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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...

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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Magnetic suppression for a possible Fe-poor organic-inorganic hybrid superconductor Fe14Se16(tepa)0.8(tepa=tetraethylenepentamine)with a superconducting transition at∼42 K

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Journal of Materials science & technology 2024年第31期198卷 98-110页

作者： Da Li Qifeng Kuang Xiaoling Men Bo Zhang Jianqi Huang Xiaolei Shang Bing Yang Teng Yang Zhiwei Li Zhidong Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Key Lab for Magnetism and Magnetic Materials of the Ministry of Education Key Lab for Special Functional Materials and Structure Design of the Ministry of EducationLanzhou UniversityLanzhou 730000China

Composition/structure-dependent superconductivity for FeSe-based superconductors attracted great attention not only due to their high superconducting transition temperatures(TC),but also for understanding the origin of iron-based ***,we report a new Fe-poor organic-inorganic hybrid material Fe_(14)Se_(16)(tepa)0.8 with a paramagnetic-diamagnetic transition at∼42 K grown by a high-temperature organic-solution-phase method with soluble iron/selenium sources in a tepa solution,alternative to previous intercalation *** Fe_(14)Se_(16)(tepa)0.8 phase is in a tetragonal layered hybrid structure with a nanoplate *** analyses reveal a Fe-poor characteristic of the hybrid in contrast to previous FeSe-intercalated superconductor,and selected area electron diffraction pattern is featured by Fe_(3)Se_(4) superstructures with a√2×√2 of Fe vacancy *** initio density functional calculations show that minus Fe_(3)Se_(4) ions are stable in the hybrid and∼0.25e-/Fe_(0.75)Se is obviously larger than the reported values of approximately 0.2e-/FeSe in other FeSe-intercalated *** hysteresis loops and temperature dependence of dc/ac susceptibilities of the Fe_(14)Se_(16)(tepa)0.8 measured below∼42 K suggest a presence of the Meissner effect in this *** of synthesis conditions on structures and magnetic properties of the hybrids show a magnetic evolution from a long-range ferrimagnetic(FIM)order of Fe_(14)Se_(16)(tepa)to a coexistence of FIM and superconducting(SC)orders of Fe_(14)Se_(16)(tepa)0.9 and an SC order of Fe_(14)Se_(16)(tepa)0.8.X-ray absorption spectrum(XAS)confirms the presence of ferric/ferrous irons.Mössbauer studies reveal that the high-TC superconductivity originates from a suppression of the FIM order through tuning the spin states of irons from high-spin Fe^(3+)(S=5/2)and Fe^(2+)(S=2)in the Fe_(14)Se_(16)(tepa)to low-spin Fe^(3+)(S=1/2)and Fe^(2+)(S=0)in the Fe_(14)Se_(16)(tepa)***

关键词： Iron-based hybrid superconductor Superconductivity Superconducting transition Magnetic properties Solution synthesis

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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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A Monte Carlo Code Developed for Radiation Shielding Calculations Based on RMC 23rd

A Monte Carlo Code Developed for Radiation Shielding Calcula...

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23rd Pacific Basin Nuclear Conference, PBNC 2022

作者： Ying, Dongchuan Lyu, Huanwen Tang, Songqian Shang, Xiaotong Xiao, Feng National Key Laboratory of Reactor System Design Technology Nuclear Power Institute of China Chengdu610041 China Department of Engineering Physics Tsinghua University Beijing100084 China

ISBN: (纸本)9789811988981

In this paper, a new developed Monte Carlo method code, intended to be used in shielding calculations, will be introduced. This code was developed on the basis of RMC and under the collaboration of the Nuclear Power Institute of China and Tsinghua University. To meet the requirement of shielding calculations, many features or functions have been realized, such as the flexible fixed source definition and calculation, the gamma transport function, variance reduction function and various tally functions, etc. Those functions have enabled the new version of RMC to have the radiation shielding capability. The validation and application of radiation shielding calculation capability have been carried out. The results of a nuclear power plant pressurized water reactor model will be presented and good agreements have been achieved, which proves the capability of the RMC in the shielding calculations. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Pressurized water reactors

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Structural basis for histone H3 recognition by NASP in Arabidopsis

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Journal of Integrative Plant Biology 2022年第12期64卷 2309-2313页

作者： Yanhong Liu Liu Chen Na Wang Baixing Wu Hongyu Bao Hongda Huang Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes Department of BiologySchool of Life SciencesSouthern University of Science and TechnologyShenzhen 518055China School of Life Science and Technology Harbin Institute of TechnologyHarbin 150080China

The structural basis for histone recognition by the histone chaperone nuclear autoantigenic sperm protein(NASP)remains largely ***,we showed that Arabidopsis thaliana AtNASP is a monomer and displays robust nucleosome assembly activity in *** the structure of AtNASP complexed with a histone H3α3 peptide revealed a binding mode that is conserved in human *** recognizes the H3 N-terminal region distinct from human ***,AtNASP forms a co-chaperone complex with ANTI-SILENCING FUNCTION 1 ASF1 by binding to the H3 Nterminal ***,we deciphered the structure of AtNASP and the basis of the AtNASP-H3 interaction.

