SummaryThis is a thesis about technology and to a lesser extent, science. To be moreprecise, it is about how a technological society (Norway) tries to protect itselffrom risk born from the same technology that is sustaining it. The thesis ismore specifically about how a governmental appointed commission made arisk assessment on behalf of the Norwegian society in the year 2000. Thecommission was commonly referred to as the “Vulnerability Commission”,since one of it’s main findings was that modern society is becomingincreasingly more vulnerable. This thesis analyses the commissions use of the“technical” risk concept, where risk is defined as a function of the probabilityof possible unwanted events and the consequences of these.The central theme in this thesis is that “how” risk is defined, is somethingthat greatly influences how a risk assessment is, and can be done. By choosingto define risk in this manner, the commission have a priori reduced orexcluded some aspects of risk from the assessment. The main part of thisthesis is therefore about how the choice of a specific risk definition to someextent “directed” the answers the commission gave in response to it’smandate.