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CPC Subgroup
G21C 7/10

Construction of control elements

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

5 direct subcodes

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
  • G21C 7/107 Control elements adapted for pebble-bed reactors
  • G21C 7/11 Deformable control elements, e.g. flexible, telescopic, articulated
  • G21C 7/113 Control elements made of flat elements; Control elements having cruciform cross-section
  • G21C 7/117 Clusters of control rods; Spider construction

Top Applicants

Top 10 applicants by patent filingsfor class G21, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINA GENERAL NUCLEAR POWER CORPORATION 1,383
  2. WESTINGHOUSE ELECTRIC CORPORATION US 1,347
  3. KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,303
  4. CGN POWER COMPANY 1,156
  5. CHINA NUCLEAR POWER ENGINEERING COMPANY 1,149
  6. KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,146
  7. NUCLEAR POWER INSTITUTE OF CHINA 1,086
  8. CHINESE ACADEMY OF SCIENCES 765
  9. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 763
  10. CHINA INSTITUTE OF ATOMIC ENERGY 659