Monitoring and alarming device for departure from nucleate boiling ratio (DNBR) of reactor core of pressurized water reactor

Abstract

The invention discloses a monitoring and alarming device for a departure from nucleate boiling ratio (DNBR) of a reactor core of a pressurized water reactor. Relevant factors which are detected by a detector is conducted through data preprocessing and a DNBR data base is obtained, and meanwhile, a DNBR nonlinear computational model which is trained by a cloud adaptive support vector machine is adopted to calculate a DNBR value, an output module displays the DNBR value, a differentiating signal is transmitted to a DNBR alarming controller to trigger alarming through a signal transmission device in a manual or intelligent mode, a DNBR alarming signal is fed back to the data base, a disaster signal which needs to be alarmed is transmitted to an alarming system, and relevant people conduct urgent elimination measurements on DNBR occurrence conditions inside the reactor core of the pressurized water reactor. The monitoring and alarming device for the DNBR has self-learning ability, continuously improves a DNBR computational model, and utilizing a central processing unit system to conduct real-time processing. The monitoring and alarming device for the DNBR is rapid in reaction speed, high in fault tolerance, capable of monitoring and forecasting changes of the DNBR inside the reactor core of the pressurized water reactor accurately and rapidly.

Description

technical field [0001] The invention relates to the field of nuclear engineering, more particularly, to a DNBR monitoring and alarm device for a pressurized water reactor core. Intelligent pressurized water reactor core DNBR monitoring and alarm device with self-learning function. Background technique [0002] In order to solve the increasing energy demand of mankind, nuclear energy is used more and more. At present, the reactors used in nuclear power plants, nuclear submarines and nuclear powered aircraft carriers all over the world are mainly pressurized water reactors. However, while nuclear energy is used peacefully, security issues cannot be ignored. In thermal design, in order to ensure the safety of the reactor heat exchange system, one of the limiting parameters that cannot be exceeded at any point in the core is the critical heat flux density. For pressurized water reactors, the main boiling crisis mechanism is Departure from Nucleate Boiling (DNB). In order to ...

AI Technical Summary

Problems solved by technology

Because the sub-channel analysis program is large, the calculation is complex, and it takes too much time, it is not conducive to the online monitoring and forecasting of the deviation from the saturated boiling ratio DNBR, which makes the development of DNBR online monitoring devices a bottleneck.

Although the calculation speed of the subsequent analysis method combining single channel and sub-channel has been slightly improved, the monitoring method lacking the support of the physical mechanism model still cannot break through its limitations.

Images