INTERNAL STRUCTURE MEASUREMENT DEVICE OF CYLINDRICAL STRUCTURE, INTERNAL STRUCTURE MEASUREMENT METHOD OF CYLINDRICAL STRUCTURE, AND INSPECTION DEVICE OF COOLING WATER PIPELINE IN NUCLEAR FUSION DEVICE

To provide an internal structure measurement device of a cylindrical structure and an internal structure measurement method of the cylindrical structure which can acquire information about an internal structure of the cylindrical structure in a non-immersion manner without increasing the complexity or size of the device.SOLUTION: An internal structure measurement device of a cylindrical structure includes: an ultrasonic probe which is introduced into a space in the cylindrical structure; a support body which supports the ultrasonic probe; and a drive mechanism which moves the support body in a radial direction of the cylindrical structure. The drive mechanism is provided outside the cylindrical structure. An internal structure measurement method of the cylindrical structure is also provided. According to this invention, the adhesion between the ultrasonic probe and an inspected site is improved when bringing the ultrasonic probe into contact with the inspected site of the cylindrical structure, and measurement based on the ultrasonic flaw detection in a non-immersion manner can be performed stably. In addition, by installing the drive mechanism outside the cylindrical structure, the structure introduced into the cylindrical structure can be miniaturized, and measurement can be performed for the cylindrical structure with a small diameter.SELECTED DRAWING: Figure 5 【課題】本発明の課題の一つは、装置を複雑化、大型化することなく、非浸水式で筒状構造物の内部構造に係る情報取得を可能とする筒状構造物の内部構造測定装置及び筒状構造物の内部構造測定方法の提供である。【解決手段】上記課題を解決するために、筒状構造物内の空間に導入される超音波探触子と、超音波探触子を支持する支持体と、支持体を筒状構造物の半径方向に移動させる駆動機構と、を備え、駆動機構は筒状構造物外に設けられる筒状構造物の内部構造測定装置及び筒状構造物の内部構造測定方法を提供する。この発明によれば、超音波探触子と筒状構造物の被検査部位との接触に当たり、超音波探触子と被検査部位との密着性が向上し、非浸水式の超音波探傷に基づく測定を安定して行うことが可能となる。また、駆動機構を筒状構造物外に設けることで、筒状構造物内に導入される構成を小型化し、小径の筒状構造物についても測定が可能となる。【選択図】図５