Fire safety

According to experience and probabilistic risk assessments, fires present a significant hazard in a nuclear power plant. Fires may be initial events for accidents or affect safety systems planned to prevent accidents and to mitigate their consequences. The project consists of theoretical work, experiments and simulations aiming to increase the fire safety at nuclear power plants. The project has four target areas: · to produce validated models for numerical simulation programmes, · to produce new information on the behavior of equipment in case of fire, · to study applicability of new active fire protecting systems in nuclear power plants, and · to obtain quantitative knowledge of ignitions induced by important electric devices in nuclear power plants. The topics explained below in detail have been solved mainly experimentally, but modelling at different level is used to interpret experimental data, and to allow easy generalisation and engineering use of the obtained data.