g21c-19/38]

11
976/DIG.274

Mechanical means only [g21c-19/36]

49
976/DIG.265

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)

11
976/DIG.266

With continuous purification of circulating fluent material (e.g., by extraction of fission products, deterioration or corrosion products, impurities (e.g., by cold traps) [g21c-19/30] *** (purification of circulating fluid fuels dig. 281; separation in general b01d)

21
976/DIG.271

Recombination devices [g21c-19/30r]

16
976/DIG.267

Specially adapted for gases [g21c-19/30b] *** (decontamination of gases dig. 378)

26
976/DIG.268

Specially adapted for liquids [g21c-19/30d] *** (decontamination of liquids dig. 379)

33
976/DIG.269

For molten metals [g21c-19/30d2]

10
976/DIG.270

Using "cold traps" [g21c-19/30d2b]

13
976/DIG.259

Arrangements for introducing object into the pressure vessel; arrangements for handling objects within the pressure vessel; arrangements for removing objects from the pressure vessel [g21c-19/20]

36
976/DIG.260

Arrangements for handling ball-form (i.e., pebble fuel) [g21c-19/20a]

5
976/DIG.262

Arrangements for obtaining access to the interior of a pressure vessel while the reactor is operating [g21c-19/22]

1
976/DIG.263

By using an auxiliary vessel which is temporarily sealed to the pressure vessel [g21c-19/24]

0
976/DIG.261

Interchanging of fuel elements in the core (fuel shuffling) [g21c-19/20b]

10
976/DIG.276

Arrangements for preventing occurence of critical conditions (e.g., during storage) [g21c-19/40]

42
976/DIG.264

Arrangements for removing jammed or damaged fuel elements or control elements; arrangements for moving broken parts thereof [g21c-19/26]

18
976/DIG.257

Articulated or telescopic chutes or tubes for the connection to channels in the reactor core [g21c-19/16]

11
976/DIG.256

Characterized by their adaptation for use with horizontal channels in the reactor core [g21c-19/14]

3
976/DIG.245

Details of handling arrangements [g21c-19/02]

42
976/DIG.255

Arrangements for exerting direct hydraulic or pneumatic force on fuel element or on control element [g21c-19/12]

2
976/DIG.251

Lifting devices or pulling devices adapted for cooperation with fuel elements or with control elements [g21c-19/10]

40
976/DIG.252

With grasping or spreading coupling elements [g21c-19/10b]

37
976/DIG.254

With latching devices and ball couplings [g21c-19/10f]

5
976/DIG.253

With revolving coupling elements (e.g., socket coupling) [g21c-19/10d]

2
976/DIG.247

Magazines for holding fuel element or control elements [g21c-19/06]

19
976/DIG.249

Rotatable magazines [g21c-19/06d]

3
976/DIG.248

Storage racks; storage pools [g21c-19/06b]

77
976/DIG.246

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]

1
976/DIG.250

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]

11
976/DIG.277

Reprocessing of irradiated fuel [g21c-19/42]

6
976/DIG.281

Of irradiated fuel; also the regeneration of the fuels while the reactor is in operation [g21c-19/50]

1
976/DIG.278

Of irradiated solid fuel [g21c-19/44]

9
976/DIG.279

Aqueous processes (e.g., by using organic extraction means, including the regeneration of these means) [g21c-19/46]

73
976/DIG.280

Nonaqueous processes [g21c-19/48]

22
976/DIG.306

Arrangements of reactor and engine in which reactor-produced heat is converted into mechanical energy [g21d-5/00]

5
976/DIG.308

Reactor and engine not structurally combined [g21d-5/04]

1
976/DIG.309

With engine working medium circulating through reactor core [g21d-5/06]

14
976/DIG.310

With engine working medium heated in a heat exhanger by the reactor coolant [g21d-5/08]

20
976/DIG.311

Liquid working medium partially heated by reactor and vaporized by heat source external to the core (e.g., with oil heating) [g21d-5/10]

0
976/DIG.312

Liquid working medium vaporized by reactor coolant [g21d-5/12]

5
976/DIG.313

And also superheated by reactor coolant [g21d-5/14]

2
976/DIG.314

Superheated by separate heat source [g21d-5/16]

2
976/DIG.307

Reactor and engine structurally combined (e.g., portable) [g21d-5/02]

12
976/DIG.318

Arrangements to provide heat for purposes other than conversion into power (e.g., for heating buildings) [g21d-9/00]

37
976/DIG.296

Control of nuclear power plant [g21d-3/00] *** (control of nuclear reaction in general dig. 113)

10
976/DIG.297

Manual control [g21d-3/02]

0
976/DIG.300

Regulation of any parameters in the plant [g21d-3/08]

17
976/DIG.301

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]

18
976/DIG.305

By adjustment of plant external to the reactor only in response to change in reactivity [g21d-3/18]

