COMPARATIVE EVALUATION OF THE USE OF VARIOUS CODES WHEN PERFORMING THE CALCULATION TOTAL SETTLEMENT OF THE REACTOR BUILDING NUCLEAR POWER PLANTS IN COHESIVE SOILS

Increasing energy demand urge the developing countries to consider different types of energy sources. Owing the fact that the energy production capacity of renewable energy sources is lower than a nuclear power plant, developed countries like US, France, Japan, Russia and China lead to construct nuclear power plants. These countries compensate 80% of their energy need from nuclear power plants. Further, they periodically conduct tests in order to assess the safety of the existing nuclear power plants by applying impact type loads to the structures. In this study, a sample third-generation nuclear reactor building has been selected to assess its seismic behavior and to observe the crack propagations of the prestressed outer containment. First, a 3D model has been set up using ABAQUS finite element program. Afterwards, modal analysis is conducted to determine the mode shapes. Nonlinear dynamic time history analyses are then followed using an artificial strong ground motion which is compatible with the mean design spectrum of the previously selected ground motions that are scaled to Eurocode 8 Soil type B design spectrum. Results of the conducted nonlinear dynamic analyses are considered in terms of stress distributions and crack propagations.

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Outline of current analysis procedure for CANDU 600 MW reactor buildings

Canadian Journal of Civil Engineering ◽

10.1139/l85-093 ◽

1985 ◽

Vol 12 (4) ◽

pp. 796-804

Author(s):

J. C. Mamet ◽

O. Moselhi

Keyword(s):

Prestressed Concrete ◽

Nuclear Power ◽

Power Plants ◽

Nuclear Power Plants ◽

Nuclear Reactor ◽

Operating Conditions ◽

System Control ◽

Current Analysis ◽

Analysis Process ◽

Reactor Building

Reactor buildings of 600 MW CANDU nuclear power plants consist of a prestressed concrete containment structure, cylindrical in shape with a double spherical dome, and of a reinforced concrete internal structure with heavy walls and slabs that support the nuclear reactor, the primary heat transport system, control and safety mechanisms, etc. Both structures are supported on a common circular slab.In this paper, an outline of the static and seismic response analyses performed for these buildings is presented. Several computer models and codes are used and advantage is taken of the symmetry of revolution of part of the structure.By combining the results produced by the various models and accounting for discontinuities caused by openings, etc., a complete picture of the forces, displacements, or accelerations existing in the reactor building under operating conditions and during postulated accidents or seismic events may be drawn.This process has been partly automated by the development of relevant software. A flow chart of the whole analysis process is given. Key words: nuclear power plants, reactor building, containment, analysis, static, seismic, finite elements.

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Labor costs management in the large-block construction of NPP

E3S Web of Conferences ◽

10.1051/e3sconf/202126302040 ◽

2021 ◽

Vol 263 ◽

pp. 02040

Author(s):

Andrey Morozenko ◽

Alexey Shashkov

Keyword(s):

Power Plant ◽

Nuclear Power Plant ◽

Nuclear Power ◽

Power Plants ◽

Nuclear Power Plants ◽

Large Block ◽

Labor Costs ◽

Industrial Enterprises ◽

Reactor Building ◽

Block Construction

The article continues the research of the features of the use of prefabricated cast-in-place structures in the construction of nuclear power plants (NPP), the organizational and economic feasibility of the use of prefabricated cast-in-place structures in the implementation of new projects for the construction of nuclear power plants. The estimation of labor costs and resource costs of installation of large-block structures for the reactor building of the NPP was made. The dependence of labor costs for the installation of reinforced blocks, depending on the share of using reinforced blocks during the construction of the reactor building of a nuclear power plant, was obtained. The dependence of the overall labor costs for the industrial production and installation of reinforced blocks, depending on the share of using reinforced blocks during the construction of the reactor building of a nuclear power plant, was obtained. Graphical representations of dependencies are illustrated. The main daily resource consumption for the installation of reinforced blocks during large-block construction has been analytically calculated. The data on the required shares of labor costs at industrial enterprises and at the construction site in percentage terms were obtained. The conclusion is made about the rational use of large-block construction in the implementation of NPP construction projects.

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A Remote Operated Quadruped Robot System for Investigation of Reactor Building

Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Plant Systems, Structures and Components; Codes, Standards, Licensing and Regulatory Issues ◽

10.1115/icone22-30304 ◽

2014 ◽

Author(s):

Naotaka Suganuma ◽

Takuya Uehara ◽

Kenji Matsuzaki ◽

Makoto Ochiai ◽

Fujio Terai ◽

...

Keyword(s):

Nuclear Power ◽

Power Plants ◽

Nuclear Power Plants ◽

Control Method ◽

Quadruped Robot ◽

Polluted Environment ◽

Robot System ◽

Operation System ◽

Reactor Building ◽

Fukushima Daiichi

A remote operated quadruped robot has been developed for disaster site which can move on stairs, slopes, and uneven floor under the radiation-polluted environment, such as TEPCO Fukushima Daiichi nuclear power plants [1][2]. In particular, the control method for stable walking and the remote operation system have been developed to move on stairs in the reactor building. We applied this robot to investigation of suspicious water leakage points in reactor building at Fukushima Daiichi nuclear power plants unit2[3]. In this investigation, a small vehicle equipped with camera and a manipulator which is connected the vehicle with cable were mounted on the robot and were carried to near the target by the quadruped robot and the investigation was carried out with the small vehicle.

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