Vibration analysis of third generation nuclear power plant considering soil‐structure‐interaction effect under the impact of large commercial aircraft

2020 ◽  
Vol 29 (16) ◽  
Author(s):  
Jianbo Li ◽  
Runyu Mei ◽  
Yougang Wang ◽  
Gao Lin ◽  
Rong Pan
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Vibration Analysis ◽  
Nuclear Power ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Third Generation ◽  
Commercial Aircraft ◽  
Structure Interaction ◽  
The Impact

Assessment of Spatial Property Variability of the Subsurface in SSI Studies of the Armenian Nuclear Power Plant

2004 ◽  
Author(s):  
Nicholas Simos ◽  
Paruyr Zadoyan ◽  
Pierre Labbe ◽  
Pierre Sollogoub ◽  
J.-Pierre Touret
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Soil Structure ◽  
Soil Layer ◽  
Soil Structure Interaction ◽  
Foundation Soil ◽  
Element Discretization ◽  
Structure Interaction ◽  
The Impact

This paper addresses issues surrounding soil property variability including uncertainties associated with “best estimate” values and searches for practical ways to assess the impact on the seismic response of a facility, such as a nuclear power plant, resting on it. Specifically, it attempts, using a parametric study, to formulate a probabilistic model that enables the enveloping of uncertainties associated with the soil-structure-interaction component of the seismic problem. The effects of most-likely sources of uncertainty, such as variability of “distinct” soil layer profile and variability of controlling soil properties, are to be addressed by generating a probabilistic profile in which randomization of key parameters that appear to have the most impact on the results of deterministic analyses is implemented. The use of stochastic finite elements and the introduction of correlation functions, in conjunction with finite element discretization of the foundation soil, are explored as means of achieving an enveloped structural response. The on-going evaluation of the Armenian nuclear plant site prompted this study. In order to stress the importance and relevance of the stated goal, the soil-structure-interaction of the nuclear power plant, subject to significant variation of the foundation soil, is examined. The conflicting results of two independent studies of the subsurface provide the basis for the variation range used in this study.

Response Spectrum Analysis of the Condensate Storage Tank in a Nuclear Power Plant

2013 ◽  
Vol 284-287 ◽  
pp. 1421-1425
Author(s):  
Wei Ting Lin ◽  
Meng Hsiu Hsieh ◽  
Yuan Chieh Wu ◽  
Chin Cheng Huang
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Computer Model ◽  
Storage Tank ◽  
Nuclear Power ◽  
Soil Structure ◽  
Response Spectrum ◽  
Soil Structure Interaction ◽  
Storage Tanks ◽  
Structure Interaction

Following the nuclear power plant accident in Fukushima Japan, seismic capacity evaluation has become a crucial issue in combination building safety. Condensate storage tanks are designed to supplies water to the condensate transfer pumps, the control rod drive hydraulic system pumps, and the condenser makeup. A separate connection to the condensate storage tank is used to supply water for the high pressure coolant injection system, reactor core isolation cooling system, and core spray system pumps. A condensate storage tank is defined as a seismic class I structure, playing the important role of providing flow to the operational system and the required static head for the suction of the condensate transfer pumps and the normal supply pump. According to the latest nuclear safety requirements, soil structure interaction must be considered in all seismic analyses. This study aims to rebuild the computer model of condensate storage tanks in Taiwan using the SAP 2000 program in conjunction with the lumped mass stick model and to evaluate the soil structure interaction by employing the SASSI 2000 program. The differences between the results with the soil structure interaction and spring model are compared via natural frequency and response spectrum curves. This computer model enables engineers to rapidly evaluate the safety margin of condensate storage tank following the occurrence of earthquakes or tsunamis.

Case Study: Effect of Soil-Structure Interaction and Ground Motion Incoherency on Nuclear Power Plant Structures

2009 ◽  
Author(s):  
Jim Xu ◽  
Sujit Samaddar
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Seismic Response ◽  
Ground Motion ◽  
Nuclear Power ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Soil Conditions ◽  
Structure Interaction

The soil-structure interaction (SSI) has a significant impact on nuclear power plant (NPP) structures, especially for massive and rigid structures founded on soils, such as containments. The U.S. Nuclear Regulatory Commission’s (NRC) Standard Review Plan (SRP) provides the requirement and acceptance criteria for incorporating the SSI effect in the seismic design and analyses of NPP structures. The NRC staff uses the SRP for safety review of license applications. Recent studies have indicated that ground motions in recorded real earthquake events have exhibited spatial incoherency in high-frequency contents. Several techniques have been developed to incorporate the incoherency effect in the seismic response analyses. Section 3.7.2 of Revision 3 of the SRP also provided guidance for use in the safety evaluation of seismic analyses considering ground motion spatial incoherency effect. This paper describes a case study of the SSI and incoherency effects on seismic response analyses of NPP structures. The study selected a typical containment structure. The SSI model is generated based on the typical industry practice for SSI computation of containment structures. Specifically, a commercial version of SASSI was used for the study, which considered a surface-founded structure. The SSI model includes the foundation, represented with brick elements, and the superstructure, represented using lumped mass and beams. The study considered various soil conditions and ground motion coherency functions to investigate the effect of the range of soil stiffness and the ground motion incoherency effect on SSI in determining the seismic response of the structures. This paper describes the SSI model development and presents the analysis results as well as insights into the manner in which the SSI and incoherency effects are related to different soil conditions.

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