0
976/DIG.302

By adjustment of the reactor in response only to changes in engine demand [g21d-3/12]

11
976/DIG.303

Varying flow of coolant [g21d-3/14]

6
976/DIG.304

Varying reactivity [g21d-3/16]

5
976/DIG.298

Safety arrangements [g21d-3/04] *** (emergency protection of reactor dig. 139+)

45
976/DIG.299

Responsive to faults within the plant [g21d-3/06] *** (in the reactor dig. 139+)

15
976/DIG.113

Control of nuclear reaction [g21c-7/00]

44
976/DIG.117

By application of neutron-absorbing material (i.e., material with absorption cross section very much in excess of reflection cross section) [g21c-7/06]

10
976/DIG.130

By displacement of a fluid or fluent neutron-absorbing material (e.g., by adding neutron absorbing material to the coolant) [g21c-7/22]

15
976/DIG.118

By displacement of solid control elements (e.g., control rods) [g21c-7/08]

44
976/DIG.119

Construction of control elements [g21c-7/10]

39
976/DIG.124

Cluster or spider control rods [g21c-7/10f]

39
976/DIG.120

Control assemblies containing one or more absorbant as well as other elements (e.g., fuel or moderator elements) [g21c-7/10b]

11
976/DIG.121

Control elements adapted for pebble bed reactors [g21c-7/10c]

10
976/DIG.123

Control elements made of flat elements; control elements having cruciform cross section [g21c-7/10e]

19
976/DIG.122

Deformable control elements (e.g., flexible, telescopic or articulated) [g21c-7/10d]

7
976/DIG.129

Disposition of shock-absorbing devices; braking arrangements [g21c-7/20] *** (shock absorbers in general f16f)

14
976/DIG.125

Means for moving control elements to desired position [g21c-7/12]

74
976/DIG.127

Hydraulic or pneumatic drive [g21c-7/16]

25
976/DIG.126

Mechanical drive arrangements [g21c-7/14]

22
976/DIG.128

Means for obtaining differential movement of control elements [g21c-7/18]

6
976/DIG.131

Selection of substances for use as neutron-absorbing material [g21c-7/24]

7
976/DIG.132

By displacement of the moderator or parts thereof; by changing the moderator concentration [g21c-7/26]

8
976/DIG.133

Spectral shift control [g21c-7/26b]

22
976/DIG.135

By displacement of the reactor fuel or fuel elements [g21c-7/30]

14
976/DIG.134

By displacement of the reflector or parts thereof [g21c-7/28]

3
976/DIG.115

By using self-regulating properties of reactor materials (e.g., doppler effect) [g21c-7/02] *** (arrangements that involve temperature stability dig. 136)

2
976/DIG.116

Of burnable poisons [g21c-7/04]

29
976/DIG.137

By utilization of a primary neutron source [g21c-7/34]

3
976/DIG.136

By varying flow of coolant through the core; by adjusting the coolant or moderator temperature [g21c-7/32]

6
976/DIG.138

Control circuits [g21c-7/36]

47
976/DIG.114

Flux flattening [g21c-7/00b]

7
976/DIG.439

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)

235
976/DIG.187

Cooling arrangements within the pressure vessel containing the core; selection of specific coolants [g21c-15/00]

4
976/DIG.188

Arrangements or disposition of passages in which heat is transferred to the coolant; coolant flow control devices [g21c-15/02] *** (dig. 246 takes precedence); (coolant flow control through fuel assemblies (e.g., flow restrictors) dig. 60)

32
976/DIG.189

From fissile or breeder material [g21c-15/04] *** (dig. 59 takes precedence)

4
976/DIG.190

In fuel elements [g21c-15/06]

6
976/DIG.194

From headers; from joints in ducts [g21c-15/14]

3
976/DIG.191

From moderating material [g21c-15/08]

1
976/DIG.193

From pressure vessel; from containment vessel [g21c-15/12]

29
976/DIG.192

From reflector or thermal shield [g21c-15/10]

7
976/DIG.195

Comprising means for separating liquid and steam [g21c-15/16]

9
976/DIG.196

Emergency cooling arrangements; removing shut-down heat [g21c-15/18]

148
976/DIG.197

Partitions or thermal insulation between fuel channel and moderator [g21c-15/20]

1
976/DIG.199

Promoting flow of the coolant [g21c-15/24]

8
976/DIG.205

By convection (e.g., using chimneys, using divergent channels [g21c-15/26]

5
976/DIG.203

For gases (ventilators) [g21c-15/24d]

3
976/DIG.200

For liquids [g21c-15/24b]

15
976/DIG.201

For liquid metals [g21c-15/24b2]

28
976/DIG.202

Jet-pumps [g21c-15/24b4]

14
976/DIG.204

Heat-pipes [g21c-15/24f]

