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Shaking Table Testing of a Scaled Nuclear Power Plant Structure with Base Isolation

Authors :
Linlin Song
Xueming Zhang
Mingyang Wei
Yunlun Sun
Shicai Chen
Yan Chen
Source :
Science and Technology of Nuclear Installations, Vol 2023 (2023)
Publication Year :
2023
Publisher :
Hindawi Limited, 2023.

Abstract

To investigate the seismic performance and isolation effect of a high-temperature gas-cooled reactor, a 1/20 scale model including a reactor, a spent-fuel plant, and a nuclear auxiliary plant was fabricated. In addition, 220 mm lead-rubber bearings were designed and produced for use in the shaking table test, which included both isolated and nonisolated conditions. Two historical earthquake records and three artificial earthquake motions were used to input the ground motion in the tests. The results demonstrated that the seismic performance of the plant was better and that the structure was in an elastic state, under a safe shutdown earthquake event. Isolation bearings were found to effectively reduce the dominate frequency of the structure. The acceleration amplification factor of the superstructure was found to be less than 1. The isolation test results showed that the peak of the floor response spectrum at the pressure vessel support was less than 0.1 g. In the nonisolation test, the peak of the floor response spectrum was greater than 1 g. In the isolation test, the relative displacement of the structure was less than 1.1 mm, which was relatively small. The structure maintained a good isolation performance and exhibited improved safety under extreme ground motion.

Details

Language :
English
ISSN :
16876083
Volume :
2023
Database :
Directory of Open Access Journals
Journal :
Science and Technology of Nuclear Installations
Publication Type :
Academic Journal
Accession number :
edsdoj.fc6f9ccdbca48e3b2ca38d8e1ef5d64
Document Type :
article
Full Text :
https://doi.org/10.1155/2023/2536474