2022 Annual Meeting

Presentation information

Oral presentation

IV. Nuclear Plant Technologies » 401-2 Operational Management, Inspection and Maintenance of Reactor

[1F07-11] Advanced Technology for Inspection and Maintenance of Nuclear Reactors

Wed. Mar 16, 2022 2:45 PM - 4:10 PM Room F

Chair: Tetsuya Uchimoto (Tohoku Univ.)

3:30 PM - 3:45 PM

[1F10] Study on Check Valve Diagnosis using AI (2)

*Yoshihiro Isobe1, Ryota Ogawa1, Takashi Matsunaga1, Motomu Ishii1, Hiroaki Fujiyoshi1, Mitsuyuki Sagisaka1 (1. NFI)

Keywords:check valve, leakage, AI, preventive maintenance, AE sensor

We have developed a check valve diagnostic system using a portable acoustic measurement device with AE (Acoustic
Emission) sensors. Moreover, AI (Artificial Intelligence) system has been introduced to sophisticate the signal analysis. In the previous report, the measured signals when the leak amount was gradually increased from sound status in the experimental loop were learned and verified by CNN (convolutional neural network). In this report, as part of preventive maintenance, we examined the detection of gradual deterioration simulations before leakage.