4
976/DIG.206

Selection of specific coolants; additions to the reactor coolants (e.g., against moderator corrosion) [g21c-15/28] *** (if serving as the moderator dig.105, compositions, per se, c09k-5/00; organic coolants dig. 106; purification and regeneration of the reactor coolants dig. 266)

7
976/DIG.198

Structural association of coolant tubes with headers [g21c-15/22]

4
976/DIG.375

Decontamination arrangements; treating radioactively contaminated material [g21f-9/00]

14
976/DIG.376

Decontamination of contaminated objects, apparatus, clothes, food; preventing contamination thereof [g21f-9/00b]

109
976/DIG.377

Recovery of isotopes from radioactive waste (e.g., fission products [g21f-9/00c]

32
976/DIG.378

Treating gases [g21f-9/02]

125
976/DIG.379

Treating liquids [g21f-9/04]

27
976/DIG.387

Disposal of liquid waste [g21f-9/20]

5
976/DIG.390

By dilution in water (e.g., in ocean, in stream) [g21f-9/26]

1
976/DIG.388

By storage in a tank or other container [g21f-9/22]

21
976/DIG.389

By storage in the ground; by storage underwater (e.g., in ocean) [g21f-9/24]

20
976/DIG.380

Processing [g21f-9/06]

76
976/DIG.383

By absorption; by adsorption; by ion exchange [g21f-9/12]

61
976/DIG.386

By biological processes [g21f-9/18]

4
976/DIG.381

By evaporation; by distillation [g21f-9/08]

59
976/DIG.385

By fixation in stable solid media [g21f-9/16]

207
976/DIG.382

By flocculation [g21f-9/10]

19
976/DIG.384

By incineration; by calcination (e.g., desiccation) [g21f-9/14]

48
976/DIG.391

Treating solids [g21f-9/28]

17
976/DIG.394

Disposal of solid waste [g21f-9/34]

121
976/DIG.395

By packaging; by baling [g21f-9/36]

72
976/DIG.392

Processing [g21f-9/30]

47
976/DIG.393

By incineration [g21f-9/32]

37
976/DIG.292

Details of nuclear power plant [g21d-1/00] *** (control dig. 296)

19
976/DIG.294

Arrangements of auxiliary equipment [g21d-1/02]

68
976/DIG.293

Nuclear facilities decommissioning arrangements [g21d-1/00b] *** (decontamination arrangements; treating radioactively contaminated material dig. 375+)

8
976/DIG.295

Pumping arrangements [g21d-1/04] *** (within the reactor pressure vessel dig. 199+; electrodynamic pumps h02k-44/02)

17
976/DIG.426

Detection arrangements for nuclear explosions [g21j-5/00] *** (individual measuring devices g01n)

6
976/DIG.139

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)

40
976/DIG.144

Against explosions (e.g., blast shields) [g21c-9/00f]

15
976/DIG.145

Against na- or ka- reactions [g21c-9/00i]

3
976/DIG.143

Core catchers [g21c-9/00d]

32
976/DIG.146

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) [g21c-9/02] *** (control elements, per se, dig. 113+)

32
976/DIG.148

By an absorbant fluid [g21c-9/02d]

7
976/DIG.147

By fast movement of a solid (e.g, pebbles) [g21c-9/02b]

26
976/DIG.149

Reactor fuses [g21c-9/02f]

4
976/DIG.150

Rupture diaphragms [g21c-9/02h]

1
976/DIG.151

Means for suppressing fires; earthquake protection [g21c-9/04]

23
976/DIG.140

Pressure suppression [g21c-9/00b]

28
976/DIG.141

By rupture discs or diaphragms [g21c-9/00b2]

5
976/DIG.142

By stream condensation or by thermal accumulation [g21c-9/00b4]

32
976/DIG.445

Gamma- or x-ray microscopes [g21k-7/00]

2
976/DIG.440

Irradiation devices [g21k-5/00] *** (discharge tubes for irradiating h01j-37/00)

5
976/DIG.441

Having no beam-forming means [g21k-5/02]

18
976/DIG.443

Holder for targets or for other objects to be irradiated [g21k-5/08]

17
976/DIG.442

With beam-forming means [g21k-5/04]

31
976/DIG.444

With provision for relative movement of beam source and object to be irradiated [g21k-5/10]

30
976/DIG.99

Moderator or core structure; selection of materials for use as moderator [g21c-5/00]

8
976/DIG.105

Characterized by composition (e.g., the moderator containing additional substances which ensure improved heat resistance of the moderator [g21c-5/12] *** (purification of fluid moderators during the operation of the reactor dig. 266)

4
976/DIG.107

Carbonic moderators [g21c-5/12g]

2
976/DIG.106

Moderators made of organic materials [g21c-5/12b]

0
976/DIG.108

Characterized by shape [g21c-5/14]

1
976/DIG.109

Shape of its constituent parts [g21c-5/16]

4
976/DIG.110

Characterized by the provision of more than one active zone [g21c-5/18]

