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2019 Transactions of the American Nuclear Society, ANS 2019

作者： Zeng, Qingna Wang, Donghui Zang, Fenggang Zhang, Yixiong Science and Technology on Reactor system Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

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Improvement and optimization of naspic SVDU engineering design in nuclear power plant according to NUREG0700 27

Improvement and optimization of naspic SVDU engineering desi...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Li, Yutong Xie, Weibo Ma, Quan Zhang, Yu Zhao, Yang Hu, Qingren Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan China

ISBN: (纸本)9784888983051

Safety Video Display Unit (SVDU) provides the interface between operator and reactor protection system (RPS).SVDU not only displays the signals and parameters which related to safety function but also support the operator to send control commands to *** a safety classified equipment and part of human machine interface (HMI), engineering design of SVDU should be addressed in plant safety with regarding to the HMI related standards. NUREG0700 is the guideline of human-system interface design, using which as a tool, a lot of improvement has been made to optimize the design of NASPIC SVDU: Display view arrangement, PAMS parameter curves, alarming etc. were improved and optimized. Then conformity analysis of NASPIC SVDU regarding NUREG0700 has been made, and equipment qualification was conducted. Finally NASPIC SVDU was prone to be in conformity with NUREG0700 and was able to achieve effective human-computer interaction. Copyright © 2018-2019 by JSME

关键词： Nuclear fuels

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The sensitivity analysis of the core lower head molten pool model based on variance decomposition 27

The sensitivity analysis of the core lower head molten pool ...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Li, Zhigang Liu, Wei Ming, Pingzhou Pan, Junjie An, Ping Liu, Dong Lu, Wei Yu, Hongxing Nuclear Power Institute of China Science and Technology on Reactor System Design Technology Laboratory ChengDu610041 China

ISBN: (纸本)9784888983051

The lower head molten pool model is an important model for the In Vessel Retention (IVR) effectiveness evaluation. It has the characteristics of complex relationship, many input parameters and large uncertainty. The traditional local sensitivity analysis method has the disadvantages of large amount of calculation and low efficiency when performing sensitivity analysis of complex models. Based on variance decomposition of the global sensitivity analysis method, the sensitivity analysis library(SALib) and IVR analysis code(CISER) developed by Nuclear Power Institute of china(NPIC) are adopt to analyze the sensitivity of the input parameters for four key parameters, such as the lower head wall heat flux ratio. In the paper, the sensitivity coefficient and influence tread of input parameters on key results are obtained, which provides a reference for the optimization of the lower head molten pool model and severe accident mitigation strategies. Copyright © 2018-2019 by JSME

关键词： Sensitivity analysis

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Channel Modeling and Multi-User Precoding for Tri-Polarized Holographic MIMO Communications

arXiv

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arXiv 2023年

作者： Wei, Li Huang, Chongwen Alexandropoulos, George C. Yang, Zhaohui Yang, Jun Sha, Wei E.I. Debbah, Mérouane Yuen, Chau Singapore University of Technology and Design Singapore College of Information Science and Electronic Engineering Zhejiang University China Department of Informatics and Telecommunications National and Kapodistrian University of Athens Greece Technology Innovation Institute Abu Dhabi United Arab Emirates State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen China Wireless Product R&D Institute ZTE Corporation Shenzhen China CentraleSupelec University Paris-Saclay Gif-sur-Yvette France

This paper studies the exploitation of triple polarization (TP) for multi-user (MU) holographic multiple-input multiple-output surface (HMIMOS) wireless communication systems, aiming at capacity boosting without enlarging the antenna array size. We specifically consider that both the transmitter and receiver are equipped with an HMIMOS comprising compact sub-wavelength TP patch antennas. To characterize TP MU-HMIMOS systems, a TP near-field channel model is proposed using the dyadic Green's function, whose characteristics are leveraged to design a user-cluster-based precoding scheme for mitigating the cross-polarization and inter-user interference contributions. A theoretical correlation analysis for HMIMOS with infinitely small patch antennas is also presented. According to the proposed scheme, the users are assigned to one of the three polarizations, which is easy to implement, at the cost, however, of reducing the system's diversity. Our numerical results showcase that the cross-polarization channel components have a non-negligible impact on the system performance, which is efficiently eliminated with the proposed MU precoding scheme. Copyright © 2023, The Authors. All rights reserved.

关键词： Polarization

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Severe accident mitigation measure and severe accident sequence of SMR 27

Severe accident mitigation measure and severe accident seque...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Yin, Shasha Yan, Sun Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan China

ISBN: (纸本)9784888983051

Interest in evaluation of reactor response and off-site consequences following beyond design basis accidents has significantly increased after Fukushima. MELCOR is an advanced computational aid that has been widely used and adapted to various reactor designs for severe core damage analyses. This paper summarizes the core thermal hydraulic response for a hypothetical severe accident caused by station blackout at a small modular reactor using MELCOR. The results show that: After a severe accident in SMRs, the passive core cooling system can cool the core by the natural circulation of water, extend the time of core uncover. The time of bottom head failed delays nearly 64000s. So the passive core cooling system have great mitigation effect on the severe accident induced by station blackout. The analyses are focused on safety assessment of the reactor core for severe accidents and are part of the overall evaluation of safety features of the small modular reactor for residual risk posed by severe accidents. Copyright © 2018-2019 by JSME

关键词： Thermoelectric equipment

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Research on boundary disposal of pipes decoupling based on PEPs 27

Research on boundary disposal of pipes decoupling based on P...

