Design modification and shaking table test of the drain pipes of steam generator for vibration reduction
| Autor: | Yong-Ho Heo, Seung-Hwan Oh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
020209 energy education 02 engineering and technology Low frequency 01 natural sciences 010305 fluids & plasmas law.invention law 0103 physical sciences Nuclear power plant 0202 electrical engineering electronic engineering information engineering General Materials Science Safety Risk Reliability and Quality Waste Management and Disposal business.industry Mechanical Engineering Boiler (power generation) Structural engineering Nuclear power Coolant Vibration Nuclear Energy and Engineering Earthquake shaking table Environmental science Electricity business |
| Zdroj: | Nuclear Engineering and Design. 340:68-72 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2018.09.025 |
| Popis: | The drain pipe of the steam generators in nuclear power plants is designed to remove the remaining reactor coolant when the nuclear power plant stops. In the normal electricity generating condition of the nuclear power plant, the drain pipe acts as the pressure boundary between the primary coolant system and outside, which forbids the radioactive coolant to be leaked. Therefore, it is important to assure the structural integrity of the drain pipe, which is closely related with the vibration characteristics of the drain pipe. In this paper, the vibration characteristics of the previous and newly designed drain pipes are investigated by simulation and measurement with the shaking table test. The purpose of the new design was to suppress the excessive vibration in the interested low and high frequency ranges, which were observed in the power uprating of plants. From the measured results, in y direction, the first three modal frequencies are increased by 5, 18, and 50 Hz in the low frequency region, and the higher order modes are excluded in the interested high frequency region with the adoption of the new design. Further design modification is required to reduce the high frequency vibration in x direction with other approaches. In general, it is expected from the result that the newly designed drain pipe is more robust to the existing vibration compared with the previous one. |
| Databáze: | OpenAIRE |
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