Room air with reduced oxygen levels that prevent materials to ignite and combust is a cost-effective and increasingly popular fire prevention method. For system safety reasons, the effects of hypoxia, that is, the lack of sufficient oxygen (that is, less than 21% oxygen which is the approximate oxygen level of normal air), on cognitive performance of persons working under such conditions are important to investigate. This report presents a study commissioned by Swedish Radiation Safety Authority with GEISTT AB as provider of the research. The rationale was to investigate system safety concerns of staff working in confined spaces with 15% oxygen as a fire prevention method at the Swedish nuclear power plant of Forsmark Kraftgrupp AB.
