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Class Information
Number: 376
Name: Induced nuclear reactions: processes, systems, and elements >
Description: This class provides for patents directed to processes involving induced nuclear reactions and structures which implement such processes.










Class Number Class Name No. of Patents
376/913

Antimatter devices and methods

13
376/317

Combined

58
376/322

For storing excess energy

20
376/323

With chemical reaction

25
376/324

To produce a combustible fuel

30
376/325

Cracking of hydrocarbons

14
376/320

With direct conversion means

24
376/321

Thermionic

26
376/326

With laser

27
376/318

With propulsion means

33
376/319

Gaseous core

12
376/327

Control component for a fission reactor

211
376/335

Flexible control element

22
376/336

Fuse actuated devices

51
376/337

Particulate type

10
376/331

Gaseous control component

9
376/328

Liquid control component

54
376/330

Liquid metal control component

4
376/329

With vaporization

7
376/339

Nonconventional control material

98
376/338

Particulate type (e.g., balls)

22
376/332

Telescopic control devices

6
376/333

Wherein concentration of the reactivity affecting material varies radially or axially of the control element

90
376/334

By utilizing a follower

5
376/153

Detection of radiation by an induced nuclear reaction

85
376/154

By fission

47
376/155

With boron

11
376/918

Entire reactor core of single integral structure

3
376/346

Epi-thermal reactor structures (e.g., intermediate neutron spectrum)

16
376/308

Fission reactor material (including reaction products) treatment

58
376/310

Impurity removal

314
376/312

By cold traps or hot traps

36
376/313

By filters, ion exchangers, or absorbers

300
376/315

Electrostatic or magnetic filters

23
376/314

Gas filters (e.g., adsorbers)

124
376/316

By pressurized fluid (i.e., blowdown)

104
376/311

Reprocessing of fuel during reactor operation

19
376/309

Post accident impurity or contaminant removal

66
376/409

Fuel component structure

106
376/412

Encased with nonfuel component

75
376/419

Burnable poison

129
376/414

Coated, preformed, or impregnated layer or part or adhesively bonded layers or parts

103
376/415

Lubricating layer

18
376/416

Multiple or composite cladding-type layers

120
376/417

Including getter layer or barrier layer

86
376/424

Coolant or heat exchange material

11
376/418

Getter, fission product retainer of filter

69
376/425

Heat insulating material

10
376/421

Homogeneously intermixed

43
376/422

Alloyed fuel

20
376/420

Interpellet spacing or positioning means

36
376/423

Moderator or reflector

24
376/413

With internal pressurizer

8
376/453

Fuel support or covering provided with fins, projections, prongs, etc.)

32
376/454

With external fins, projections, prongs, etc.

42
376/451

Having particular end closure or seal (e.g., weld, plug, cap, etc.)

117
376/452

With indexing means

12
376/455

Hollow, annular, or graduated fuel layers or members (e.g., concentric, helical, etc.)

34
376/457

Nonconventional jacket or can material

145
376/426

Plural fuel segments or elements

47
376/429

Complementary segments within same container

16
376/431

Concentric cylindrical elements

12
376/434

In pack or bundle

191
376/449

Having provision or structure for insertion of control elements therein

94
376/437

Having the fuel element ends positioned on or attached to rails

15
376/438

Including grid

269
376/440

For ends of fuel elements

83
376/439

With coolant flow path deflecting means

201
376/442

With fuel element contacting protuberance or projection

249
376/441

With nonintegral fuel element contacting means

122
376/447

Including separate burnable poison or moderator

77
376/435

Wherein the fissile content varies radially or axially across the pack or bundle

161
376/436

Wire-wrapped fuel elements

26
376/443

With coolant flow path deflecting means

182
376/444

With coolant flow bypass means

176
376/448

With means for spacing apart adjacent packs or bundles

102
376/446

With removable member

235
376/445

With thermal expansion compensating means

52
376/427

In solid moderator block

33
376/432

Plate-type fuel elements

22
376/430

Spherically shaped segments within same container

8
376/433

Stacked (e.g., candu type reactor fuel components)

35
376/428

Wherein the fissile content varies radially or axially within the same container (e.g., plural fuel layers)

80
376/411

Spherical particles

60
376/456

Vented fuel

32
376/450

With condition sensing or indicating means

44
376/410

With means to prevent thinning of the cladding (e.g., amoeba effect)

13
376/915

Fusion reactor fuels

19
376/462

Grids

152
376/260

Handling of fission reactor component structure within reactor system

812
376/261

Fuel component

467
376/264

Charging or discharging of fuel

101
376/265

Refueling ball-type reactors

21
376/266

Means for separating low exposure from high exposure elements

9
376/267

Refueling schemes, patterns, or fuel cycles (e.g., in/out systems)

