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An Ergonomic Analysis of Main Control Room Console in Nuclear Power Plant Based on Jack 5th

An Ergonomic Analysis of Main Control Room Console in Nuclea...

5th International Symposium on Software Reliability, Industrial Safety, Cyber Security and Physical Protection of Nuclear Power Plant, ISNPP 2020

作者： Li, Yu-Tong Liu, Ming-Ming Huang, Qing-Huai Gao, Nan Liu, Guan-Ron Zhou, Mao Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

ISBN: (纸本)9789811634550

In the process of human factor design and preliminary verification of the control room console in Nuclear Power Plant, traditional 2D human model design and analysis method is commonly used. However the results turn to be inaccurate and time-consuming. With the help of human simulation tool Jack, quick and precise analysis can be achieved. This paper puts forward the human factor engineering analysis of main control room console in nuclear power plant based on Jack including the visibility, accessibility, and collision detection. By comparing this method with traditional 2D design, conclusion can be drawn that Ergonomic Analysis of main control room console Based on Jack is more comprehensive and accurate, thus largely increasing the design efficiency and quality. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Nuclear power plants

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Research on Performance Optimization of Nuclear Power system Based on Improved Genetic Algorithm

Research on Performance Optimization of Nuclear Power System...

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作者： Yang, Bo Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institution of China Sichuan Chengdu China

According to the typical design of the secondary loop system of marine nuclear power plant, the physical model of the main components of the secondary circuit steam turbine, condenser, feed water pump and preheater is established by using the MATLAB software. The main performance parameters of the second loop are analyzed, and the efficiency calculation of simple Rankine cycle and Rankine cycle with exhaust gas is completed. The optimization direction of system parameters can be obtained by performance analysis. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Rankine cycle

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Structural design and Dynamic Analysis of Nuclear Safety DCS Cabinet with Light-Weight and Impact Resistance 5th

Structural Design and Dynamic Analysis of Nuclear Safety DCS...

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5th International Symposium on Software Reliability, Industrial Safety, Cyber Security and Physical Protection of Nuclear Power Plant, ISNPP 2020

作者： Dai, Jun-An Liu, Ming-Xing Wu, Xiao Chen, Zhi Wang, Dong-Wei Li, Fa-Qiang Yao, Chang-Wen Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

ISBN: (纸本)9789811634550

Safety digital control system (DCS) cabinet, as a carrier for the electronic devices, plays a significant role in ensuring the normal operation of the nuclear power plant. In this work, a design idea of impact resistant cabinet frame with high strength and low quality has been proposed. It adopts the design ideas such as flat frame section design, distributed multi-column layout, integrated structural and functional design and preservation of a certain safety margin, which can be used to guide the design of cabinet with high stiffness and strength, small column size and low weight. In addition, finite element analysis and impact response analysis of the designed cabinet are carried out by using ABAQUS-DDAM method. Results show that the designed cabinet is characterized by high stiffness, high strength and low weight, and the cabinet possesses good ability in resisting high level of impact. The design ideas proposed in this research can provide reference for the design of structural parts of other anti-shock electronic equipment. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Finite element method

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Reliability Verification Scheme for Safety Class DCS and Its Implementation in Nuclear Power Plant 5th

Reliability Verification Scheme for Safety Class DCS and Its...

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5th International Symposium on Software Reliability, Industrial Safety, Cyber Security and Physical Protection of Nuclear Power Plant, ISNPP 2020

作者： Liu, Ming-ming Chen, Yang He, Xian-jian Xu, Biao Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

ISBN: (纸本)9789811634550

system Availability, Rejection rate and Malfunction rate are vital technical indicators for safety class DCS when evaluating the reliability of the control system to meet technical requirements. This trend has attracted great attention of equipment manufacturers, regulatory agencies and users. Since there is no relevant standards or norms to guide the restriction at this stage, there is no unified verification idea in the industry. Although domestic and foreign equipment enterprises have tried relevant verification research, it still remains at the level of theoretical analysis and the confidence is not high. In the research of test method, if the traditional test simulation method is used for index verification, it often requires a lot of manpower, material resources and time. Therefore, this method is also regarded as inoperable, so it has not been able to form a reasonable and mature test of the verification scheme for a long time. Based on the general principle of reliability analysis, this paper makes a comparative analysis of the objects of reliability test, and proposes a reliability analysis verification and implementation scheme of safety class DCS. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Reliability analysis

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The Improvement and Validation of Laser Induced Fluorescence technology on Temperature and Concentration Measurement

