A new research project has started to develop two kinds of Internet communication systems which are aimed at effective social risk information on nuclear energy. One is mutual communication system for fostering safety culture among the workers in nuclear industry¡¡while the other is to enlighten general public about the risk issues on final disposal of high-level radioactive waste. Prior to the Internet systems development, social investigations have been conducted on risk perception for nuclear power for both the nuclear experts and women in the metropolitan area, in order to know how and what should be considered for the effective risk communication methods. It was found from the statistical analysis to the results of social investigation that the majority of nuclear people take business risk seriously but there is a fraction of nuclear people who are afraid of present practice of nuclear power operation while women in metropolitan area are evenly afraid of radioactive risk. The obtained results of social investigation gave useful insight for developing two kinds of risk communication systems and the related field study for enhancing safety culture in nuclear industries.