F - MECHANICAL ENGINEERING
F22 - STEAM GENERATION
F22B - METHODS OF STEAM GENERATION
F - MECHANICAL ENGINEERING
F28 - HEAT EXCHANGE IN GENERAL
F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
F - MECHANICAL ENGINEERING
F22 - STEAM GENERATION
F22B - METHODS OF STEAM GENERATION
F22B1/123 - {Steam generators downstream of a nuclear boiling water reactor}
F22B37/10 - Water tubes
F - MECHANICAL ENGINEERING
F28 - HEAT EXCHANGE IN GENERAL
F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
F28D2021/0054 - {for nuclear applications
F28D2021/0064 - {Vaporizers, e.g. evaporators}
F28D7/02 - the conduits being helically coiled
F - MECHANICAL ENGINEERING
F28 - HEAT EXCHANGE IN GENERAL
F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
F28F1/122 - {and being formed of wires}
F28F13/00 - Arrangements for modifying heat-transfer, e.g. increasing, decreasing
F28F13/08 - by varying the cross-section of the flow channels
G - PHYSICS
G21 - NUCLEAR PHYSICS
G21C - NUCLEAR REACTORS
G21C1/08 - moderator being highly pressurised, e.g. boiling water reactor, integral super-heat reactor, pressurised water reactor
G21C15/02 - Arrangements or disposition of passages in which heat is transferred to the coolant
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
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S376/903 - Shapes