8
976/DIG.111

Wherein one zone contains fissile material and another zone contains breeder material [g21c-5/20]

9
976/DIG.112

Wherein one zone is a superheating zone [g21c-5/22]

0
976/DIG.100

Details [g21c-5/02]

21
976/DIG.102

Means for locating or supporting fuel elements [g21c-5/06] *** (means forming part of the element dig. 48)

52
976/DIG.103

Means for preventing undesired asymmetric expansion of the complete structure (e.g., stretching devices, pins) [g21c-5/08]

26
976/DIG.104

Means for supporting the complete structure [g21c-5/10] *** (arrangements for supporting vessels and core structure dig. 168)

55
976/DIG.101

Spatial arrangements allowing for wigner growth [g21c-5/04]

4
976/DIG.207

Monitoring; testing; maintaining [g21c-17/00]

114
976/DIG.209

Detection of leaks [g21c-17/00c] *** (by testing the coolant or the moderator dig. 224)

22
976/DIG.215

Devices or arrangements for monitoring coolant or moderator [g21c-17/02]

12
976/DIG.224

Detecting burst slugs [g21c-17/04]

18
976/DIG.225

Characterized by (matrix) systems for checking the coolant channels [g21c-17/04b]

2
976/DIG.230

Characterized by a special construction of fuel elements (e.g., by a confined "tracer") [g21c-17/04h]

13
976/DIG.227

Detectors and metering devices for the detection of fission products [g21c-17/04f]

3
976/DIG.229

Detection and metering circuits [g21c-17/04f4]

1
976/DIG.228

Precipitation chambers [g21c-17/04f2]

0
976/DIG.226

Devices for selective sampling (e.g., valves, shutters, rotatable selector valves) [g21c-17/04d]

5
976/DIG.219

For monitoring gaseous coolants [g21c-17/02d]

5
976/DIG.216

For monitoring liquid coolants or moderators [g21c-17/02b]

23
976/DIG.217

For monitoring liquid metal coolants [g21c-17/02b2] *** (molten metal sampling in general g01n-1/12b)

17
976/DIG.218

Liquid metal leaks detection [g21c-17/02b2b] *** (detecting leaks in pipe-line systems in general f17d-5/00)

2
976/DIG.223

Moderator or coolant boiling detection [g21c-17/02m]

3
976/DIG.222

Moderator or coolant level detection devices [g21c-17/02k] *** (indicating or measuring liquid level in general g01f-23/00)

15
976/DIG.221

Reactor coolants flow measuring or monitoring [g21c-17/02h] *** (measuring volume or mass flow in general g01f)

13
976/DIG.220

Solid moderators testing (e.g., graphite) [g21c-17/02f]

0
976/DIG.231

Devices or arrangements for monitoring or testing fuel or fuel elements (e.g., for burn-up, for contamination, for leak-tightness) not during reactor operation [g21c-17/06] *** (dig. 235, dig. 236 take precedence) (detection of leaking fuel elements during reactor operation dig. 224)

118
976/DIG.233

Burn-up control [g21c-17/06d] *** (dig. 234 takes precedence)

3
976/DIG.234

Control of spherical elements [g21c-17/06f]

2
976/DIG.232

Leak-tightness control [g21c-17/06b] *** (dig. 234 takes precedence)

38
976/DIG.214

Inspection or maintenance of pipe-lines or tubes in nuclear installations [g21c-17/00f]

37
976/DIG.208

Mechanical simulators [g21c-17/00b] *** (electrical or magnetic simulators g06g-7/54)

6
976/DIG.243

Period meters [g21c-17/14]

5
976/DIG.210

Remote inspection of vessels (e.g., pressure vessels) [g21c-17/00d]

22
976/DIG.212

Inspection of inner surfaces of vessels [g21c-17/00d2]

32
976/DIG.211

Inspection of outer surfaces of vessels [g21c-17/00d1]

15
976/DIG.213

Inspection vehicles [g21c-17/00d3]

20
976/DIG.236

Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments (e.g., for measuring temperature) [g21c-17/10]

33
976/DIG.237

Measuring reactivity [g21c-17/10b]

5
976/DIG.238

Measuring the reactor flux within the reactor (e.g., within its pressure vessel) [g21c-17/10d]

55
976/DIG.239

Measuring the temperature [g21c-17/10e]

27
976/DIG.240

Passages and insulators for electric cables and for measuring purposes [g21c-17/10g]

24
976/DIG.242

Sensitive element forming part of control element [g21c-17/12]

23
976/DIG.241

The sensitive element being part of a fuel element or a fuel assembly [g21c-17/10s] *** (structural combination with a thermoelectric element for direct production of electrical energy dig. 84)

8
976/DIG.235

Structural combination of reactor core or moderator structure with viewing means (e.g., with television camera, periscope, window) [g21c-17/08]

11
976/DIG.423

Nuclear explosive devices; "atomic bombs") [g21j-1/00]

