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Control rod guide thimble temperature measurement body, fuel assembly temperature measurement device, and temperature measurement method
Control rod guide thimble temperature measurement body, fuel assembly temperature measurement device, and temperature measurement method
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机译：控制杆导向套管测温体，燃料组件测温装置及测温方法
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摘要
PROBLEM TO BE SOLVED: To provide a temperature measurement body of a control rod guide thimble, etc. capable of simultaneously and easily measuring temperature at a plurality of parts of each of an axis direction of the control guide thimble, and a direction perpendicular to the axis direction, easily and exactly measuring temperature distribution of a fuel assembly.SOLUTION: A temperature measurement body of a control rod guide thimble includes: a protective pipe with outer diameter dimensions smaller than inner diameters of the control rod guide thimble; an axis rod which is slidably stored in the protective pipe; a plurality of thermocouples attached to the outer peripheral surface of the protective pipe at proper intervals in a pipe axis direction; and a pressure body which projects from the outer peripheral surface on the side opposite to a position to which the thermocouples of the protective pipe are attached by pulling up of the axis rod, in which the pressure body which projects from the outer peripheral surface of the protective pipe presses the inner peripheral surface of the control rod guide thimble to bring the thermocouples into contact with the inner peripheral surface of the control rod guide thimble. A temperature measurement device of a fuel assembly includes a temperature measurement body. In a temperature measurement method of the fuel assembly, temperature of the fuel assembly is measured by using the temperature measurement device of the fuel assembly.
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