105
376/262

Including handling of a second different, diverse reactor component (e.g., control element, moderator element, vessel cover removal)

115
376/263

With pressure vessel cover removal

64
376/268

Refueling machines

100
376/271

Upper axial transfer

76
376/269

With magazine

31
376/270

With nonaxial transfer capability

43
376/272

Storage container systems for new and/or irradiated core elements

689
376/916

Methods of making fusion fuel targets

55
376/463

Miscellaneous

177
376/909

Mobile reactors

23
376/458

Moderator or reflector component structure for a fission reactor

52
376/459

With means for keying or assembling moderator blocks together

20
376/914

Nuclear explosives

13
376/100

Nuclear fusion

68
376/150

Chamber structure or material

68
376/107

Fusion reaction by plural colliding plasmas or particle beams

72
376/151

Fusion targets or pellets

24
376/152

For inertial confinement

63
376/108

Including accelerating particles into a stationary or static target (e.g., cockcroft-walton generator type)

48
376/112

Cyclotron type acceleration of nuclei

12
376/114

Self-contained neutron sources (e.g., neutron or accelerator tube)

37
376/115

With cooled electrodes or target

11
376/116

With ion beam collimator or filtering structure (e.g., extractor electrode)

14
376/118

Subterranean sources

8
376/119

With control circuitry

17
376/113

With electrostatic voltage generating means

8
376/117

With ion beam collimator or filtering structure

10
376/110

With means for modifying the resultant neutron output, e.g., moderator means

18
376/111

With means to pulsate ion beam

9
376/109

With target replenishing

14
376/120

Including bunched particle beam

13
376/146

Including removal or use of impurities or reaction products (e.g., energy)

135
376/147

Direct conversion of energy

42
376/148

Including use of heat or radiation to effect a chemical reaction

26
376/102

Inertial confinement (e.g., nuclear explosive)

22
376/105

Particle beam irradiation (excluding photons)

36
376/106

Ion beam irradiation

27
376/103

Photon beam (e.g., laser) irradiation

24
376/104

Optics

54
376/121

Magnetic confinement of plasma

26
376/131

Auxiliary heating

7
376/132

Electromagnetic wave energy

21
376/125

Imploding liners

19
376/139

Linear confinement

14
376/140

Mirror devices

23
376/141

Plasma formed or contained between spaced electrodes

7
376/142

Magnetic structure

70
376/122

Plasma formed in situ by laser

10
376/123

Principal heating by wave energy

26
376/124

Heating by time varying magnetic field (e.g., by compression)

7
376/133

Toroidal confinement of plasma

69
376/138

Bumpy torus

3
376/134

Divertors

19
376/135

Effuser

6
376/136

Limiters or liners

40
376/137

With solid internal conductor

14
376/143

With circuitry

72
376/126

With enveloping charged particle confinement (e.g., e or p layer)

7
376/127

With injection of electrically charged or accelerated particles

64
376/129

Negatively charged particle injection

24
376/130

Neutral particle injection

50
376/128

Plasma injection

28
376/101

Pellet guidance systems (e.g., pellet injection means)

19
376/144

Plasma formed between spaced electrodes

36
376/145

Plasma focus

18
376/149

Shock wave heating of plasma or gas (e.g., mhd heating)

12
376/912

Nuclear reactor systems situated in the ocean

17
376/156

Nuclear transmutation (e.g., by means of particle or wave energy)

94
376/190

By charged particle bombardment

62
376/196

Alpha (helium nucleus) bombardment

11
376/197

Wherein the reaction product is an actinide or transuranium element

5
376/198

With reaction product treatment (e.g., recovery, separation)

16
376/191

Alpha-neutron sources

12
376/199

Deuteron bombardment

21
376/200

Wherein the reaction product is an actinide or transuranium element

4
376/201

With reaction product treatment (e.g., recovery, separation)

22
376/194

Proton bombardment

57
376/195

With reaction product treatment (e.g., recovery, separation)

70
376/192

To produce spallation reactions

25
376/193

To produce fissile isotopes

6
376/158

By neutron bombardment

86
376/170

Actinides

31
376/171

Breeder or converter reactor structures

32
376/179

Coolant manipulated and used exterior of reactor core

3
376/172

Fertile fuel assembly structure or arrangement

34
376/173

Having internal fertile regions

37
376/178

Fuel assembly holddown or support

6
376/174

Having particular coolant fluid flow path or pattern within reactor core

8
376/175

Orifice or fluid control at inlet or outlet of coolant channels

14
376/176

Hydraulic holddown

1
376/177

Plural coolant loops or passes through reactor core

2
376/182

Formation of plutonium isotopes

7
376/180

Formation of uranium isotopes

5
376/181

Uranium 233

8
376/185

Alkali and alkaline elements

9
376/183

Doping of semiconductors

25
376/168

Halogens

5
376/169

Iodine

13
376/187

Lead, polonium, bismuth

4
376/186

Molybdenum, technetium

24
376/159

Neutron activation analysis

218
376/160

Subterranean

15
376/161

Specific nuclides

10
376/165

Hydrogen, chlorine

15
376/162

Metals

15
376/163

Aluminum, silicon

9
376/164

Uranium

7
376/166

Oxygen, carbon

31
376/167

With tracer injection

5
376/184

Rare earths

8
376/188

Sulfur, phosphorus

2
376/189

With reaction product treatment (e.g., recovery, separation)

