| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
The wall thickness of the pipes used in the plant is reduced by the effect of the internal flow during long-term use, which may eventually lead to an accident. In this study, a method to monitor the state of wall thinning using the DC potential difference method for both cases of uniform wall thinning and local wall thinning was developed. This method utilizes a plurality of electrode terminals equidistantly attached on the outer surface of the pipe. A constant DC current is supplied between the two outer terminals, and the change in wall thickness is evaluated from the change in potential differences measured between the other terminals. Based on electric field analysis using the finite element method, a practical method that can easily evaluate wall thickness was proposed.
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