RADIATION MONITOR FOR HIGH-TEMPERATURE WATER

摘要

PROBLEM TO BE SOLVED: To prevent the breakage of NaI crystal by the application of a stress to the part fixed to a detector thereof in the occurrence of a sudden temperature change in the detector in a radiation monitor for high-temperature water for measuring radiation in a high-temperature solution which uses the NaI crystal in the detection part of the detector. SOLUTION: This radiation monitor for high-temperature water comprises the detector and a well containing the detector and in contact with the high- temperature solution. A means for thermally insulating the detector from a system to be measured and moderating the time change of the temperature to prevent a sudden temperature change is added to the detector.