60
376/157

Gamma or charged particle activation analysis

71
376/202

Irradiation capsule, holder, or support

70
376/900

Particular material or material shapes for fission reactors

111
376/901

Fuel

50
376/903

Shapes

11
376/902

With external lubricating or absorbing material

11
376/904

Moderator, reflector, or coolant materials

34
376/907

Dissociative coolants

4
376/906

Metal

14
376/905

Organic

4
376/911

Plural reactor systems

14
376/908

Reactor geometry (or part thereof) defined in terms of numerical values

7
376/277

Reactor protection or damage prevention

183
376/298

Auxiliary heat removal structure

172
376/299

Decay heat removal

191
376/278

By minimizing positive coolant void coefficient

3
376/280

Core catchers

80
376/302

Core restraint means

86
376/304

For moderator structures

10
376/303

In-core restraint means

14
376/305

Corrosion or damage prevention

222
376/306

By addition of material to coolant

153
376/282

Emergency core coolant systems (e.g., injecting coolant into reactor or pipe systems)

213
376/285

Expansion means (e.g., shock absorbers, roller bearings)

220
376/286

Pipe expansion joints

54
376/279

Fire extinguishing or prevention

13
376/281

Fluid flow reversal protection

33
376/283

Pressure suppression and relief

206
376/284

By fusible means (e.g., ice)

28
376/300

Recombiners

34
376/301

Catalytic

65
376/287

Shield or barrier between radiation or heat source and object to be protected (e.g., insulation, thermal shield)

212
376/292

Concentric tubes or conduits

97
376/293

Containment structures

174
376/294

Pressure vessels

100
376/295

Concrete

24
376/296

Prestressed

44
376/288

Particular materials

57
376/289

Thermal insulation

85
376/291

Concentric tubes or conduits with insulation

36
376/290

For liquid metal cooled fast reactors (e.g., insulation for vault roof, or for the vessel walls as by a layer of stagnant or quasi-stagnant coolant)

80
376/307

With pressurizer means

68
376/297

With turbine protection means (e.g., turbine trip or overspeed protection means)

12
376/340

Reactor structures with testing or irradiation facilities

21
376/341

With material holder or support positioned outside the radiation source

13
376/342

With provision for insertion of material to be irradiated into the radiation means

18
376/344

By fluid pressure

2
376/345

Wherein the fluid is a liquid

0
376/343

Flux trap reactor structures

3
376/347

Reactor structures

67
376/361

Circulating fluid within reactor

64
376/383

Fluid is a gas

14
376/385

Having specified flow path or pattern within reactor core

8
376/387

Plural passes through core

4
376/388

Re-entrant type

1
376/386

Plural separate loops

5
376/389

With particular flow directing or diverting means (e.g., flow baffle)

18
376/390

With core bypass means (e.g., passage along core barrel or through shield structure)

9
376/391

Manipulated or used exterior of the reactor core

63
376/393

With coaxial flow

15
376/392

With jet pump

18
376/394

With single structure component containment (e.g., pod arrangement)

23
376/384

Wherein the gas is steam

1
376/362

Fuel assembly supports

66
376/364

Fuel assembly holddown or locking means

114
376/365

Hydraulic or pneumatic

15
376/363

Suspended fuel assembly

11
376/395

Having specified fluid flow path or pattern within reactor core

24
376/401

One-fluid-type pressure tube reactor

6
376/397

Plural passes

7
376/398

Re-entrant type

3
376/396

Plural separate coolant loops through reactor core

5
376/399

With particular flow directing or diverting means (e.g., flow baffle)

79
376/400

With core bypass means (e.g., passage along core barrel or through shield structure)

33
376/402

Manipulated or used exterior of reactor core

179
376/406

Compact or integral (e.g., heat exchanger, core, pumps in same vessel)

55
376/403

Including tank, pool, or reservoir (e.g., swimming pool)

33
376/404

Having reactor core and heat exchanger or pump therein

73
376/405

With particular heat exchanger structure

74
376/407

With jet pumps

48
376/408

With means or structure to flash coolant into vapor

4
376/381

Pebble bed reactor

88
376/382

Having core of separate pebble containers

9
376/366

Plural fluids or a fluid in plural phases circulating within reactor (e.g., pressure tube reactors)

