Kartläggning och kvalitativ analys av möjligheter och risker med reducerad syrehalt i brandceller innehållande elektrisk utrustning

Fires can be an important hazard for the overall safe operation of nuclear power plants. Prevention of fire, fast detection and efficient extinguishment of a fire are some parameters, which are important to consider when designing the fire safety in a nuclear power plant. As an alternative to extinguishment system the use of hypoxic air or hypoxic air venting has been introduced e.g. in storage room of a museum or a historical building. This system is now being proposed for use in fire compartments in nuclear power plants containing electrical equipment such as electrical cabinets, cable trays, etc. This reports is a pre-study to investigate the risk and advantages of this system for use in these types of rooms. This report also stipulates a number of areas where more research or investigations are necessary. The results in this report are based on a literature review of scientific publications and specific technical standards available in the area in combination with the technical expertise of the authors. The report should not be seen as a final evaluation of hypoxic air venting systems.