|  | G |
SECTION G — PHYSICS

|  | G |
Note(s) In this section, the following term is used with the meaning indicated: "variable" (as a noun) means a feature or property (e.g., a dimension, a physical condition such as temperature, a quality such as density or colour) which, in respect of a particular entity (e.g., an object, a quantity of a substance, a beam of light) and at a particular instant, is capable of being measured; the variable may change, so that its numerical expression may assume different values at different times, in different conditions or in individual cases, but may be constant in respect of a particular entity in certain conditions or for practical purposes (e.g., the length of a bar may be regarded as constant for many purposes). Attention is drawn to the definitions of terms or expressions used, appearing in the notes of several of the classes in this section, in particular those of "measuring" in class Fulltext... Hierarchy... Expanded...G01 and "control" and "regulation" in class Fulltext... Hierarchy... Expanded...G05. Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable extent on differences in the intention of the user rather than on any constructional differences or differences in the manner of use, and because the subjects dealt with are often in effect systems or combinations, which have features or parts in common, rather than "things", which are readily distinguishable as a whole. For example, information (e.g., a set of figures) may be displayed for the purpose of education or advertising (Fulltext... Hierarchy... Expanded...G09), for enabling the result of a measurement to be known (Fulltext... Hierarchy... Expanded...G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (Fulltext... Hierarchy... Expanded...G08). The words used to describe the purpose depend on features that may be irrelevant to the form of the apparatus concerned, for example, such features as the desired effect on the person who sees the display, or whether the display is controlled from a remote point. Again, a device which responds to some change in a condition, e.g., in the pressure of a fluid, may be used, without modification of the device itself, to give information about the pressure (Fulltext... Hierarchy... Expanded...G01L) or about some other condition linked to the pressure (another subclass of class Fulltext... Hierarchy... Expanded...G01, e.g., Fulltext... Hierarchy... Expanded...G01K for temperature), to make a record of the pressure or of its occurrence (Fulltext... Hierarchy... Expanded...G07C), to give an alarm (Fulltext... Hierarchy... Expanded...G08B), or to control another apparatus (Fulltext... Hierarchy... Expanded...G05). The classification scheme is intended to enable things of a similar nature (as indicated above) to be classified together. It is therefore particularly necessary for the real nature of any technical subject to be decided before it can be properly classified.

NUCLEONICS

|  | G21 |
NUCLEAR PHYSICS; NUCLEAR ENGINEERING

|  | G21F |
PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION, OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means Fulltext... Hierarchy... Expanded...A61K 7/40; in cosmonautic vehicles Fulltext... Hierarchy... Expanded...B64G; combined with a reactor Fulltext... Hierarchy... Expanded...G21C 11/00; combined with X-ray tubes Fulltext... Hierarchy... Expanded...H01J 35/16; combined with X-ray apparatus Fulltext... Hierarchy... Expanded...H05G 1/02)

|  | G21F 1/00 |
Shielding characterised by the composition of the material

|  | G21F 1/02 |
· | Selection of uniform shielding materials

|  | G21F 1/04 |
· · | Concretes; Other hydraulic hardening materials

|  | G21F 1/06 |
· · | Ceramics; Glasses; Refractories (cermets Fulltext... Hierarchy... Expanded...G21F 1/08)

|  | G21F 1/08 |
· · | Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals

|  | G21F 1/10 |
· · | Organic substances; Dispersions in organic carriers

|  | G21F 1/12 |
· | Laminated shielding materials

|  | G21F 3/00 |
Shielding characterised by its physical form, e.g. granules, or shape of the material

|  | G21F 3/02 |
· | Clothing (protective garments in general Fulltext... Hierarchy... Expanded...A41D 13/00)

|  | G21F 3/025 |
· · | Clothing completely surrounding the wearer [5]

|  | G21F 3/03 |
· · | Aprons [5]

|  | G21F 3/035 |
· · | Gloves (mounting means on glove boxes Fulltext... Hierarchy... Expanded...G21F 7/053) [5]

|  | G21F 3/04 |
· | Bricks; Shields made up therefrom

|  | G21F 5/00 |
Transportable or portable shielded containers

|  | G21F 5/002 |
· | Containers for fluid radioactive wastes [5]