关键词： Arabidopsis NASP ASF1 crystal structure epigenetics histone chaperone histone H3

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Effectiveness Evaluation Study of Self-made Zinc Alloy Sacrificial Anode under Chloride Salt Erosion Environment

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Journal of Wuhan University of technology(Materials science) 2023年第1期38卷 222-230页

作者：南雪丽 JI Jianrui LI Rongyang CHEN Hao WANG Yi TANG Weibin School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China Gansu Province Transportation Planning Survey&Design Institute Co.Ltd.Lanzhou 730000China

To investigate the effectiveness of self-made zinc alloy sacrificial anode material for the protection of reinforcement in concrete under chlorine salt erosion environment,salt solution immersion corrosion and electromigration accelerated corrosion tests were used to evaluate the effectiveness of self-made zinc alloy anode with the help of relevant cathodic protection guidelines and evaluation criteria for the corrosion of reinforcement in *** results showed that the protection was effective because the potential of the zinc alloy anode protection steel bar in the salt solution satis?ed the“-780 mV(SCE)”validity *** self-corrosion potential(E_(corr))of the sacri?cial anode protection steel in concrete was greater than-276 mV,and the protective current density of the zinc alloy anode was 1-3μA·cm^(-2),which met the standards of EN12696-2000,further indicating that the self-made zinc alloy sacri?cial anode had a good protection combining with the polarization resistance and the appearance of the corroded surface of the steel in *** microscopic morphology of the corroded surface and the composition of the corrosion products indicates that the mortar of the self-made zinc alloy anode has a lower pH than the imported anodes,so the long-term protection of the selfmade zinc alloy sacri?cial anode needs to be further improved.

关键词： zinc alloy anode cathodic protection steel corrosion concrete polarization curve

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Observation of electron–phonon coupling and linear dichroism in PL spectra of ultra-small CsPbBr_(3) nanoparticle solution

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escience 2023年第6期3卷 51-57页

作者： Chengqiang Wang Tao Song Pingyuan Yan Shu Hu Chenhong Xiang Zihan Wu Heng Li Haibin Zhao Lili Han Chuanxiang Sheng State Key Laboratory of Photovoltaic Science and Technology Department of Optical Science and EngineeringSchool of Information Science and TechnologyFudan UniversityShanghai 200433China College of Chemistry and Chemical Engineering Key Laboratory of Special Function Materials and Structure DesignMinistry of EducationLanzhou UniversityLanzhou 730000China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Blue-emission(~480 nm)CsPbBr_(3) nanoparticles with ultra-small size(~2.1 nm)are synthesized using the liquid nitrogen freezing with the ligand of dodecylbenzene sulfonic acid(DBSA).Asymmetric narrow emissions at the low energy side,with the full width at half-maximum of~20 nm,are observed in solution and film at room *** spectral asymmetry is mainly ascribed to phonon vibronic replica with averaged phonon energy of~40 ***,exciting this CsPbBr_(3) nanoparticles solution using linearly polarized 6 ns pulsed laser at 355 nm,we observe polarized emission with polarization degree(P_(PL))of~7%,and P_(PL) decreases more than 20%in the vibronic ***,the P_(PL) goes to zero in frozen solutions as well as in *** we speculate the polarized emission is due to the photoinduced re-alignment of nanoparticles,and the diminished P_(PL) at the phonon side band may be due to the non-adiabatic electronic-to-vibronic *** novel phenomena from the ultra-small CsPbBr_(3) nanoparticle demonstrated in this work may provide fundamental insights into its photophysics with direct implications for optoelectronics.

关键词： CsPbBr_(3) Phonon vibronic replicas Polarized Ultra-small Electron–phonon coupling

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An Adaptive Filter Method Based on Dual Sensors for Spatial Magnetic Noise Suppression

An Adaptive Filter Method Based on Dual Sensors for Spatial ...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Yang, Peng Huang, Chen Hua, ChengChao Yang, Chunyu Du, Yuxin Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design Centre Wuhan China China Ship Development and Design Centre Wuhan China

ISBN: (纸本)9781733509657

An adaptive filter method based on dual sensors for spatial magnetic noise suppression is proposed. Based on normalized-least-mean-square(NLMS) algorithm, an adaptive filter model of spatial magnetic noise is established. The results show that the magnetic noise is suppressed while the SNR in frequency domain of the weak low frequency target magnetic signal is improved. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Adaptive filters

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High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins

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Journal of Materials science & technology 2022年第11期106卷 162-172页

作者： Miao Wang Xingwei Huang Peng Xue Shangquan Wu Chuanyong Cui Qingchuan Zhang CAS Key Laboratory of Mechanical Behavior and Design of Materials University of Science and Technology of ChinaHefei 230027China Superalloy Division Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230027China

The trade-off between strength and ductility has been an enormous difficulty in the field of materials for an extended time due to their inverse correlation. In this work, friction stir processing(FSP) was for the first time performed to high-strength and high-melting-point Ni-Co based superalloy(GH4068),and enhanced strength and ductility were achieved in FSP samples. At room temperature, the FSP sample demonstrated significantly higher yield strength and ultimate tensile strength(1290 and 1670 MPa)than that of the base material(BM, 758 and 904 MPa) and advanced wrought GH4068 alloy(982 and 1291 MPa), concurrent with high tensile ductility(~24%). Compared with the BM, 70% higher yield strength of the FSP sample results from the remarkable contribution of grain-boundary and nanotwin strengthening, which has been confirmed by the multimechanistic model studied in this work. More importantly, with increasing temperature, an excellent strength-ductility synergy was obtained at 400 ℃,i.e., the yield strength of the FSP sample was increased by more than 50% compared with the BM(from789 to 1219 MPa);more interestingly, the elongation was also significantly increased from 17.9% in the BM to 28.5% in the FSP sample. Meanwhile, the Portevin-Le Chatelier effect was observed in the engineering stress-strain curve. The occurrence of this effect may be attributed to the interaction between solutes and defects like twins and mobile dislocations. Moreover, the grain refinement mechanism of FSP samples was proved to be discontinuous dynamic recrystallization.

关键词： Superalloy Friction stir processing Grain refinement Nanotwins

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