| 摘要 |
PROBLEM TO BE SOLVED: To easily and nondestructively perform inspection on defects or wall thickness by imaging a cross section of a heat transfer tube group under inspection irrespective of the material quality and structure of each heat transfer tube or the arranged state, etc. of a multitude of heat transfer tubes. SOLUTION: This heat transfer tube group inspection device is equipped with: radiation sources 16 installed in any one or more places inside a heat transfer tube 12, inside the heat transfer tube group 10, and outside the tube group; a radiation detector 18 fitted with a collimator 20 installed so as to make it possible to detect radiation emitted from the radiation sources outside the tube group all over the circumference thereof; and a CT processor 22 for CT-processing intensity signals on the radiation detected by the radiation detector. The cross-sections of the tube group comprising a multitude of arranged heat transfer tubes are imaged by means of the CT processing, thereby nondestructively inspecting the tube group. COPYRIGHT: (C)2005,JPO&NCIPI
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