|  | G21F 5/005 |
· | Containers for solid radioactive wastes, e.g. for ultimate disposal [5]

|  | G21F 5/008 |
· · | Containers for fuel elements [5]

|  | G21F 5/012 |
· · · | Fuel element racks in the containers [5]

|  | G21F 5/015 |
· | for storing radioactive sources, e.g. source carriers for irradiation units; Radioisotope containers [5]

|  | G21F 5/018 |
· · | Syringe shields or holders (syringe shielding for applying radioactive material to the body Fulltext... Hierarchy... Expanded...A61M 36/08) [5]

|  | G21F 5/02 |
· | with provision for restricted exposure of a radiation source within the container

|  | G21F 5/04 |
· · | Means for controlling exposure, e.g. time, size of aperture (controlling exposure to X-radiation Fulltext... Hierarchy... Expanded...H05G 1/30)

|  | G21F 5/06 |
· | Details of, or accessories to, the containers [5]

|  | G21F 5/08 |
· · | Shock-absorbers, e.g. impact buffers for containers [5]

|  | G21F 5/10 |
· · | Heat-removal systems, e.g. using circulating fluid or cooling fins [5]

|  | G21F 5/12 |
· · | Closures for containers; Sealing arrangements [5]

|  | G21F 5/14 |
· · | Devices for handling containers or shipping-casks, e.g. transporting devices [5]

|  | G21F 7/00 |
Shielded cells or rooms (chambers provided with manipulating devices in general Fulltext... Hierarchy... Expanded...B25J)

|  | G21F 7/005 |
· | Shielded passages through walls; Locks; Transferring devices between rooms (between glove-boxes Fulltext... Hierarchy... Expanded...G21F 7/047) [5]

|  | G21F 7/01 |
· · | Transferring by fluidic means [5]

|  | G21F 7/015 |
· | Room atmosphere, temperature or pressure control devices [5]

|  | G21F 7/02 |
· | Observation devices permitting vision but shielding the observer

|  | G21F 7/03 |
· · | Windows, e.g. shielded [5]

|  | G21F 7/04 |
· | Shielded glove-boxes (glove-boxes in general Fulltext... Hierarchy... Expanded...B25J 21/02)

|  | G21F 7/047 |
· · | Shielded passages; Closing or transferring means between glove-boxes [5]

|  | G21F 7/053 |
· · | Glove mounting means [5]

|  | G21F 7/06 |
· | Structural combination with remotely-controlled apparatus, e.g. with manipulators (manipulators Fulltext... Hierarchy... Expanded...B25J; remote control in general Fulltext... Hierarchy... Expanded...G05)

|  | G21F 9/00 |
Treating radioactively contaminated material; Decontamination arrangements therefor [2,5]

|  | G21F 9/02 |
· | Treating gases [2]

|  | G21F 9/04 |
· | Treating liquids [2]

|  | G21F 9/06 |
· · | Processing (separating different isotopes of the same chemical element Fulltext... Hierarchy... Expanded...B01D 59/00)

|  | G21F 9/08 |
· · · | by evaporation; by distillation

|  | G21F 9/10 |
· · · | by flocculation

|  | G21F 9/12 |
· · · | by absorption; by adsorption; by ion-exchange

|  | G21F 9/14 |
· · · | by incineration; by calcination, e.g. desiccation

|  | G21F 9/16 |
· · · | by fixation in stable solid media

|  | G21F 9/18 |
· · · | by biological processes

|  | G21F 9/20 |
· · | Disposal of liquid waste

|  | G21F 9/22 |
· · · | by storage in a tank or other container

|  | G21F 9/24 |
· · · | by storage in the ground; by storage under water, e.g. in ocean

|  | G21F 9/26 |
· · · | by dilution in water, e.g. in ocean, in stream

|  | G21F 9/28 |
· | Treating solids [2]

|  | G21F 9/30 |
· · | Processing (separating different isotopes of the same chemical element Fulltext... Hierarchy... Expanded...B01D 59/00)

|  | G21F 9/32 |
· · · | by incineration

|  | G21F 9/34 |
· · | Disposal of solid waste

|  | G21F 9/36 |
· · · | by packaging; by baling