At the time of nuclear emergency, it is important to identify the type and the cause of the accident. Besides with these, it is also important to provide adequate information for the emergency response organization to support decision making by predicting and evaluating the development of the event and the influence of the release of radioactivity for the environment. Recently, a new type of nuclear disaster prevention support system called MEASURES (Multiple Radiological Emergency Assistance System for Urgent Response) was developed which provides not only the current state of the nuclear power plant and the influence of the radioactivity for the environment, but also the future prediction of the accident development. In order to provide the accurate results of these analyses quickly, MEASURES utilizes the various techniques, such as multiple nesting method, which narrows down the calculation area gradually, and parallel processing computer for three-dimensional analyses, such as air current distribution analysis. In this paper, the outline and the feature of MEASURES are presented, especially focused on the usage of parallel processing computer for the threedimensional air current distribution analysis with Regional Atmospheric Modeling System (RAMS) developed by Colorado State University.

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As the Chinese government has adopted and is implementing nuclear power as one of the strategies to satisfy growing demand and the need for power diversity and energy security, how the general public in China perceives the nuclear power option has drawn the attention of government agencies and the nuclear industry. Based on the latest surveys for 2005 and 2006, the public's perception of nuclear power was measured in five major areas. Firstly, concerning the benefit of nuclear power, an absolute majority (86%) agree with its contribution to power supply and diversity, and about one-half of the people surveyed agreed with the role of nuclear power as economical (48%), environmentally beneficial (59%), and of benefit to the local economy (60%). Secondly, concerning the risk of nuclear power, while a plurality (60%) believe that nuclear power plants currently operating in China are safe, fewer respondents (36%) think that the nuclear power plants in the world are safe (37%), and about one-half of the respondents think that a nuclear power plant has a negative impact on its surroundings (51%) and that it is difficult to dispose of nuclear waste (53%). Thirdly, when asked whom the public trusts relating to nuclear power, the expert is named first (73%), followed by central government (61%), utility (52%), and lastly local government (39%). Fourthly, nuclear knowledge and familiarity was addressed by the surveys. While about one-third of the people score well (32%), more than a quarter of the respondents (28%) have no basic idea about nuclear power. Lastly, concerning the public's attitude toward nuclear power, a clear majority (83%) support nuclear power development in China, while less than one-half (48%) support the local construction of a nuclear power plant. Further analysis of the survey results shows that there is no obvious attitude difference to nuclear power development between men and women, and the age factor attitude difference is not obvious either. In contrast, education is an important factor that affects the public's attitude toward nuclear power development, as people with higher education are more supportive of national development and less supportive of the construction of local nuclear power plants. It is concluded that, at present in China, an overwhelming majority supports the national development of nuclear power, meanwhile, vagueness in the public's understanding of nuclear power still widely exists.

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