Dynamic Security Assessment System And Method For Nuclear Steam Generator

As the key component of nuclear power plant, the structural integrity of steam generator is closely linked with the realibility of the nuclear power plant. Many domestic and foreign research institutions are studying the dynamic security assessment for steam generator in nuclear power plant. Currently, compared with the countries with developed nuclear technology, China has great distance in Management System, assessment technology and database construction. In order to speed up the database construction of steam generator dynamic security assessment, and to improve the service level of database system, the knowledge grid, ontology and multi-scale are introduced into the traditional dynamic security assessment system. An on-line steam generator dynamic security assessment system for supporting knowledge sharing, remote cooperative and dynamic interaction is constructed by using the advanced information technologies.In order to realize knowledge sharing, remote cooperative and dynamic interaction in component dynamic security assessment, the system framework of dynamic security assessment supported by multi-knoledge, multi-information and multi-resources and based on knowledge grid is constructed. The resource nodes are open and assorting with each other, sharing the resource information, managing and dispatching are unified with grid technology service platform, the serving information is offered for different users, manufactures and research units.According to the actual demand and promblems in the steam generator dynamic security assessment, a steam generator dynamic security assessment method based on multi-scale is proposed, which makes the assessment focus on the key parts that has an important influence on the safety and reliable operation, and improves the economy, moderate degree and proportionality of the assessment.Aiming at the problems of knowledge expressing and information organizing in dynamic security assessment domain, the ontology is introduced into conception modeling for this domain. S-F-P-A dynamic security assessment knowledge expressing model of steam generator is created, and the ontology classification system and the knowledge representation method are introduced. Then the description of knowledge is standardized to some extent, which makes the knowledge reused, shared, commuted possible and brings a effective settlement method for realizing knowledge sharing and remote cooperative in steam generator dynamic security assessment.Based on the researches above, the system of steam generator dynamic security assessment is designed and developed, then the function model of steam generator dynamic security assessment system that for the practical application is constructed. The feasibility and practicability of the system are verified by practical application in a nuclear power plant.Finally, it summarized all the work and results achieved in this paper. The further research work to be developed is also put forward.