MULTIPLE THERMOCOUPLE FURNACE INNER CORE MEASURING INSTRUMENT, AND NUCLEAR REACTOR INTERNAL STATE MONITORING SYSTEM AND MONITORING METHOD AFTER SERIOUS ACCIDENT USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multiple thermocouple furnace inner core measuring instrument, and a nuclear reactor internal state monitoring system and a monitoring method after a serious accident using the same.SOLUTION: In a multiple thermocouple furnace inner core measuring instrument, a signal compensation detector 140, thermocouples 121, 122, 123, 124, 125, and a plurality of neutron detectors 170 are installed in a space between a center tube 110 having a circular cross section and an external protective tube 150, with the plurality of thermocouples having temperature measuring points formed at different heights.SELECTED DRAWING: Figure 5