- NUC 000: Belonging to the Subject; not further Classified
- NUC 001: Nuclear Technology, Nuclear Energy in General
- NUC 005: Staff in Nuclear Plants (Training, Advanced Training, Selection of Personnel, ...)
- NUC 010: Debates on Risks Concerning Nuclear Energy and Nuclear Technology
- NUC 025: Authorities and Organizations
- NUC 030: Nuclear Technology in Individual States and Alliances of States
- NUC 040: Mining of Ores Relevant for Nuclear Technology (Uranium Ores, ...); Exploitation of Deposits
- NUC 050: Nuclear Methods, Auxiliaries (Nuclear Process Engineering)Nuclear Fuels, Nuclear Fuel Elements see NUC 520 ff
- NUC 005: Staff in Nuclear Plants (Training, Advanced Training, Selection of Personnel, ...)
- NUC 200: Nuclear Fission Technology; Reactor Construction
- NUC 205: Mathematical Methods and Auxiliaries; Simulation
- NUC 210: Reactor Physics; Reactor Theory
- NUC 250: Reactor Metrology; Reactor Experiments
- NUC 270: Reactor Thermodynamics; Cooling Agents and Cooling Systems
- NUC 272: Thermodynamics and Heat Transfer in Reactors; Heat Exchangers (Primary Circuit)
- NUC 275: Cooling Systems in GeneralCooling Towers see MTA 850
- NUC 277: Cooling Agents
- NUC 279: Other
- NUC 272: Thermodynamics and Heat Transfer in Reactors; Heat Exchangers (Primary Circuit)
- NUC 290: Reactor Calculation and Dimensioning
- NUC 205: Mathematical Methods and Auxiliaries; Simulation
- NUC 300: Types of Nuclear Reactors
- NUC 400: Nuclear Reactors According to Designated Use
- NUC 410: Research Reactors
- NUC 420: Test Reactors
- NUC 430: Training Reactors; Low Power Reactors
- NUC 440: Breeding Reactors; Converters
- NUC 460: Nuclear Propulsion Reactors
- NUC 470: Power ReactorsNuclear Power Plants see ERG 660
- NUC 499: Other
- NUC 410: Research Reactors
- NUC 500: Nuclear Reactor Construction Materials and Components
- NUC 600: Nuclear Reactor Operation, Control and Safety
- NUC 605: Economic Method of Operation; Down Time; Outage Time; Operational Organization
- NUC 610: Nuclear Reactor Operation in General
- NUC 640: Nuclear Reactor Safety
- NUC 650: Protection against RadiationRadiation Exposure; Radiation Injury / Contamination see also MED 545
- NUC 605: Economic Method of Operation; Down Time; Outage Time; Operational Organization
- NUC 700: Nuclear Fusion; Nuclear Fusion Reactors
- NUC 800: Radioactive Waste and its Treatment; Nuclear Waste
- NUC 801: Location Strategies Concerning Nuclear Waste Disposal
- NUC 805: Safety Issues Related to Disposal
- NUC 810: Disposal in General (Packaging, Transportation, Interim Storage, Ultimate Disposal, ...)Reprocessing see NUC 870
- NUC 870: Reprocessing of Spent Nuclear Fuel Elements
- NUC 890: Decommissioning and Demolition of Nuclear Plants
- NUC 899: Other
- NUC 801: Location Strategies Concerning Nuclear Waste Disposal
- NUC 900: Use of Nuclear Technology
- NUC 910: Use of NuclidesRadionuclides used as Sources of Energy (Isotope Batteries) see ERG 950
- NUC 960: Use of High-Energy Radiation Emitted by Reactors, Accelerators etc.
- NUC 990: Peaceful Use of Nuclear Weapon Explosions
- NUC 999: Others on Use of Nuclear Technology
- NUC 910: Use of Nuclides