Improved On-Line Core Monitoring Based on Thermal-Hydraulic Simulation Model

摘要

For nuclear power plants (NPP), operating parameters of reactor core such as the maximum fuel center temperature, the maximum cladding surface temperature, minimum departure from nucleate boiling ratio (MDNBR) cannot be monitored on-line as the lack of in-core sensors and detectors, which is an impediment for reactor operators to detailedly know the condition in core . The on-line monitoring technology based on the on-line thermal-hydraulic simulation could solve this problem satisfactorily, therefore, it will assist operators more effectively and, to some extent, improve safety and economy of reactor core.In this paper, THEATRe, REMARK, and COBRAIIIC are coupled on SimExec simulation platform to accomplish the feedback calculation of reactor thermal hydraulic and reactor physics . And the safety parameters are determined according to the basic principles of reactor core safety. A graphical man-machine interface is designed by Visual Studio C# aimed to display the results of on-line core monitoring system.