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PCE
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DIFF Subgroup
G21C 3/34

Spacer grids

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements > Assemblies of a number of fuel elements in the form of a rigid unit > Bundles of parallel pin-, rod-, or tube-shaped fuel elements > Spacer grids

CPC:

Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements > Assemblies of a number of fuel elements in the form of a rigid unit > Bundles of parallel pin-, rod-, or tube-shaped fuel elements > Spacer grids

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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  • G21C 3/3408 CPC only CPC only
  • G21C 3/3416 CPC only CPC only
  • G21C 3/3424 CPC only CPC only
  • G21C 3/3432 CPC only CPC only
  • G21C 3/344 formed of assembled tubular elements since 1990 IPC+CPC Available in IPC and CPC
  • G21C 3/348 formed of assembled non-intersecting strips since 1990 IPC+CPC Available in IPC and CPC
  • G21C 3/352 formed of assembled intersecting strips since 1990 IPC+CPC Available in IPC and CPC