1
976/DIG.5

Nuclear reactors [g21c-1/00] *** (fusion reactors h05h-1/00; nuclear explosives dig. 423; analogue computers therefor g06g-7/54)

15
976/DIG.11

Fast fission reactors (i.e., reactors not using a moderator; metal cooled reactors; fast breeders) [g21c-1/02]

23
976/DIG.12

Characterized by the concept and properties of the core [g21c-1/02b]

4
976/DIG.13

Where the core is divided into zones with fuel and zones with breeding material [g21c-1/02b2]

9
976/DIG.14

Cooled by a not essentially pressurized coolant (e.g., tub type) [g21c-1/02d] *** (cooling arrangements dig. 187+)

78
976/DIG.15

Cooled by a pressurized coolant [g21c-1/02f] *** (cooling arrangements dig. 187+)

2
976/DIG.6

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]

3
976/DIG.8

Where the heat exchanger is disposed above the core [g21c-1/00b3]

22
976/DIG.9

Where the heat exchanger is disposed beneath the core [g21c-1/00b4]

1
976/DIG.10

Where the heat exchanger is disposed beside the core [g21c-1/00b5]

5
976/DIG.7

Where the prime mover is also placed in the vessel [g21c-1/00b2]

11
976/DIG.34

Subcritical reactors; experimental reactors with exception of swimming-pool reactors, zero-energy reactors [g21c-1/30]

3
976/DIG.35

Experimental and irradiation arrangements inside the reactor [g21c-1/30b] *** (irradiation loops dig. 36; material testing by neutrons g01n-23/00b)

11
976/DIG.36

Irradiation loops [g21c-1/30d]

0
976/DIG.16

Thermal reactors; epithermal reactors [g21c-1/04]

5
976/DIG.17

Heterogeneous reactors (i.e., in which the fuel and moderator are separated) [g21c-1/06]

0
976/DIG.19

Moderator being highly pressurized (e.g., boiling water reactor; integral super-heat reactor; pressurized water reactor) [g21c-1/08] *** (dig. 30 takes precedence)

22
976/DIG.22

Boiling water reactors [g21c-1/08e]

15
976/DIG.24

Moderator and coolant being different or separated [g21c-1/10]

6
976/DIG.25

Moderator being solid (e.g., magnox reactor, gas-graphite reactor [g21c-1/12]

7
976/DIG.20

Pressure regulating arrangements; "pressurizers" [g21c-1/08b]

17
976/DIG.23

Pressurized water reactors [g21c-1/08f]

10
976/DIG.21

Reactors where the coolant is overheated [g21c-1/08d]

0
976/DIG.26

Moderator being substantially not pressurized (e.g., swimming-pool reactor [g21c-1/14] *** (dig. 30 takes precedence)

2
976/DIG.27

Moderator and coolant being different or separated (e.g., sodium-graphite reactor, sodium-heavy water reactor, organic coolant-heavy water reactor) [g21c-1/16]

1
976/DIG.28

Coolant being pressurized [g21c-1/18]

0
976/DIG.29

Moderator being liquid (e.g., pressure-tube reactor, also the construction of the pressure-tubes) [g21c-1/20]

6
976/DIG.18

Pebble-bed reactors; reactors with granular fuel [g21c-1/06b]

49
976/DIG.30

Using fluid or fluent fuel [g21c-1/22] *** (with granular fuel dig. 18)

10
976/DIG.31

Homogeneous reactors (i.e., in which the fuel and moderator present an effectively homogeneous medium to the neutrons) [g21c-1/24]

0
976/DIG.32

Single-region reactors [g21c-1/26]

0
976/DIG.33

Two-region reactors [g21c-1/28]

0
976/DIG.424

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)

3
976/DIG.425

For excavation [g21j-3/02]

0
976/DIG.166

Pressure vessels; containment vessels [g21c-13/00] *** (chemical or physical processes b01j-3/00; pressure vessels in general f16j-12/00)

46
976/DIG.167

Details (e.g., seals, supporting constructions, ventillating arrangements, tube joints with a vessel wall) [g21c-13/02]

46
976/DIG.174

Arrangements for expansion and contraction [g21c-13/04]

8
976/DIG.175

Sealing plugs [g21c-13/06]

25
976/DIG.178

Closures for reactor-vessels (also rotatable) [g21c-13/06d]

53
976/DIG.179

Seals for closures or for rotatable closures [g21c-13/06d2]

18
976/DIG.176

For tubes (e.g., standpipes; locking-devices for the plugs included) [g21c-13/06b]

24
976/DIG.177

Seals for the plugs [g21c-13/06b2]

0
976/DIG.169

Seals (e.g., for pressure vessels or containers [g21c-13/02d]

34
976/DIG.170

For container apertures [g21c-13/02d2]

9
976/DIG.168

Supporting constructions for pressure vessels or containers [g21c-13/02b]

