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http://dx.doi.org/10.5000/EESK.2013.17.1.021

Seismic Capacity Test of Nuclear Piping System using Multi-platform Shake Table  

Cheung, Jin-Hwan (Department of Civil and Environmental Engineering, Pusan National University)
Gae, Man-Soo (MIDAS IT)
Seo, Young-Deuk (Department of Civil and Environmental Engineering, Pusan National University)
Choi, Hyoung-Suk (Pusan National University Seismic Simulation Test Center)
Kim, Min-Kyu (Korea Atomic Energy Research Institute)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.17, no.1, 2013 , pp. 21-31 More about this Journal
Abstract
In this study, dynamic characteristics and seismic capacity of the nuclear power plant piping system are evaluated by model test results using multi-platform shake table. The model is 21.2 m long and consists of straight pipes, elbows, and reducers. The stainless steel pipe diameters are 60.3 mm (2 in.) and 88.9 mm (3 in.) and the system was assembled in accordance with ASME code criteria. The dynamic characteristics such as natural frequency, damping and acceleration responses of the piping system were estimated using the measured acceleration, displacement and strain data. The natural frequencies of the specimen were not changed significantly before and after the testing and the failure and leakage of the piping system was not observed until the final excitation. The damping ratio was estimated in the range of 3.13 ~ 4.98 % and it is found that the allowable stress(345 MPa) according to ASME criteria is 2.5 times larger than the measured maximum stress (138 MPa) of the piping system even under the maximum excitation level of this test.
Keywords
Piping system; Stainless steel; Elbow; Reducer; Shake table;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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