SSRN

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SSRN 2024年

作者： Zhang, Qi Wang, Haoyu Li, Junlong Zhou, Yi Liu, Zhenhai Qi, Feipeng Li, Dongyang Tan, Sichao Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China Fundamental Science on Nuclear Safety and Simulation Technology Laboratory Harbin Engineering University Harbin150001 China

Laser induced fluorescence (LIF) is characterized as a non-insertion and whole-field measuring technology for the thermal-hydraulic analysis. This paper presents the details of LIF, including the basic principle, the main apparatus and the data process methods. The effects of the inhomogeneous laser sheet and ambient light are eliminated by the discretization of the camera pixels. A new data process method base on the empirical fitted polynomial is developed. The additional calibration test and the empirical fitted polynomial are combined for the simplification and optimization of the data process method. The results shows that the deviation in temperature measurement is within 0.5 ℃ for the improved method, and is within 1.0 ℃ for the conventional method. The concentration measurement error is within 5.67% for the improved method, and is about 7.10% for the conventional method. The new method proposed by this work makes LIF technology more convenient and accurate. © 2024, The Authors. All rights reserved.

关键词： Fluorescence

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Deep learning based fault diagnosis for chemical process with statistical feature fusion

Deep learning based fault diagnosis for chemical process wit...

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第42届中国控制会议

作者： Lei Zhang Hao Xia Bao Chao School of Control Science and Control Engineering Dalian University of Technology Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China

The existing fault diagnosis methods based on deep neural networks mostly rely on process data for fault classification and diagnosis,which makes it difficult to distinguish minor faults with similar data ***,this paper proposes a deep learning-based fault diagnosis model that combines statistical indicators and neural *** analyzing and calculating the relevant information entropy to screen the statistical signal features of time domain and frequency domain,we can extract more hidden information from the raw data,and use the convolutional autoencoder to compress the statistical indicators for feature extraction,and use CNN network to extract features from raw ***,the two sets of features are fused and input into the LSTM network to obtain temporal information for fault *** conducted on the Tennessee Eastman(TE)process show that the proposed model outperforms typical classifiers and improves the diagnostic accuracy of minor faults.

关键词：

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Interfacial ion regulation on 2D layered double hydroxide nanosheets for enhanced thermal insulation

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science China Chemistry 2022年第5期65卷 898-904页

作者： Chun Wang Hengyu Xu Han Cheng Hao Yu Si Liu Wenjie Wang Ruilin Yuan Hongfei Liu Tianpei Zhou Wangsheng Chu HengAn Wu Yi Xie Changzheng Wu Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaCAS Center for Excellence in Nanoscienceand CAS Key Laboratory of Mechanical Behavior and Design of MaterialsHefei 230026China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsCAS Center for Excellence in Complex System Mechanics University of Science and Technology of ChinaHefei 230027China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Exploring new strategies to broaden the upper/lower limit of thermal conductivity is of great interest to develop thermal management materials that can adapt to extreme *** this work,we employ an interfacial ion regulation to enhance the thermal insulation performance of 2D layered double hydroxide *** introduction of interfacial ion enlarges the interplanar spacing of Co(OH)_(2) nanosheets from 4.64 to 8.05 ?,which reduces phonon scattering length perpendicular to the two-dimensional plane and leads to enhanced interlayer thermal *** interfacial ion-regulated Co(OH)_(2)(named as Co(OH)_(2)-M^(x-)) exhibits 3-fold enhancement of thermal insulation through decreasing the thermal conductivity to as low as 0.15 W m^(-1) K^(-1),which is among the top values in 2D solid *** anticipate that interfacial ion regulation for 2D nanosheets paves a new avenue to break through the thermal insulation limit.

关键词： two dimensional materials interfacial ion regulation thermal conductivity phonon scattering

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Distributed finite-time event-triggered formation control based on a unified framework of affine image

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IEEE/CAA Journal of Automatica Sinica 2024年第6期12卷 1-3页

作者： Lin, Yan-Jun Yang, Yun-Shi Chai, Li Lin, Zhi-Yun Hangzhou Applied Acoustics Research Institute Hangzhou 310027 China College of Control Science and Engineering Zhejiang University Hangzhou 310027 China School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen 518055 and also with Peng Cheng Laboratory Shenzhen 518000 China

Dear Editor, This letter concentrates on distributed event-triggered formation control problems with finite-time convergence in an arbitrarily dimensional Euclidean space. A new unified approach of finite-time event-triggered formation control is proposed by steering all agents to a sliding manifold (the affine image) to achieve general formations, like affine, rigid or translational formation. It only requires to design an extra steering law driving at least d +1 leaders from an affine image to a rigid or translational image, where d is the dimension of the space. The event-triggered function is designed in a distributed and discontinuous manner based only on local information to reduce the communication and calculation resources by aperiodic sampling. In the proposed event-triggered formation law, zeno-free behavior is ensured. IEEE

关键词： Sliding mode control

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Experimental Investigation on Natural Circulation Characteristics of Core Make-Up Tank Under Rolling Conditions 29

Experimental Investigation on Natural Circulation Characteri...

