One important scope of the Siting and Environmental Department that belongs to Egyptian Regulatory Body (ENRRA) is conducting search in the area of site selection and evaluation of nuclear installations. International Atomic Energy Agency developed an Approach for its member's states 1994 using in site selection and evaluation of radioactive waste disposal repositories. This approach consists of planning, survey, and characterization and confirmation stages. But, the implementation of such an approach is associated with difficulties when it is applied manually. In the last decades, Geographic Information System (GIS) is commonly used in most fields of sciences. In this work, a Modified Method (MM) and GIS system have been used to locate the most suitable sites, for radioactive wastes borehole disposal facility. To facilitate the implementation of IAEA' approach some modifications have been introduced. Here, in this MM the site survey stage is divided into three phases, each of them has its own criteria and GIS multi-criteria feature has been applied. This MM has been tested in locating optimum sites for borehole disposal facilities with certain criteria The MM is characterized by its easy use and save time.