45
976/DIG.173

Tube crossings through a vessel wall [g21c-13/02h]

38
976/DIG.171

Tube joints with a vessel wall (e.g., taking into account thermal stresses) [g21c-13/02f]

15
976/DIG.172

Ventillating arrangements [g21c-13/02g]

5
976/DIG.186

Means for preventing contamination in the event of leakage (e.g., double wall) [g21c-13/10]

15
976/DIG.180

Vessels characterized by the material; selection of materials for pressure vessels [g21c-13/08]

13
976/DIG.183

Concrete vessels [g21c-13/08d]

17
976/DIG.184

Made of prestressed-concrete [g21c-13/08d2]

9
976/DIG.185

Particulars concerning pre-stressing devices (and cables) [g21c-13/08d2b]

5
976/DIG.181

Metallic vessels [g21c-13/08b]

21
976/DIG.182

Tube-type vessels (e.g., for not essentially pressurized coolants) [g21c-13/08b2]

4
976/DIG.403

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)

12
976/DIG.404

Neutron sources [g21g-4/02]

15
976/DIG.405

Radioactive sources other than neutron sources [g21g-4/04]

10
976/DIG.406

Characterized by constructional features [g21g-4/06]

4
976/DIG.407

Specially adapted for medical application [g21g-4/08]

20
976/DIG.408

With radium emanation [g21g-4/10]

0
976/DIG.37

Reactor fuel elements and their assemblies; selection of substances for use as reactor fuel elements [g21c-3/00]

4
976/DIG.58

Assemblies of number of fuel elements in the form of a rigid unit [g21c-3/30]

5
976/DIG.82

Assemblies of plate-shaped fuel elements or coaxial tubes [g21c-3/36]

11
976/DIG.59

Bundles of parallel pin-, rod-, or tube-shaped fuel elements [g21c-3/32]

52
976/DIG.68

Assembling the bundle; exchange of elements in the bundle [g21c-3/32l]

123
976/DIG.61

Coats and envelope surrounding the assembly [g21c-3/32c]

28
976/DIG.63

Comprising fuel-elements of various compositions; comprising other pin-, rod-, or tube-like forms [g21c-3/32g] *** (elements influencing the coolant flow dig. 60)

50
976/DIG.64

Special arrangements of elements in the assembly-lattice (e.g., fissile rods, fertile rods, water rods, poison rods, dummy-rods) [g21c-3/32g2]

48
976/DIG.62

Made of moderator-material [g21c-3/32d]

0
976/DIG.67

Means for the storage or removal of fission gases [g21c-3/32k] *** (means for the storage of fission gases in the elements dig. 50; means for the removal of fission gases from elements dig. 39+)

9
976/DIG.60

Means to influence the coolant flow through or around the assembly [g21c-3/32b] *** (dig. 246 takes precedence)

83
976/DIG.69

Spacer elements [g21c-3/32m] *** (spacer grids dig. 71)

5
976/DIG.70

Helicoidal spacer elements [g21c-3/32m2]

11
976/DIG.71

Spacer grids; other spacer devices [g21c-3/34]

24
976/DIG.72

Compact spacer grids (e.g., made of a plate or a blade) [g21c-3/34a]

4
976/DIG.81

Fabrication of spacer grids [g21c-3/34f]

33
976/DIG.80

Spacer grids formed by metallic wires (e.g., springs) [g21c-3/34e]

2
976/DIG.73

Spacer grids formed of assembled tubular elements [g21c-3/34b]

15
976/DIG.74

Spacer grids wherein each cell has a circular cross section; cells formed of assembled metallic nonintersecting strips [g21c-3/34c]

1
976/DIG.75

Spacer grids wherein each cell has a polygonal (e.g., square cross section) ; cells formed of assembled metallic nonintersecting strips [g21c-3/34d]

5
976/DIG.76

Polygonal cells formed of intersecting strips [g21c-3/34d2]

13
976/DIG.77

The cells being provided with fuel element supporting members [g21c-3/34d2a]

6
976/DIG.78

Supporting members formed only by deformations in the intersecting strips [g21c-3/34d2a2]

57
976/DIG.79

Supporting members formed only of elements fixed on the strips (e.g., by welding) [g21c-3/34d2a4]

18
976/DIG.65

Supporting or hanging the elements in the assembly [g21c-3/32h] *** (spacer grids dig. 71); means forming part of the assembly for inserting it into, or removing it from, the core; means for coupling adjacent assemblies (means forming part of the element for inserting it into, or removing it from, the core; or means for coupling adjacent elements dig. 49)

72
976/DIG.66

Supports for spacer grids [g21c-3/32h2]

20
976/DIG.38

Fuel elements [g21c-3/02] *** (manufacturing dig. 283)

4
976/DIG.39

Constructional details [g21c-3/04]

8
976/DIG.43

Casings; jackets; jacket materials [g21c-3/06]

