To confirm the soundness of component of nuclear power plants, NDE techniques are applied. Especially, ECT is applied as the volumetric inspection for heat transfer tubes of heat exchangers, and as the surface inspection for weld zone. The materials of them have good corrosion resistance, but they had many experience of occurring flaw because plant-operating period became so longer. We developed various types of high performance ECT probe in order to detect every types of flaws which are occurred, and which...
英字タイトル:
History of development of high performance ECT probe applied in nuclear power plants

As for periodical measurement of pipe wall thinning, several concerns are indicated, such as unstability of measurement position and contact condition, additional work for removal of insulating material and preparing scaffold, unstability on complex geometry and difficulty of continuous monitoring under plant operation. In order to solve these concerns, we developed thin-film UT sensor which has high-temperature durability and flexibility. Furthermore, we preliminary developed prototype linear phased-a...
英字タイトル:
Monitoring of pipe wall thinning using high-temperature thin-film UT sensor