G - PHYSICS
G21 - NUCLEAR PHYSICS
G21C - NUCLEAR REACTORS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
G - PHYSICS
G21 - NUCLEAR PHYSICS
G21C - NUCLEAR REACTORS
G21C1/18 - coolant being pressurised
G21C1/20 - moderator being liquid, e.g. pressure-tube reactor
G21C15/04 - from fissile or breeder material {
G21C15/06 - in fuel elements
G21C3/04 - Constructional details
G21C3/041 - {Means for removal of gases from fuel elements}
G21C3/16 - Details of the construction within the casing
G21C3/32 - Bundles of parallel pin-, rod-, or tube-shaped fuel elements
G21C7/10 - Construction of control elements
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E30/30 - Nuclear fission reactors