[en] Environmental Impact Assessment is a process of identifying, predicting and mitigating the negative impacts of development projects on physico-Chemical, biological, socio-economic and cultural environments. The main purpose of Environmental Impact Assessment process is to inform decision makers of the likely impacts of a proposal before a decision is made.Environmental Impact Assessment provides an opportunity to identify key issues and stakeholders early in the life of a proposal so that potentially adverse impacts can be addressed before final approval decisions are made. There are different methods for implementing an Environmental Impact Assessment project. The best method is one, which can quantify the impacts and assess the impacts rapidly. This paper attempts to investigate and compare capabilities of the Environmental Impact Assessment prevalent methods including questionnaire, matrix, system analysis, maps overlay, networks and ELECTRE-TRI multi-criteria decision method. This paper indicates that ELECTRE_TRI is an appropriate method for Environmental Impact Assessment projects. However, the final judgment of the selection of Environmental Impact Assessment method depends on the Environmental Impact Assessment experts opinions.

[en] Life Cycle Assessment is an environmental management tool for assessing the environmental impacts of a product of a process. life cycle assessment involves the evaluation of environmental impacts through all stages of life cycle of a product or process. In other words life cycle assessment has a ^cradle to grave^approach. Some results of life cycle assessment consist of pollution prevention, energy efficient system, material conservation, economic system and sustainable development. All power generation technologies affect the environment in one way or another. The main environmental impact does not always occur during operation of power plant. The life cycle assessment of nuclear power has entailed studying the entire fuel cycle from mine to deep repository, as well as the construction, operation and demolition of the power station. Nuclear power plays an important role in electricity production for several countries. even though the use of nuclear power remains controversial. But due to the shortage of fossil fuel energy resources many countries have started to try more alternation to their sources of energy production. A life cycle assessment could detect all environmental impacts of nuclear power from extracting resources, building facilities and transporting material through the final conversion to useful energy services