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With the increase in world nuclear power operating experience, manufacturing and development of IT technology, equipment reliability, and enhance the degree of automation systems, resulting in the safe and stable operation of nuclear power plant level has been greatly improved. Nuclear power companies began to consider upgrading the economic efficiency, in order to increase the competitiveness of enterprises to participate in the energy market competition, and shorten the duration overhaul is effective way. Nuclear power companies in Europe and America from the twentieth century began to study ways to shorten the duration of the overhaul, and to take the appropriate measures, the results achieved good results. Such as: The United States has achieved a short overhaul period 17.02 days, the French short overhaul 23.04 days. Daya Bay Nuclear Power Station after overhaul constantly sum up and feedback, continuous improvement, has made overhauling the shortest duration of 25.97 days, compared with European and American nuclear power plants there is a certain gap. With the deepening of economic globalization, China's industries must face the challenges of the world economy, the nuclear power industry also do so. Was signed in this case, the Daya Bay nuclear power plant developed in ensuring the safety and quality of the premise, to shorten the duration of the overhaul goals. How to shorten the overhaul period, is a very complex system engineering, at present, the domestic nuclear power plants no systematic analysis and research. In this paper, collecting and reading relevant literature, based on the use of theoretical research, case studies, contrast, reasoning and other research methods, through a combination of theory and practice of argumentation method, the system analyzes the main factors affecting the duration of the overhaul, identify good practices and deficiencies, suggested a solution strategies and recommendations, in order to shorten the duration overhaul of nuclear power plants provide a useful reference. Author based nuclear overhaul project tasks and objectives, the use of project management and operational management of the theoretical knowledge of nuclear power, affecting the duration of the overhaul of several aspects of the theory. Such as: project organization and management overhaul efficient allocation of resources and manpower, overhaul maintenance projects and long-term planning, overhaul plan preparation (including network planning and contingency plans), nuclear safety management, quality management. In this thesis, the choice of organizational structure from the project, 6BS structural decomposition principle to the responsibility matrix formation, and human resource planning three aspects are described repair project organization and management and human resources effective allocation theory. From scheduling technical principles, the principles of project work breakdown structure to the formation of network planning, as well as the preparation of emergency plans and other three aspects of long-term overhaul maintenance projects planning and programming principles. From nuclear safety in the overhaul of the status of nuclear safety management and use of analytical methods and management systems such as two aspects of safety management theory expounded. From the basic principles of quality management, quality management system to establish principles, procedures, and operational and other aspects of quality management theory expounded. Daya Bay Nuclear Power Station imported from France, nuclear power plant design principles, file system, operations management and the French are very similar, but the Daya Bay nuclear power plant overhaul overhaul period and duration compared to the French, on the whole there is a certain gap, through benchmarking comparison and found that the Daya Bay nuclear power plant overhaul have a good side and inadequacies. Excellent place mainly in the reactor shutdown and start the process heap, but in the quarantine system, equipment maintenance, lift the quarantine, such as overhauling the system recovery can be center stage, there is a relatively large gap. Through the use of theoretical knowledge, combined with Daya Bay Nuclear Power overhaul the actual operation of the project, a comprehensive analysis of the main factors affecting the duration overhaul, overhaul Daya Bay pointed out the advantages and disadvantages of the Department, and the use of the Daya Bay Contingency Plan Management program, the U.S. nuclear power plants Nuclear Security Administration and other cases to give evidence. Daya Bay Nuclear Power Station after several overhauls practical exercise, as well as continuous review and feedback, in the overhaul process both directly and indirectly related to the theoretical knowledge into practice, summed up the Daya Bay Nuclear Power overhaul implementation results and shortcomings, and proposed to further improve the recommendations and strategies. In this article I focus on the environmental aspects of the project, overhaul maintenance projects, nuclear safety management, quality management, equipment modification and other effects on the overhaul period, systematic presentation of the factors affecting the overhaul period, hoping to shorten the overhaul period for China's nuclear power plants to provide useful reference. Meanwhile, the nuclear power plant overhaul as the system works to shorten the overhaul period is a complex and difficult task, there are many problems to be solved, which requires theoretical researchers and business practitioners common concern of all personnel, including an early realization of China's nuclear power plant overhaul schedule to meet or exceed the international advanced level.
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