FREIA is a simple tool for evaluating industrial fire safety. It considers fires and the accidental release of hazardous substances both inside and outside buildings. It gives a rough estimate on whether certain components within a room will be damaged or not. The system has been used for evaluating fire safety in both the process industry and at power plants for several years, and an example of an evaluation is presented in this paper. The system has been found to be valuable in finding weak links in the fire safety system.