Abstract
Power plants inventory database has developed to support a deterministic quantitative model to compare the technical-economical and environmental features of various electric power plants. A customized computer code is developed to evaluate the overall function of alternative energy systems. The ESS-LCA method is used to analyze the environmental load of each power generation system in the lifecycle. The final result will be a rank of alternative sources of energy based on the composite distance of each alternative to the designated ideal source of energy.