炉内点検技術と高経年化プラントへの適用
Inspection Technologies for Reactor Internals of Aged Nuclear Power Plants
著者:
山本 智 Satoshi YAMAMOTO 平澤 泰治 Taiji HIRASAWA 大坪 徹 Tooru OOTSUBO 落合 誠 Makoto OCHIAI 坂口 正武 Masatake SAKAGUCHI 亀山 育子 Ikuko KAMEYAMA
発刊日:
公開日:
Laser-ultrasonic testing (Laser-UT)Phased array ultrasonic testingReactor internalsRemote operated vehicle (ROV)Stress corrosion cracking (SCC)Ultrasonic testing (UT)
概要
The request of the inspection to reactor internals is increasing with application of the Japanese operation and maintenance code to aged nuclear power plants. Toshiba has developed many outstanding under water inspection t echnologies combined with ultrasonic testing (UT) techniques and remote operated vehicles (ROVs) technologies. Water gap phased array UT technique is capable to apply to all internals including complicated form part such a s reactor bottom head penetration weldment. Laser-ultrasonic testing (Laser-UT) technique is applied to the surface examination (crack detection and depth sizing) before preventive maintenance. Moreover, newly developed RO Vs realize to deliver the UT sensors and TV camera accurately to the required position in reactor. The outline of inspection technologies for reactor internals and their applications in nuclear power plants are described.
