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The work analyzes the fire hazard categories of oil field facilities. It is shown that the analysis of the results of an accident with the release of all contents from an oil tank and calculation of the average release, and therefore the damage, reveal an 8.8-fold deviation from that adopted by the regulatory document. A fireball, as in the development of an accident, at oil field development sites cannot be realized, because properties of the products are incapable for instant evaporation even under preheating conditions. [ABSTRACT FROM AUTHOR]

The article proposes a method for selecting options for the reconstruction of the power supply system based on the criteria of decision-making theory. The reconstruction process is considered as a sequential game with two players : active and passive. The probability of possible states of the system is determined on the basis of the fuzzy sets theory. The main criterion for the choice of the reconstruction option is the value of damage from the power supply interruption. The application of the proposed method is considered on the example of a large metallurgical enterprise.