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

2020 ◽  
Vol 37 (6) ◽  
pp. 2111-2125
Author(s):  
Gangling Hou ◽  
Yu Liu ◽  
Meng Li ◽  
Menghan Sun ◽  
Feng Sun ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Base Isolation ◽  
Implementation Process ◽  
Concept Design ◽  
Seismic Safety ◽  
Content Type ◽  
Form And Function ◽  
And Function

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.

Current status of design basis earthquake level for nuclear power plant sites in several countries

2021 ◽  
Author(s):  
Hoseon Choi ◽  
Seung Gyu Hyun
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
South Korea ◽  
Seismic Activity ◽  
Nuclear Power ◽  
Current Status ◽  
Seismic Safety ◽  
Design Basis ◽  
Design Earthquake ◽  
Design Construction

<p>According to strict criteria step by step for site selection, design, construction and operation, the seismic safety of nuclear power plant (NPP) sites in South Korea are secured by considering design basis earthquake (DBE) level capable of withstanding the maximum ground motions that can occur on the site. Therefore, it is intended to summarize DBE level and its evaluation details for NPP sites in several countries.</p><p>Similar but different terms are used for DBE from country to country, i.e. safe shutdown earthquake (SSE), design earthquake (DE), SL2, Ss, and maximum calculated earthquake (MCE). They may differ when applied to actual seismic design process, and only refer to approximate comparisons. This script used DBE as a representative term, and DBE level was based on horizontal values.</p><p>The DBE level of NPP sites depends on seismic activity of the area. Japan and Western United States, where earthquakes occur more frequently than South Korea, have high DBE values. The DBE level of NPP sites in South Korea has been confirmed to be similar or higher compared to that of Central and Eastern Unites Sates and Europe, which have similar seismic activity.</p>

Community relations dealing with a not in my back yard (NIMBY) context

2016 ◽  
Vol 27 (3) ◽  
pp. 424-452 ◽  
Author(s):  
Wonjun Chung ◽  
Jinbong Choi ◽  
Chang Wan Woo ◽  
Soobum Lee ◽  
Christina E. Saindon
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Social Exchange ◽  
Nuclear Power ◽  
Social Exchange Theory ◽  
Interactive Effect ◽  
Community Relations ◽  
Theoretical Frameworks ◽  
Content Type ◽  
Community Activities

Purpose This paper investigates whether building a nuclear power plant in a community would inherently bring local conflict phenomena such as “not in my back yard (NIMBY)”, focusing especially on the interactive effect between different types of local publics and their exposure to either a supportive or opposing message about a hypothetical local governmental plan to build a nuclear power plant on community participation intentions. Design/methodology/approach Applying the two theoretical frameworks (situational theory of publics and social exchange theory) to NIMBY, this study used a quantitative approach by using 471 participants in a 4 (publics: active, aware, aroused or inactive) × 2 (advocacy message type: supportive or opposing message) experimental design. Findings The results showed that regardless of message types, active publics were more likely to participate in community activities than any other public, but this group strongly opposed the harmful facility, while inactive publics continued to be inactive. However, aware and aroused publics were significantly influenced by messages. Originality/value The rationale and findings of this research are original, as they have not been published previously, and are not being simultaneously submitted elsewhere. This research should contribute to the broad body of knowledge and practices in community-based conflict issues in terms of risk management. It is believed that the discussion and implications of the findings should raise interesting areas for further research.

Seismic Analysis for an Explosion-Proof Valve Used in Nuclear Power Plant

2017 ◽  
Author(s):  
Juan Luo ◽  
Jiacheng Luo ◽  
Lei Sun
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Seismic Analysis ◽  
Nuclear Safety ◽  
Seismic Load ◽  
Seismic Safety ◽  
Stress Evaluation ◽  
Safety Standards ◽  
Stress And Deformation

Nuclear class equipment should be assessed for seismic safety before they are used in nuclear power plant. According to nuclear safety codes and regulations, all seismic category I equipments shall be designed enduring safety shutdown earthquake (SSE). That is, the stress evaluation needs to be accomplished for those structures. For some components, the deformation evaluation needs to be performed as well to assure the function integrity of the equipment. In this paper, the seismic analysis for an explosion-proof valve used in nuclear power plant, which exactly belongs to seismic category I equipment, has been conducted based on finite element method. The natural frequency, vibration mode and seismic response of the structure have been obtained through calculation, and the stress and deformation under the combined loadings of gravity, internal pressure, blast and seismic load have been evaluated according to ASME AG-1. The bolts of the structure have been qualified according to ASME III-NF as well. The results show that the design of the explosion-proof valve is in compliance with the requirement of corresponding nuclear safety standards.

