Neutron radiation is used for many purposes, such as power generation in nuclear reactors, cancer therapy in particle accelerators, industrial applications like radiography or activation analysis in connection with the use of radionuclide neutron sources. Neutron radiation is also widely employed in fundamental research. As handling neutron radiation is always associated with the risk of personnel exposure, special radiation protection measures must be taken to protect persons occupationally exposed to radiation, and methods of measuring neutron equivalent doses on the spot and on persons must be kept ready for use. The legal obligations to do so arise from the Radiation Protection Ordinance.