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2022 29th International Conference on Nuclear Engineering, ICONE 2022

作者： Wang, Qingtian Cao, Rui Zhang, Xianjun Science and Technology on Reactor System Design Technology Laboratory Chengdu China Nuclear Power Institute of China Chengdu China

ISBN: (纸本)9780791886458

In view of the quality problems of manual TIG coating of cobalt-based alloy, the Laser Additive Manufacturing process was studied, especially the optimization of process parameters. Then a series of experiments were carried out on the cobalt-based alloy Additive Manufacturing layer and compared with the traditional manual TIG coating layer. The results show that the microstructure, the hardness, the wear resistance and corrosion resistance are better than. Copyright © 2022 by ASME.

关键词： Microstructure

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Kinematics and Dynamics Analysis of a Quadruped Walking Robot with Parallel Leg Mechanism

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Chinese Journal of Mechanical Engineering 2013年第5期26卷 881-891页

作者： WANG Hongbo SANG Lingfeng HU Xing ZHANG Dianfan YU Hongnian Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Xi’an University of Architecture and Technology Science and Technology Research Institute Yanshan University School of Design Engineering and ComputingBournemouth University

It is desired to require a walking robot for the elderly and the disabled to have large capacity,high stiffness,stability,***,the existing walking robots cannot achieve these requirements because of the weight-payload ratio and simple ***,Improvement of enhancing capacity and functions of the walking robot is an important research *** to walking requirements and combining modularization and reconfigurable ideas,a quadruped/biped reconfigurable walking robot with parallel leg mechanism is *** proposed robot can be used for both a biped and a quadruped walking *** kinematics and performance analysis of a 3-UPU parallel mechanism which is the basic leg mechanism of a quadruped walking robot are conducted and the structural parameters are *** results show that performance of the walking robot is optimal when the circumradius R,r of the upper and lower platform of leg mechanism are 161.7 mm,57.7 mm,*** on the optimal results,the kinematics and dynamics of the quadruped walking robot in the static walking mode are derived with the application of parallel mechanism and influence coefficient theory,and the optimal coordination distribution of the dynamic load for the quadruped walking robot with over-determinate inputs is analyzed,which solves dynamic load coupling caused by the branches’ constraint of the robot in the walk *** laying a theoretical foundation for development of the prototype,the kinematics and dynamics studies on the quadruped walking robot also boost the theoretical research of the quadruped walking and the practical applications of parallel mechanism.

关键词： walking robot parallel leg mechanism kinematics dynamics over-determinate inputs

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Safety assessment of UN/Zr fuel with SiC cladding under large break loss-of-coolant accident 14

Safety assessment of UN/Zr fuel with SiC cladding under larg...

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14th International Nuclear Fuel Cycle Conference, GLOBAL 2019 and Light Water reactor Fuel Performance Conference, TOP FUEL 2019

作者： Qian, Libo Yu, Hongxing Sun, Yufa Deng, Jian Wu, Dan Ding, Shuhua Chen, Wei Li, Zhongchun Chen, Xi Liu, Lili Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan610213 China

Accident Tolerant Fuel (ATF), which is aiming at upgrading safety characteristics of nuclear fuel and cladding under design basis and design extension conditions, has drawn more and more attention since Fukushima accident. By virtue of improved basic properties and oxidation resistance comparing with conventional UO2-Zr, UN(Particle)/Zr(Matrix) fuel pin and SiC cladding (UN/Zr-SiC) is expected to slow down accident progression and to provide wider margin of coping time. In present paper, the improved performance of UN/Zr-SiC fuel system on the Large Break Loss-Of-Coolant-Accident (LB LOCA) is analyzed by Appendix K version of ARSAC code (ARSAC-K). For this reason, the corresponding models in ARSAC-K are modified to achieve the goal: 1) thermal physical properties of SiC;2) equivalent thermal physical properties of UN/Zr composite fuel;3) passive oxidation model of SiC under pure steam condition based on modified Deal-Grove model together with linear volatilization model of SiO2 based on heat/mass transfer analogy. Obtained quantitative results show promising safety enhancement in terms of peak cladding temperature (PCT): the PCT of UN/Zr-SiC fuel is much lower than that of UO2-Zr fuel. Then due to the great safety margin of UN/Zr-SiC fuel under LB LOCA condition, an exploratory investigation of the reduction of safety injection capacity and the increase of reactor nominal power under LB LOCA condition is presented. The results show that from the LB LOCA point of view, UN/Zr-SiC fuel has the potential can to be utilized to reduce safety injection capacity or increase reactor nominal power without reducing the safety margin. Therefore, UN/Zr-SiC fuel is demonstrated to have positive effects on safety and capability of reactor design optimization. Copyright © GLOBAL 2019 - International Nuclear Fuel Cycle Conference and TOP FUEL 2019 - Light Water reactor Fuel Performance *** rights reserved.

