Obtaining accurate source term data released by nuclear facilities is the basis for radiation environmental impact assessment.This paper sorts out and analyzes the research progress and research results of the United States,France and China in the field of nuclear facility release source term acquisition technology.The research in the United States and France started earlier,and a large number of experimental measurements and numerical simulations have been carried out for a variety of working conditions and release scenarios,and a more systematic source term manual has been established.In our country,the study of nuclear facility release source terms is carried out by using experimental and simulation means,and the key parameter acquisition technology and source term estimation method are preliminarily established.It is suggested that the typical working conditions and release scenarios of nuclear facilities should be studied in line with domestic process flow and actual conditions,so as to provide accurate source term data for radiation environmental impact assessment of nuclear facilities.