24
976/DIG.46

End closures; means for tight mounting therefor [g21c-3/10]

31
976/DIG.47

Flattened end-closures [g21c-3/10b]

0
976/DIG.44

Jacket materials (e.g., alloys) [g21c-3/06b]

38
976/DIG.49

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]

2
976/DIG.48

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)

27
976/DIG.45

Provided with external means to promote heat-transfer (e.g., fins, baffles) [g21c-3/08]

1
976/DIG.50

Details of the construction within the casing [g21c-3/16]

40
976/DIG.52

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)

34
976/DIG.51

Means for storage or immobilization of gases in fuel elements [g21c-3/16b]

26
976/DIG.53

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]

50
976/DIG.41

Fuel elements comprising casings with a mass of granular fuel with coolant passages through them [g21c-3/04c]

3
976/DIG.42

Fuel elements with porous or capillary structure [g21c-3/04d]

2
976/DIG.40

Means for removal of gases from fuel elements [g21c-3/04b]

14
976/DIG.54

Elements with fissile or breeder material in contact with coolant [g21c-3/22]

1
976/DIG.55

Elements with fissile or breeder material in fluid form within a nonactive casing [g21c-3/24]

1
976/DIG.56

Elements with fissile or breeder material in powder form within a nonactive casing [g21c-3/26] *** (dig. 57 takes precedence)

1
976/DIG.57

Elements with fissile or breeder material in solid form within a nonactive casing [g21c-3/28]

19
976/DIG.83

Fuel units consisting of a single fuel element in a supporting sleeve or in another supporting element [g21c-3/38]

0
976/DIG.85

Selection of substances for use as reactor fuel [g21c-3/42]

0
976/DIG.86

Fluid or fluent reactor fuel [g21c-3/44]

0
976/DIG.87

Aqueous compositions [g21c-3/46]

0
976/DIG.89

Suspensions of the active constituent; slurries [g21c-3/50]

0
976/DIG.88

True or colloidal solutions of the active constituent [g21c-3/48]

0
976/DIG.91

Fused salt, oxide or hydroxide compositions [g21c-3/54]

0
976/DIG.92

Gaseous compositions; suspensions in a gaseous carrier [g21c-3/56]

0
976/DIG.90

Liquid metal compositions [g21c-3/52]

0
976/DIG.93

Solid reactor fuel; pellets made of fissile material [g21c-3/58]

7
976/DIG.95

Ceramic fuel [g21c-3/62]

25
976/DIG.98

Ceramic dispersion fuel (e.g., cermet) [g21c-3/64]

13
976/DIG.97

Coated fuel particles [g21c-3/62j]

33
976/DIG.96

Oxide fuels [g21c-3/62b]

91
976/DIG.94

Metallic fuel; intermetallic dispersions [g21c-3/60]

7
976/DIG.84

Structural combination of fuel element with thermoelectric element for direct production of electric energy from fission heat; or with another arrangement for direct production of electric energy (e.g., a thermionic device) [g21c-3/40] *** (temperature measurement dig. 236; combination with thermoelements for temperature measurements dig. 241)

2
976/DIG.152

Sheilding structurally associated with the reactor [g21c-11/00]

5
976/DIG.153

Biological sheilding; neutron and gamma shielding [g21c-11/02] *** (in general dig. 319+)

18
976/DIG.157

Characterized by the form or by the material [g21c-11/02f]

11
976/DIG.156

In apertures or channels through a wall [g21c-11/02d]

4
976/DIG.154

Inside the reactor vessel [g21c-11/02b]

4
976/DIG.155

Structurally combined with the casing [g21c-11/02b2]

5
976/DIG.158

On waterborne craft [g21c-11/04]

0
976/DIG.159

Reflecting shields (i.e., for minimizing loss of neutrons) [g21c-11/06]

31
976/DIG.160

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]

24
976/DIG.164

Consisting of a combination of nonmetallic and metallic layers (e.g., metal-sand-metal-concrete) [g21c-11/08e]

5
976/DIG.161

Consisting of a nonmetallic layer of insulating material [g21c-11/08b]

11
976/DIG.165

Consisting of a stagnant or a circulating fluid [g21c-11/08f]

24
976/DIG.162

Consisting of one or more metallic layers [g21c-11/08d]

8
976/DIG.163

Consisting exclusively of several metallic layers [g21c-11/08d2]

24
976/DIG.355

Shielded cells or rooms [g21f-7/00]

15
976/DIG.359

Observation devices permitting vision but shielding the observer (e.g., window, periscope) [g21f-7/02]

2
976/DIG.360

Windows (e.g., shielded) [g21f-7/02b]

4
976/DIG.358

Room atmosphere, temperature or pressure control devices [g21f-7/00c] *** (glove-boxes dig. 364)

1
976/DIG.361

Shielded glove-boxes [g21f-7/04]

