Identifying and Assessing Threats in vital Urban Infrastructure with Passive Defense Approach (Case Study: T)

The vital infrastructure is now considered as one of the valuable assets of any society, so that the smallest impairment in performance or damage to their bodies results in substantial material and spiritual damage. Knowing and ranking the threats facing each area is the first step in conducting passive defense studies. What is being addressed in this research is the ranking of threats that threaten the critical infrastructure of the 6th region of Tehran. The existence of critical infrastructure such as: Jalali refinery, Atomic Energy Organization of the country, the subway stations of the region including: Revolution and Valie-Asr, ministries of oil, the country and industries and mines show the high importance of this region from the urban and national point of view. The present research is considered as an applied research in terms of research type and in terms of the nature of research, it is considered descriptive-analytic research. Based on this, in the stage of identifying human threats, a deliberate construction of the critical infrastructure of the library method has been used for interviewing (qualitative). Also, in order to assess the threats, the questionnaire (quantitative) method was used by the technique provided by the Federal Agency for Crisis Management in the United States and the hierarchical analysis model. The research findings showed that the threat of air and missile attacks was the main threat to the vital infrastructure of the region. Also, potential threats to key assets of the sample were identified.