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PCE
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DIFF Subgroup
G21C 7/10

Construction of control elements

Introduced: September 1968

Full Title

Control of nuclear reaction > by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section > by displacement of solid control elements, e.g. control rods > Construction of control elements

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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  • G21C 7/103 Control assemblies containing one or more absorbants as well as other elements, e.g. fuel or moderator elements since 1990 IPC+CPC Available in IPC and CPC
  • G21C 7/107 Control elements adapted for pebble-bed reactors since 1990 IPC+CPC Available in IPC and CPC
  • G21C 7/11 Deformable control elements, e.g. flexible, telescopic, articulated since 1990 IPC+CPC Available in IPC and CPC
  • G21C 7/113 Control elements made of flat elements; Control elements having cruciform cross-section since 1990 IPC+CPC Available in IPC and CPC
  • G21C 7/117 Clusters of control rods; Spider construction since 1990 IPC+CPC Available in IPC and CPC