4
976/DIG.363

Glove mounting means [g21f-7/04c]

6
976/DIG.364

Glove-box atmosphere, temperature or pressure control devices [g21f-7/04d] *** (in general dig. 358)

3
976/DIG.365

Lighting [g21f-7/04f]

0
976/DIG.362

Shielded passages through walls; locks; closing or transferring means between glove-boxes [g21f-7/04b] *** (in general dig. 356)

7
976/DIG.366

Transportable glove-boxes [g21f-7/04g]

0
976/DIG.356

Shielded passages through walls; locks; transferring devices between rooms [g21f-7/00b] *** (between glove-boxes dig. 362)

35
976/DIG.357

Transferring by fluidic means [g21f-7/00b2]

0
976/DIG.367

Structural combination with remotely controlled apparatus (e.g., with manipulators) [g21f-7/06]

16
976/DIG.368

Integrated manipulators [g21f-7/06b]

3
976/DIG.369

Mounted in a wall (e.g., pivotably mounted) [g21f-7/06b2]

4
976/DIG.371

Remotely manipulated machinery [g21f-7/06d]

6
976/DIG.370

Remotely manipulated measuring or controlling devices [g21f-7/06c] *** (combined with window dig. 359)

1
976/DIG.372

Remotely manipulated tools [g21f-7/06f]

6
976/DIG.374

Remotely manipulating devices for fluids [g21f-7/06h]

1
976/DIG.373

Transferring devices within cells or boxes [g21f-7/06g] *** (between cells dig. 356, 362)

5
976/DIG.335

Shielding characterized by its physical form (e.g., granules or shape of the material) [g21f-3/00]

32
976/DIG.340

Bricks; shields made up therefrom [g21f-3/04]

12
976/DIG.336

Clothing [g21f-3/02]

11
976/DIG.338

Aprons [g21f-3/02c]

7
976/DIG.337

Clothing surrounding the wearer completely [g21f-3-02b]

4
976/DIG.339

Gloves [g21f-3/02d] *** (mounting means on glove boxes dig. 363)

1
976/DIG.319

Shielding characterized by the composition of the materials [g21f-1/00]

7
976/DIG.333

Laminated shielding materials [g21f-1/12]

8
976/DIG.334

Comprising metals [g21f-1/12b]

12
976/DIG.320

Selection of uniform shielding materials [g21f-1/02]

4
976/DIG.327

Ceramics; glasses; refractories [g21f-1/06] *** (cermets dig. 328)

10
976/DIG.323

Concretes; other hydraulic hardening materials [g21f-1/04]

1
976/DIG.324

Combined with other materials dispersed in the carrier [g21f-1/04b]

2
976/DIG.326

With metals [g21f-1/04b4]

3
976/DIG.325

With organic substances [g21f-1/04b2]

1
976/DIG.321

Liquids [g21f-1/02b]

7
976/DIG.328

Metals; alloys; cermets (i.e., sintered mixtures of ceramics and metals) [g21f-1/08]

15
976/DIG.329

Heavy metals or alloys [g21f-1/08b]

5
976/DIG.330

Organic substances; dispersions in organic carriers [g21f-1/10]

17
976/DIG.331

Dispersions in organic carriers [g21f-1/10b]

11
976/DIG.332

Metallic dispersions [g21f-1/10b2]

9
976/DIG.322

Semi-liquids, gels, pastes [g21f-1/02c]

0
976/DIG.341

Transportable or portable shielded containers [g21f-5/00]

17
976/DIG.349

Closures for containers or corresponding sealing arrangements [g21f-5/00j]

56
976/DIG.342

Containers for fluid wastes [g21f-5/00a]

11
976/DIG.343

Containers for solid radioactive wastes (e.g., ultimate disposal containers) [g21f-5/00b] *** (dig. 347 takes precedence)

56
976/DIG.344

Containers for fuel elements [g21f-5/00b2]

34
976/DIG.345

Fuel element racks in the container [g21f-5/00b2b]

26
976/DIG.347

Containers provided with a rotatable drum [g21f-5/00f]

1
976/DIG.350

For storing radioactive sources (e.g., source carriers for irradiation units); radio isotope containers [g21f-5/00l]

27
976/DIG.351

Syringe shields and holders [g21f-5/00l2]

18
976/DIG.346

Shock absorbers, specially adapted therefor (e.g., impact buffers for containers) [g21f5-00d]

12
976/DIG.352

Specially adapted containers or shipping cask handling devices (e.g., transporting devices) [g21f-5/00n]

20
976/DIG.348

Specially adapted heat removal systems (e.g., by a circulating fluid or by cooling fins.); specially adapted protection against external fire [g21f-5/00h]

38
976/DIG.353

With provision for restricted exposure of a radiation source within the container [g21f-5/02]

16
976/DIG.354

Means for controlling exposure (e.g., time, size of aperture) [g21f-5/04]

12
 
 
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