Seismic structural responses reduction of double-layered containment nuclear power plant via BIS-TMD

Abstract

Purpose In recent years, a new type of double-layered containment structure of nuclear power plant has been built in China, named ACP1000 NNP. This paper aims to propose a new method to mitigate the seismic responses of this type of the structure. Design/methodology/approach The new base isolation structure (BIS)- tuned mass damper (TMD) structure was proposed and implemented only by modifying the connection between various components of NPPs, and the application of this concept design in ACP1000 was skillfully realized. Findings The new structure adopts the combination of structural form and function, adopts appropriate amplification of the seismic response of the secondary component, possesses advantages in explicit damping mechanism, good damping effect, robustness of seismic structures, simple implementation process, etc., and meets the special seismic safety requirements of the NPPs. Originality/value This seismic and hazard mitigation and BIS-TMD structure can avoid the risk of ACP1000 accidents caused by horizontal earthquakes.

Seismic response of a nuclear island building with base isolation considering the soil–structure interaction effect

“…Over the past few decades, at least four NPP accidents that exceeded the seismic design level have been recorded in Japan alone. 1 Seismic response analysis of nuclear island (NI) buildings is key work of structural design of NPPs. As the stiffness and weight of NPP buildings are significant and the soil of sites is relatively soft, the soil-structure interaction (SSI) effect for the seismic response analysis of NPPs has become an important issue.…”

“…Although this isolation technology has been widely deployed for industrial and civil buildings, bridges, and certain types of infrastructure, its application in NPPs is limited. The main reasons for the limited use of seismic isolation technology in NPPs, its development, and future research needs have been presented and identified in numerous papers 1,8,9 . Among all NPPs currently in commercial operation worldwide, only Koeberg in South Africa and Cruas in France have adopted this base isolation technology, wherein neoprene rubber bearings, including flat sliders in some installations, have been used to isolate the horizontal components of ground motion 10,11 .…”

Study of isolation effectiveness of nuclear reactor building with three-dimensional seismic base isolation

“…In the traditional seismic design of structures, the seismic resistance of structures is enhanced by increasing the strength of the structural components. More recently, several new passive and active techniques have been developed to reduce the impact of earthquakes (Domenico et al , 2020a; Peng et al , 2019; Domenico and Ricciardi, 2018; Hou et al , 2020; Domenico et al , 2020b; Matteo et al , 2018), one of which is to equip structures with seismic base isolation systems to reduce the seismic demand of structures (Petti et al , 2010; Domizio et al , 2015; Kelly, 2008). The seismic base isolation system has been studied and developed extensively in the last few decades by several research institutions and has emerged as one of the most effective strategies to protect infrastructure from seismic hazards, especially in high seismic regions (Domenico et al , 2020c; Markou et al , 2018; Luca and Guidi, 2019, 2020).…”

“…Amongst all NPPs currently in commercial operation worldwide, only Koeberg in South Africa and Cruas in France have adopted the base isolation technology, in which neoprene rubber bearings, including flat sliders in some installations, have been used to isolate the horizontal components of ground motion (Coladant, 1991; Lo Frano, 2018). The main reasons for the limited use of seismic isolation in NPPs, its development and future research needs have been presented and identified in numerous papers (Hou et al , 2020; Whittaker and Kumar, 2014; Whittaker et al , 2018). Based on many new theories and techniques, the base isolation of NPPs in the horizontal direction has been widely studied.…”

“…In addition, earthquakes are one of the most severe natural disasters that threaten the safety of nuclear power plants (NPPs). Over the past few decades, there have been at least four recorded NPP accidents that exceeded the seismic design level in Japan alone (Hou et al , 2020). Although isolation technology has been widely deployed for industrial and civil buildings, bridges and certain classes of infrastructure, the application of base isolation technology in NPPs is limited.…”