INFLUENCE OF DIFFERENT TYPES OF ISOLATION BEARINGS ON ISOLATION PERFORMANCE OF NUCLEAR ISLAND PLANT

REN Guopeng; PAN Rong; SUN Feng; GUO Xing

doi:10.13204/j.gyjzG21101113

Volume 51 Issue 12

May 2022

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REN Guopeng, PAN Rong, SUN Feng, GUO Xing. INFLUENCE OF DIFFERENT TYPES OF ISOLATION BEARINGS ON ISOLATION PERFORMANCE OF NUCLEAR ISLAND PLANT[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(12): 41-48. doi: 10.13204/j.gyjzG21101113

Citation:

REN Guopeng, PAN Rong, SUN Feng, GUO Xing. INFLUENCE OF DIFFERENT TYPES OF ISOLATION BEARINGS ON ISOLATION PERFORMANCE OF NUCLEAR ISLAND PLANT[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(12): 41-48. doi: 10.13204/j.gyjzG21101113

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INFLUENCE OF DIFFERENT TYPES OF ISOLATION BEARINGS ON ISOLATION PERFORMANCE OF NUCLEAR ISLAND PLANT

doi: 10.13204/j.gyjzG21101113

Nuclear and Radiation Safety Center, Ministry of Ecology and Environment, Beijing 100082, China

Received Date: 2021-10-11
Available Online: 2022-05-27

Abstract

Abstract

Taking the nuclear island plant of a million kilowatt PWR nuclear power plant as the research object, using the overall isolation technical scheme of nuclear island raft foundation, the seismic response of nuclear island plant with three common types of base isolation bearings, including multi lead-core rubber bearing(MLRB), eradi quake system bearing(EQS), triple friction pendulum bearing(TFPB), was compared and analyzed under different periods of ground motions. The floor acceleration response spectrum of the above structure considering the effect of soil-structure interaction (SSI) was discussed. The analysis results showed that the isolation performance of TFPB under short period ground motion was better than that of the other two types of isolation bearings. The MLRB could meet the requirements of isolation performance under different periodic ground motions. Based on the influence analysis of homogeneous foundation soil, the SSI effect of non-isolated structure was significantly greater than that of isolated structure, and the SSI effect of isolated structure was less than 5%. The floor response spectrum of isolated structure with EQS or TFPB considering SSI effect could not be completely enveloped by the floor response spectrum without considering SSI effect in low frequency stage.
- base isolation,
- nuclear power plants,
- isolation bearing,
- seismic response,
- soil-structure interaction(SSI) effec

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References(17)

References

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