Patent ID: 6697446
Filing Date: 2004-02-24
Classification: G21C,Y02E

Abstract:
An instrumented capsule for material irradiation tests in research reactors, comprising:a capsule main body installed in a vertical irradiation hole of a research reactor pool, said capsule main body consisting of: a shell opened at upper and lower ends thereof; a plurality of heat media set in said shell; a plurality of specimens set at a center and peripheral areas of each of the heat media; upper and lower reflectors installed on an upper end of an uppermost heat medium and under a lower end of a lowermost heat medium, respectively; a plurality of insulators interposed between adjacent heat media and positioned above and under the upper and lower reflectors, respectively; a spacer set in said shell at a position above an uppermost insulator; a spring seat installed above the spacer; a specimen compressing spring to bias the spring seat, thus compressing the specimens; temperature control means for controlling a temperature inside the shell, said temperature control means consisting of a vacuum control pipe and a heater; detecting means consisting of both a thermocouple used for detecting a temperature of the specimens and a dosimeter used for detecting a quantity of neutron radiation; upper and lower end plugs mounted to the upper and lower ends of the shell so as to seal the ends of said shell; and a lower fixing unit assembled with the lower end plug; and connecting means for connecting said capsule main body to a capsule control system installed outside the reactor pool.