Probabilistic seismic safety study of an existing nuclear power plant

1980 ◽  
Vol 59 (2) ◽  
pp. 315-338 ◽  
Author(s):  
R.P. Kennedy ◽  
C.A. Cornell ◽  
R.D. Campbell ◽  
S. Kaplan ◽  
H.F. Perla
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Safety Study ◽  
Seismic Safety

Russia will drop nuclear plans unless Turks buy in

2016 ◽  
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Air Force ◽  
Nuclear Power ◽  
Nuclear Plant ◽  
Content Type ◽  
Bilateral Relations

Subject The Akkuyu nuclear plant that Turkey is building with Russia's Rosatom. Significance Since the Turkish air force downed a Russian warplane last November, bilateral relations have plunged to an all-time low. Rumours persist that Moscow has frozen funding for the Akkuyu nuclear power plant (NPP) and is unwilling to complete the project unless it can share the risk. Impacts Continued development would be an added incentive for Ankara and Moscow to repair relations. Abandoning the project would further strain relations between Ankara and Moscow. Turkey may look for other developers to complete the NPP while prioritising other forms of power generation.

The Comparison Research About Two Reliability Management Methods in AP1000 Design

2017 ◽  
Author(s):  
Zhixin Xu ◽  
Chengzhang Wang ◽  
Jingjing Liu
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Implementation Process ◽  
Power Production ◽  
Classification Method ◽  
Reliability Management ◽  
Equipment Reliability ◽  
Comparison Research ◽  
R Classification

As a kind of Generation-III passive nuclear power plant, AP1000 has applied two kinds of equipment reliability management methods: the equipment Power Production Reliability Classification (R-Classification) method and Design-Reliability Assurance Program (D-RAP). To invest these two methods, the comparison is implemented between the classification principles, judgment basis and implementation process. According to the RCS and CVS systems, the R-Classification and D-RAP results are compared and some suggestions to enhance the NPP reliability managements are proposed.

Approach to Assess Influence of Earthquake-Induced Slope Collapse on Nuclear Power Plant Facilities

2018 ◽  
Vol 12 (04) ◽  
pp. 1841011
Author(s):  
Susumu Nakamura ◽  
Ikumasa Yoshida ◽  
Masuhiro Beppu
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Limit State ◽  
Landslide Risk ◽  
Total Probability ◽  
Assessment Procedure ◽  
Limit States ◽  
Seismic Safety ◽  
Slope Collapse

As a result of the disaster of nuclear power plant caused by the 2011 off the pacific coast of Tohoku Earthquake, establishment of a method to estimate the influence of slopes on the seismic safety of nuclear facilities has become necessary. The creation of such a method can yield important information regarding potential risk as well as risk management regarding seismic safety. The existing guidelines used to evaluate landslide risk provide guidance for landslide zoning as well as how landslide risk can be reduced and avoided. According to these guidelines, either people or houses are typically used as targets of risk evaluation. Particularly, for a specific slope, it is necessary to evaluate the damage of the potentially affected structures quantitatively and systematically. Therefore, the definition and basic assessment procedure of three limit states (stability limit, reachable limit and damage limit) are herein described. Furthermore, an evaluation case for a slope model describes the influence of slope collapse due to an earthquake. In this case, the fragility curves, as well as the occurrence probability for each limit state are described and an evaluation example is provided. Regarding new ideas and methods to evaluate the conditional reachable probability and the conditional damage probability as well as a method to evaluate the total probability of all three limit states are proposed. From the results obtained in our example case, it is found that systematical assessment of the risk information of facilities damaged due to slope collapse is useful, and is made possible via numerical analysis.

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