25
376/367

In heat pipe means

43
376/368

Including chemically distinct gas

14
376/369

With formation, separation, or manipulation of a second gas

3
376/370

With formation, separation, or manipulation of a vapor (e.g., boiling water reactor (bwr) type)

65
376/373

Having specified fluid flow path or pattern within reactor core

23
376/374

Plural separate coolant loops through reactor core

7
376/377

With particular flow directing or diverting means (e.g., flow baffle)

49
376/375

With plural, coolant passes through reactor core

1
376/376

Re-entrant type

5
376/380

Nonaqueous vapor

2
376/378

Vapor manipulated or used exterior of reactor core

7
376/379

With flow control of fluid within reactor

16
376/372

With jet pump

71
376/371

With vapor-liquid separating means

58
376/348

Fast thermal composite core

5
376/349

Flux flattening

27
376/354

Fuel material in contact with and supported by fluid

3
376/355

Fluidized beds

7
376/356

Fuel dispersed in liquid moderator, solution, etc.

3
376/357

Vapor forming, separating, or manipulating

1
376/358

With particular in situ reconstitution or modification of fuel moderator material

5
376/359

Fuel in molten state or in molten vehicle

8
376/360

Fuel in form of fused salt

9
376/350

Moderator component varies in its effective density or materials

6
376/351

Spaced internal reflectors or moderators

11
376/352

Orifice or fluid control at inlet or outlet of coolant channels

249
376/353

With particular control rod guide structure

165
376/460

Rotating plug-type cover

27
376/910

Rotating reactors

4
376/203

Seal arrangements

309
376/205

Between pressure vessel cover and vessel or portion thereof

86
376/206

Rotating plug-type cover

42
376/204

For nozzle

105
376/273

Subterranean reactor structures (e.g., underground containment, underground explosive)

40
376/275

For extracting materials or energy from the earth

4
376/276

In the form of heated water or steam

5
376/274

For minimizing radioactive contamination within an underground chamber or of the material removed therefrom

11
376/245

Testing, sensing, measuring, or detecting a fission reactor condition

655
376/259

By particular instrumentation circuitry

192
376/246

Flowmeters

71
376/254

Flux monitoring

223
376/255

Directly generating electrical signal (e.g., ion detection)

83
376/257

Fuel assay (e.g., burnup)

70
376/256

Gas sensors (e.g., hydrogen detectors)

63
376/250

Leak detection

125
376/251

Fuel element leak detection

79
376/252

By acoustic or ultrasonic wave energy

125
376/253

By the detection of fission products external to the fuel element

90
376/248

Optics

149
376/258

Position detection

254
376/247

Temperature or pressure measurement

214
376/249

Vessel monitoring or inspection

312
376/917

Utilizing different fuels or fuels in different forms, in different reactor regions in relation to amounts of heat produced in said regions

8
376/461

Vessel support (e.g., core vessel supports)

125
376/207

With control of reactor (e.g., control of coolant flow)

53
376/212

By altering quantity of characteristic of fuel within critical area

14
376/213

Wherein control element includes a fissile material

8
376/210

By coolant flow

103
376/211

Exterior of core (e.g., secondary loop control)

56
376/215

By electronic signal processing circuitry (e.g., plural redundant circuits)

129
376/216

Plural sensed different conditions or measured variables correlated

204
376/217

Control programs

130
376/218

Xenon control

16
376/219

By movement of control element or by release of neutron absorbing material

95
376/232

By motion transforming means, e.g., rack and pinion

24
376/227

Control element movable by means of cable and winch, chains or reels

10
376/224

Finger-type control elements (insertable into fuel element positions)

22
376/225

Including shock absorber

23
376/236

Including control rod insertion and removal schemes

59
376/237

Group movement of control elements

35
376/238

Setback

15
376/234

Including shock absorber

44
376/235

Means for locking control element in desired position

32
376/233

Releasable coupling

84
376/239

Rod or support carrying plural elements or diverse materials

18
376/223

Rotatable control elements

16
376/226

Wherein control element is driven directly into bed of fuel elements

15
376/228

Wherein driver or motivating is electric

41
376/229

Electrofluidic

12
376/230

Wherein driver or motivating is fluid

61
376/231

Pneumatic

9
376/220

Wherein the control element is a reflector or moderator material

37
376/221

Variable fluent reflector/moderator level or density

29
376/222

Moderator dump

2
376/242

Means to inhibit control rod movement

44
376/241

Power output control (e.g., load follows with steam dump)

58
376/208

Pulsed reactors

10
376/214

Reactor start-up

37
376/240

Sensing or detecting device attached to, embedded in, or integral with control element

18
376/209

Spectral shift

54
376/244

Temperature reactivity control

17
376/243

With cooling of control element

20
 
 
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