Work "Providing emergency power nuclear power plant" describes how solving their own consumption nuclear power plant, as emergency power supply is designed and how it should be a solution of known states of emergency, having an immediate impact on the power consumption of their own nuclear power plants. The aim of this thesis is to propose options to strengthen its own emergency power consumption of nuclear power plants, one might say-more resistant to harsh extremes, which could lead to loss of employment, reserve and emergency power, that is the condition called Station Black Out (SBO) - total loss of power. The work also includes calculations of short-circuit ratios emergency resources considered as strengthening, as well as the calculation of acceleration heaviest drive and a summary of the overall impacts of the proposed hardening.