This paper studies the concepts and key elements of environmental risk assessment, focusing on development of accident risk assessment of nuclear power plants and radiation protection for non-human species, and proposing a framework for environmental risk assessment of nuclear power plants. In this framework, we try to adopt the analytic hierarchy process to calculate the endpoints'weights to the environmental risk of nuclear power plants and discuss its risk characterization with supposed source term, which would be a useful tool to support the environmental risk administration of nuclear power plant.

environmental risk assessment  /  health risk  /  ecological risk