[en] Nuclear techniques used in the coal industry to determine specific energy, ash and moisture are outlined. Ash analysis by radioisotope X-ray techniques include a single X-ray measurement using a transmission or backscatter geometry and techniques with compensation for iron variations. Neutron techniques can be used to measure the concentration of some specific elements in coal. The measurement of specific energy, ash and moisture then depends on the correlation of the particular parameter with the measured elemental composition. Carbon can be determined by a combination of a measurement of 4.43 MeV ¹²C gamma-rays from neutron inelastic scattering with a separate ⁶⁰Co gamma-ray scattering measurement. Sulphur meters are based on the measurement of 5.42 MeV neutron capture of gamma rays