In-core temperature control and monitoring is a critical process in a nuclear reactor.Thermocouple based on temperature measurement is one of the techniques suitable for temperature measurement in the nuclear reactor with relatively high accuracy.However,due to the existence of In-core temperature control and monitoring is a critical process in a nuclear reactor. ThermoCouple based on temperature measurement is one of the techniques suitable for temperature measurement in the nuclear reactor with relatively high accuracy. However, due to the existence of