Vol. 52 No. 4 (2015)   New Products & Technologies
Technical Papers

Non Destructive Inspection Technology for Thermal Power Plants

MIKIYASU URATA
KIYOTAKA AOKI
NAOYA URATA
KOICHI TAGAMI
MANABU KONDO
SHINTARO MATSUMOTO

In boiler facilities for thermal power plants, various types of damage may occur from rapid load change or as a result of the operation mode. Therefore, Mitsubishi Hitachi Power Systems, Ltd. has developed non-destructive inspection technologies which enable the accurate and timely detection of damage and has been promoting the application of these technologies to maintenance work for actual boiler facilities. In this article, the outlines of the following developed inspection technologies and the future prospects are described: thickness measuring technique by inner UT/cable-less inner UT, corrosion thinning part inspection technique using tube-inserted ECT, creep damage detection technique using phased-array UT, and thickness monitoring technique using thin film UT.