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27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019

作者： Yanli, Yuan Feng, Yuan Xinjun, Wang Xiaoming, Bai Rui, Zhang Liangang, Zheng Xifeng, Lu Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan China

ISBN: (纸本)9784888983051

Generally, one of the remarkable characteristics is: compared with the main pipe, the sizes of the auxiliary piping are smaller, which makes the auxiliary piping satisfy the criteria to be decoupled from the main piping. So when the auxiliary pipes connected to the main piping are analyzed, there are two methods: one is that the auxiliary pipe is analyzed connected to the main piping, and the other is that the auxiliary pipe is analyzed not to be connected to the main pipe. Because the response spectrum at the location of the connection of the auxiliary pipes and the main piping is lacked, the previous choice is usually adopted. At present, the main software used for analyzing the stress of the pipes in nuclear power station is PEPS, but when the PEPS is adopted to analyze the small pipes, if the small pipes are analyzed connected to the main pipe, the boundaries of the thermal analysis and those of the seismic analysis are different, so the two kinds of analysis cannot be carried out at the only one model. That is, when the small pipe is analyzed connected to the main piping, two models are needed for thermal analysis and the seismic analysis, and then the results of the thermal analysis and the seismic analysis are distilled separately, and the results are combined according to determinate mode, and then the combined results are evaluated according to the criterion. Consequently, not only is the model complex, but also the combination of the seismic stress and the thermal stress is not convenient in the previous method. In the latter method, the auxiliary pipe is not connected to the main piping, accordingly, not only is the modal simple, but also the combination of the seismic stress and the thermal stress is convenient. The only problem which is needed to be solved is the seismic response spectrum and the displacements, and an approach to solve the problem is presented in the article. A response spectrum calculation method is obtained based on the single oscilla

关键词： Thermoanalysis

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A calibration method for raman distributed temperature sensor in nuclear power plant

A calibration method for raman distributed temperature senso...

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2019 Transactions of the American Nuclear Society, ANS 2019

作者： Xiang, Meiqiong Liu, Yanyang Qing, Xianguo Zhu, Jialiang Wu, Qian Zhu, Biwei Xu, Sijie Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China

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Model Predictive Control for Steering system of Water-Jet Propulsion

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Journal of Shanghai Jiaotong university(science) 2020年第3期25卷 299-303页

作者： GONG Zhenghua SONG Chenwei LI Gangqiang CHEN Jianping XU Zijing YUAN Jingqi MOE Key Laboratory of Marine Intelligent Equipment and System Shanghai Jiao Tong UniversityShanghai 200240China Laboratory of Science and Technology on Waterjet Propulsion Shanghai 200011China Marine Design&Research Institute of China Shanghai 200011China Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China

Water-jet propulsion is a widely applied ship propulsion *** steering control system has an important impact on manoeuvre *** this paper,transfer function model is firstly established on the basis of mechanism analysis of water-jet steering ***,by considering the variability of model parameters and input constraints in practical operation,a model predictive controller is designed for steering system ***,model based disturbance observer is employed in an attempt to reject environmental *** performance of the proposed model predictive control (MPC) scheme for a particular steering system is compared with that of conventional proportional integral derivative (PID) control *** results demonstrate that the proposed model predictive controller outperforms conventional PID controller,particularly in robustness,response delay and tracking accuracy.

关键词： water-jet propulsion steering system model predictive control(MPC) disturbance observer

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Long-distance OPGW Optical Cable Monitoring system Based on φ-OTDR technology

Long-distance OPGW Optical Cable Monitoring System Based on ...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Ying Wang Yanyang Lei Xing Liu Can Li Xiaomeng Xia Tong Chen Yue Deng Jing Zhang Xiaohui Tang Information Communication Dispatching Monitoring Center State Grid Information & Telecommunication Branch Beijing China National Key Laboratory of Science and Technology on Tunable Laser Harbin Institute of Technology Harbin China Energy Planning Institute Southwest Electric Power Design Institute Co. Ltd Chengdu China

In this paper, a long-range phase-sensitive optical time-domain reflectometer (φ-OTDR) system is proposed, which is based on the direct detection type φ-OTDR system, combined with the first-order forward Raman distributed amplification technology and remote pump amplification technology, to achieve 130km vibration monitoring range and 20m spatial resolution. Compared with relay EDFA amplification technology and bidirectional distributed amplification technology, the system eliminates the necessity of a remote power supply, which is of great significance in the monitoring application of long-distance OPGW optical cable.

关键词： Vibrations Stimulated emission Power supplies Optical pumping Communication cables Optical sensors Optical reflection

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Task oriented adaptive HUD human reliability analysis

Task oriented adaptive HUD human reliability analysis

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IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Liu Sichen Zhou Lei Liu Liwen Majian Key Laboratory of Avionics System Integrated Technology China Aviation Radio Electronics Research Institute Shanghai China College of Communication and Art Design University of Shanghai for Science and Technology Shanghai China School of Mechanical Engineering Southeast University Jiangning District Nanjing China Ministry of Education Engineering Research Center of New Light Sources Technology and Equipment Southeast University Jiangning District Nanjing China

In this paper, the human factors reliability of standard HUD and adaptive HUD is evaluated by comprehensively using behavioral indicators and physiological indicators. A 3-factor multi-level hybrid experiment (HUD mode mission environment repetition times) was used to explore the load difference and performance difference between adaptive HUD and traditional HUD in different flight stages and different flight duration during flight. The results show that compared with the traditional HUD, the adaptive HUD system can significantly reduce the mental load of pilots in the takeoff and approach landing phases, and in the case of long-term flight, the adaptive HUD system will not cause additional burden to the subjects. keywords: HUD, human reliability, ET, ECG, EEG

关键词： Adaptive systems Smart cities Human factors Electrocardiography Physiology Electroencephalography Behavioral sciences

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