A real-time monitoring method of critical heat flow in reactor components based on acoustic wave sensor

Abstract

The invention relates to a reactor internal component critical heat flux real-time monitoring method based on a sonic sensor, which is used for real-time monitoring on the event of critical heat flux (CHF) caused when abnormal working condition occurs on the first wall of the fusion reactor, facing to a plasma component, and a fission reactor core fuel assembly; according to the invention, since sound wave technology is adopted to monitor the event of CHF caused by a high heat component, the method has the remarkable advantages of good real-time property, large monitoring range, high precision and the like, overcomes the limitations that detection points are large in number, data acquisition is lagged and only limited parts can be detected when a thermocouple is adopted for monitoring the CHF event, avoids the defects of low surface emissivity, great change, uncertain temperature distribution caused by high parasitic reflection, and the like when infrared testing mode is adopted for monitoring the CHF event, and solves the difficulty in realizing real-time monitoring on the reactor internal component critical heat flux.

Description

technical field [0001] The invention relates to a method for real-time monitoring of critical heat flow of reactor internal components based on an acoustic wave sensor, and belongs to the field of thermal hydraulics of advanced nuclear reactors. Background technique [0002] The thermonuclear reactions of advanced reactors such as fusion reactors and fission reactors produce extremely high nuclear thermal power density. The internal components of the reactor, such as the first wall of the fusion reactor facing the plasma cladding and the divertor, and the fission reactor core fuel assembly need to specify the quality The flow rate of coolant flows away from the nuclear heat, cooling the internal components of the reactor. When unexpected working conditions occur in the operation of the reactor, such as fusion reactor plasma rupture, fission reactor overpower, etc., under the action of extremely high power density heat flow exceeding the operating permit, the cladding, the fi...

AI Technical Summary

Problems solved by technology

When thermocouples are used to monitor CHF events, the acquisition of temperature data lags behind due to the thermal time constant of the components in the reactor, and there are many components with a large number of measuring points, which can only measure local limited parts and other defects

When infrared thermal imaging cameras are used to monitor CHF events, due to the low surface emissivity of the detected components, the wide range of temperature changes, high thermal radiation, and parasitic reflections, the uncertainty of temperature distribution is large, resulting in a decrease in monitoring accuracy.

Images