关键词： Silicon carbide

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design Method of Human-Computer Interactive Interface of MTS Based on DCS of Nuclear Power Plant 5th

Design Method of Human-Computer Interactive Interface of MTS...

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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： Dang, Li-Jun Huang, Jun Ye, Qi Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan610213 China

ISBN: (纸本)9789811634550

MTS (maintenance and test software), as an important human-computer interactive tool in DCS of nuclear power plant, plays a crucial role in configuration and management of the engineering applied data, engineering design, system debugging and operational maintenance. With the advent of information age, industrial designers pay more and more attention to interactive design, and user attaches increasing importance to the human-machine interactive experience of products, which puts forward new requirements for the human-machine interactive interface of MTS. This paper takes the human-computer interaction visual design of MTS as the core, through analyzing the human-computer interaction model and requirements of MTS, formulates the overall design scheme of the human-computer interaction system of MTS. According to the overall scheme, a set of human-computer interaction visual design method applied to MTS of DCS in nuclear power plant is proposed. The method and criterion of human-computer interaction design proposed in this paper is very important for the design human-computer interaction of nuclear power plant application software, and also points out the direction of human-computer interaction optimization of MTS mentioned in this paper. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Nuclear power plants

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INVESTIGATION ON THE SIMULATION OF TURBULENT HEAT TRANSFER OF LIQUID METAL FLOW IN A NARROW RECTANGULAR CHANNEL 29

INVESTIGATION ON THE SIMULATION OF TURBULENT HEAT TRANSFER O...

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2022 29th International Conference on Nuclear Engineering, ICONE 2022

作者： Zhang, Xue Yu, Hongxing Deng, Jian Du, Sijia Zhang, Xilin Zou, Ziqiang Feng, Wenpei Zhang, Yaoxiang Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu China Hefei China

ISBN: (纸本)9780791886434

Liquid metal has the advantages of high boiling point and strong thermal conductivity and is selected as the coolant for a new generation nuclear system. In addition, the narrow rectangular channel is used in the small reactors or research reactors due to its compact structure and high heat transfer capacity. In order to accurately simulate the turbulent heat transfer of liquid metals in narrow rectangular channels, based on the relevant experimental data, this paper explored suitable numerical simulation methods. First of all, according to the research object, the appropriate experimental data was selected, and the geometric modeling, mesh division, and the mesh independence verification were carried out. It was ensured that the y+ meets the requirements of each turbulence model and wall treatment model. Several typical turbulence models and the wall treatment models were evaluated. For the low Prandtl number fluid such as liquid metal, it is necessary to select a suitable turbulent Prandtl number model in the RANS simulation. The sensitivity of the calculation results to the turbulent Prandtl number was analyzed. Finally, the existing turbulent Prandtl number models were evaluated. The suitable at different Pe was given based on experimental value, so that the turbulent heat transfer of liquid metal in a narrow rectangular channel can be accurately simulated. Copyright © 2022 by ASME.

关键词： Liquid metals

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Connectors based on 2-way SMA actuator for self-reconfigurable chain robots 15

Connectors based on 2-way SMA actuator for self-reconfigurab...

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15th IEEE International Conference on Mechatronics and Automation, ICMA 2018

作者： Ni, Fenglei Li, Yongqiang Zhou, Yunhu Liu, Hong Tang, Yuan State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin Heilongjiang Province China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

ISBN: (纸本)9781538660720

Self-reconfigurable modular robots have shown great potential in carrying out multiple tasks in different conditions. A connection of both flexibility and reliability is critical for realizing the docking and transformation of the modular robots. We propose a new design of connectors based on SMA which has the advantages of high autonomy, small size and high speed. The couples of connectors consist of active and passive connector. In the active connector, a two-way rotary SMA actuator is used as the actuation mechanism. The double-layer cam and claws are used as an executive mechanism. The passive connector can be securely docked in five different facets for 3D reconfigurations. The multisensory system and hardware architecture provide the foundation for control strategies. The design and the prototype of the connector are described in this paper. Finally, experimental results to evaluate the performance of docking are presented. © 2018 IEEE.

关键词： Modular robots

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Simulation analysis on the pressurizer degassing sub-system of module small reactor (ACP100)

Simulation analysis on the pressurizer degassing sub-system ...