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2022 29th International Conference on Nuclear Engineering, ICONE 2022

作者： Wang, Shuguang Zhang, Jinlei Shen, Ya'ou Liu, Xiaobo Ding, Shuhua Liu, Yusheng Li, Dongyang Tang, Jilin Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment Harbin Engineering University Harbin China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China Nuclear and Radiation Safety Center Beijing China

ISBN: (纸本)9780791886502

In the floating nuclear power plant, Core Make-up Tank (CMT) is one of the passive safety facilities, has been widely used in nuclear engineering. Under emergency conditions, natural circulation occurs and consequent thermal stratification appears in CMT system. However, rolling motion will directly affect the natural circulation and destroy the formation of thermal stratification, so there will be uncertain and unknown change of the safety injection capacity of CMT. Based on above analysis, this work carried out experiments under rolling conditions to reveal natural circulation and thermal stratification characteristics in CMT. A temperature detecting matrix formed by thermocouples is deployed in CMT. It is concluded that thermal stratification distribution is affected by the rolling conditions. Rolling conditions increase the thickness of thermal stratification and reduce the temperature gradient. The CMT natural circulation has two stages, the influence of rolling motion on the average flow in the first stage of natural circulation is very weak, but rolling motion will significantly affect the second stage of natural circulation and advance the decline time of direct vessel injection (DVI) flow rate. The transition time of natural circulation stage and the flow change in the second stage of natural circulation are related to the thermal stratification in CMT. The impact of rolling conditions should not be ignored when evaluating the performance of CMT. © 2022 by ASME.

关键词： Safety engineering

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Thermodynamic Analysis and Optimization of Nuclear Closed Air Brayton Cycle 1

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23rd Pacific Basin Nuclear Conference, PBNC 2022

作者： Fang, Huawei Yi, Jingwei Zhang, Xiaoyu Liang, Tiebo Qian, Yiran Tang, Xin Chen, Weixiong Key Laboratory of Nuclear Reactor System Design Technology Nuclear Power Institute of China Sichuan Chengdu China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Shaanxi Xi’an China

ISBN: (数字)9789811988998

ISBN: (纸本)9789811988981

In order to improve the flexibility and adaptability of micro nuclear power systems, air is considered as an optional working fluid of nuclear Brayton cycle. It has ability to avoid shortage of working fluid under extreme conditions, and ensure the system operating with tight supply. Compared with the traditional open cycles, the closed cycle has advantages of higher cycle efficiency, smaller equipment size and higher power density. Few of closed air power cycle in nuclear power system has been studied by now. In this paper, cycle parameters were analyzed and designed, and optimal cycle performance was compared between cycle constructions. Four closed air Brayton cycles are proposed and modeled in EBSILON 15.0, including simple regenerative cycle (SRC), intercooling regenerative cycle (IRC), reheat regenerative cycle (RRC) and intercooling-reheat regenerative cycle (IRRC). Thermodynamic analysis of the key parameters is conducted, including pressure ratio, turbine inlet temperature, compressor inlet temperature and pressure. In addition, the genetic algorithm (GA) is applied for multi-parameters optimization for the maximal cycle efficiency. Result shows that with the increase of pressure ratio, the efficiency of SRC increases firstly and then decreases. With the increase of turbine inlet temperature, the pressure ratio corresponding to the maximal cycle efficiency increases gradually. Specific work gradually increases with pressure ratio. In higher turbine inlet temperature, the rising velocity of specific work is faster. Cycle efficiency increases with compressor inlet pressure, and this trend tend to be slower in high pressure region. With the increasing of compressor inlet pressure, optimal pressure ratio decreases and finally approaches to 2.0. The cycle minimal cycle pressure was selected as 6 MPa. Maximal efficiency and corresponding pressure ratio increase with turbine inlet temperature increasing and decrease with compressor inlet temperature increasing. Co

关键词： Air

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