The article has analyzed approaches to risk assessment in the integrated safety system, where the features of engineering, organizational & engineering, and organizational risks are described. Special attention is paid to the organizational & engineering and organizational risks that are supposed to mean insufficient actions (deficiencies) of personnel in all sectors of safety, as well as initiating events whose manifestations can cause accidents and fires. Based on the accident statistics at the oil and gas industry enterprises in Russia, the analysis of scenarios has been conducted, including the identification of the sequence and development of accidents and fires, and the results, with their total volumetric ratio of 87 % and 13 % respectively, have been obtained.
The hierarchical classification of risk assessment methods when processing the information in the primary (the 1st class) and derived (the 2nd class) scales has been built. For the transformation of organizational risks into a quantitative form with their qualitative description, the expert assessment methods have insufficient completeness of relations when jointly used, are more sensitive, which leads to significant errors in the assessment results. The substantiation of the reasonability of using the hierarchy analysis method, classified as one of the methods of pairwise comparison matrix analysis, using which the qualitatively described causes of organizational risks can obtain quantitative values in the form of weighting factors, has been provided. A template matrix that significantly facilitates the procedure of organizational risk assessment at explosion and fire-hazardous enterprises has been developed. The substantiation of new risk assessment results after their reliability and sensitivity verification has been provided. Solving problems that aim to increase the efficiency of the integrated safety system addresses the issue of underestimation of the damage to life and health of personnel and third persons, as well as the economic damage to explosion- and fire-hazardous enterprises, which is a matter of social and economic importance for Russia.
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