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2020 International Conference on Nuclear Engineering, ICONE 2020, collocated with the ASME 2020 Power Conference

作者： Zhiyun, Cai Yun, Ren Jianyong, Lai Yulong, Zhang Hang, Liu Xianghong, Liu Minghao, Liu Zhu, Ye Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Sichuan Chengdu610041 China

ISBN: (纸本)9780791883778

A pressurizer degassing sub-system is designed in Module Small reactor(ACP100), which can be used to vent the noncondensable gas dissolved in reactor Coolant during plant shutdown period by opening the remote degassing valve installed on top of the pressurizer. In order to verify the transient characteristic during the whole degassing process, a dedicated transient degassing program is developed based on the improved non-equilibrium multi-region model and the transient degassing model, which is used then to carry out a simulation analysis on this process. Also, the boundary condition models including pressurizer heater power model, pressure spray model, surge line flow model and critical flow model for degassing valve are established. The simulation results show that, under ultimate condition of hot-zero power operation, during the whole degassing process, the Pressurizer's pressure drops to a maximum 0.038MPa, and the water level is raised 0.0637m above the normal level, which means, both of the pressure and water level are within the normal operation band and shall not initiate any safety signal. Meanwhile, the whole transient process lasts about 16 minutes, and then it enters into the stable degassing period. The gas concentration vs time curve is very smooth. It takes about 5.8 hours to remove the gas dissolved in reactor Coolant from 35 ml(STP)/kg to 15 ml(STP)/kg. The analysis shows the Pressurizer Degassing Sub-system is safety, effectively and reliable. Copyright © 2020 ASME

关键词： Plant shutdowns

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Optimization design for the configuration parameters of helical-coil steam generator volume

Optimization design for the configuration parameters of heli...

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2020 International Conference on Nuclear Engineering, ICONE 2020, collocated with the ASME 2020 Power Conference

作者： Fang, Hongyu Wang, Li Zhu, Dahuan Cai, Rong Jiang, Xiaowei Zhang, Dan Qian, Libo Wu, Dan Science and Technology on Reactor System Design Technology Laboratory Chengdu China Sun YAT-SEN University Guangzhou China

ISBN: (纸本)9780791883785

With the development of the nuclear energy industry, small modular reactors (SMRs) have become an important option in China's energy development due to their advantages in terms of safety and economics. The helical-coil steam generator is an important part of SMR, and the structure parameters need to be optimized urgently to reduce costs and improve safety. In this paper, various thermohydraulic parameters were used as indicators for the design quality of the helical-coil steam generator, such as the volume of the equipment, velocity of the flow, maximum temperature of the tubes, and natural circulation capability. The optimization of these target parameters has important theoretical and practical values. The genetic algorithm method is widely used to processes data efficiently, and it is able to reach a optimum design rapidly, which makes it a good choice for the optimization of parameters. The results show that this method could efficiently reduce the volume of the helical coil steam generator. © 2020 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Genetic algorithms

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Study on the Influence of reactor system LOCA Modeling Mode on Dynamic Analysis 23rd

Study on the Influence of Reactor System LOCA Modeling Mode ...

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23rd Pacific Basin Nuclear Conference, PBNC 2022

作者： Shuai, Liu Xuan, Huang Zhipeng, Feng Zhongxiu, Zeng Huanhuan, Qi Xiaozhou, Jiang Harbin Engineering University Harbin China Science and Technology on Reactor System Design Technology Laboratory Sichuan Chengdu China

ISBN: (纸本)9789811987793

The reactor system has a large scale of components. And the system dynamic analysis model for loss of coolant accidents (LOCA) contains many non-linear factors. The transient calculation analysis takes a long time and the convergence is difficult to guarantee. In this paper, two different analysis models (complete three-loop model and single-loop model) of the first loop system of reactor are established for comparative analysis. The analysis shows that the calculation error of the main position load in the two different model is within 10%. The decoupling influence of the wave tube and the reactor inlet and outlet on the system dynamic characteristics is within an acceptable range. When the single loop model is used, it is necessary to decouple the reactor pressure vessel and pressurizer. And the simplified boundary is adapted to simulate its effect on the whole loop. The single-loop dynamic analysis model based on the decoupling criterion can greatly reduce the calculation scale and meet the calculation accuracy, which can be used to calculate the LOCA dynamic characteristics of the reactor system quickly. The model can also be used for seismic analysis of reactor system. And using this model for reactor system dynamic analysis can greatly improve the calculation efficiency. Please copy you summary here. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Loss of coolant accidents

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Study of control rod device mechanism missile impact on protection plate

Study of control rod device mechanism missile impact on prot...

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2017 Transactions of the American Nuclear Society, ANS 2017

作者： Ye, Xianhui Xiong, Furui Zhen, Bin Jiang, Naibin Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan610041 China

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