Risk reduction approach to decommissioning hazards of nuclear facilities

Decommissioning activities include radiological hazards and non-radiological hazards. Radiological hazards are mainly due to radiation exposure whereas non-radiological hazards are mainly due to industrial hazards such as fire, explosions, toxic materials, and electrical and physical hazards. Based on characteristics of decommissioning activities, risk calculation method of decommissioning hazards and countermeasures of radiological hazards and non-radiological hazards were suggested.