Fine magnetic particles having UV fluorescence are commonly used in magnetic crack detection technique. Stress corrosion cracking sometimes happens in nuclear power plants. To apply this technique to maintain the heat exchanger tubes, it is desired that these particles has performance to be collected with ease. To c ollect these fine magnetic particles from millimeter size crack depth, a chemosynthesis technique to produce the micro capsules successfully produced hundreds micron sized capsules containing t...
英字タイトル:
A fluorescent micro capsule manufacture of magnetic particle testingfor advanced inspection technique of heat exchanger tube

In Japan there are a lot of aging plants which have wearing parts and wall thinning pipes and require major maintenance and repairs. The efficient method is required to repair all of them in various spaces. A new type of three-dimensional measurement systems based on Conoscopic Holography is steadily gaining ground against older techniques. We measured the shape of the piping inner wall by using the Conoscopic Holography Scope. The laser welding position of the piping inner wall could be confirmed by...
英字タイトル:
Development of the tube inner wall inspection technology