SECURITY MODEL OF NATURAL GAS SUPPLY TO EU MEMBER STATES

The article is dedicated to development of theoretical aspects of energy security of the EU member states with reference to natural gas supply security following basic approaches to a shortterm energy security which are defined by the MOSES model, proposed by the International Energy Agency. It is performed through adding and modifying of specific indicators, used in the MOSES model, and their adapting to the EU gas market, taking into account its peculiarities and using the valid EU gas infrastructure standard "N – 1" for calculation of the minimum required number of external supply sources of natural gas, required to secure the minimum level of diversification of external supply sources of natural gas. Its availability is the main condition of assurance of the minimum level of natural gas supply security. The author proposes an integrated dimensionless composite index of natural gas supply security which is formed through aggregation of several defined indicators of energy security depending on their weight coefficients, and which is a quantitative measure of the level of energy security regarding natural gas supply.