Designing a Model for Layout of Pressure Reduction Stations by FAHP Approach in Sistan & Baluchestan Gas Company of Iran

According to Warden's five strategic rings, exertion centers of a country are those five rings and concentric circles that generally make the main structure of a country's power. In this strategy, production and the key products including electricity powerhouses, refineries and fuel tanks, water-supplying network and gas distribution network are in the second ring. By destruction and demolition of these aims, other organs and structures would become paralyzed and the economical, operational and supportive foundations would collapse. Therefore the foundations like gas distribution network have got a particular importance in the security protection in the event of a crisis. One of the facilities used in gas distribution networks is TBSs (Town Border Stations). Security of the TBSs is important, because there are plenty of them and from the settlement point of view, they locate in urban, habitual, commercial and industrial regions. The correct and methodical site selection of these stations and the other gas distribution facilities is one of the most important ventures that causes a considerable decrease in the subsequent expenses of activities and circumstances related to those centers. Increasing the passive defense capability increases the security coefficient and causes an intense decrease in enemy attacks and probability and destructive effects of the probable attacks. In this research, in addition to recognition of the effective factors in the site selection of these stations, emphasizing the passive defense factors, a synthetic model is presented for site selection of the TBSs. Statistical analysis methods are used in order to expand this model. The stations are considered in three aspects including public facilities, undesirable facilities and delicate facilities.