非对称条件下双环路自然循环稳定性分析
作者：
朱恩平;王婷;刘紫静;赵鹏程;王天石
期刊：
核动力工程 ,2022年43(2):59-64 ISSN：0258-0926
通讯作者：
Liu, Zijing(liuzijing1123@163.com)
作者机构：
[朱恩平; 王婷; 刘紫静; 赵鹏程; 王天石] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[朱恩平; 王婷; 刘紫静; 赵鹏程; 王天石] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
自然循环;雅克比(Jacobi)矩阵;非对称;双环路;稳定性边界
摘要：
为研究非对称条件下双环路自然循环稳定性的变化，以单环路自然循环载热系统为起点，采用无量纲分析方法，将单环路自然循环的无量纲控制方程组中关于位移项进行傅里叶展开，从而得到表征单环路自然循环载热系统的雅克比（Jacobi）矩阵，并进行验证。在此基础上，构建了双环路Jacobi矩阵分析模型，基于所构建的模型，分别开展不同负荷差和阻力差下双环路自然循环稳定性分析，以及回路几何特征对稳定性边界的影响。结果表明，对于某一双环路系统而言，存在2个临界雷诺数，当左、右环路引入负荷差大于这2个临界雷诺数时，系统将会变得不稳定。增大高径比、减少管道直径、增加加热段长度和减少冷却段长度可以增加回路稳定性区域范围，且反应堆回路稳定性边界对环路高径比、加热段长度较为敏感；此外，在自然循环回路形成的允许范围内，增加环路压降可以提高系统稳定性。
语种：
中文
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A Model Predictive Controller for the Core Power Control System of a Lead-Cooled Fast Reactor
作者：
Hu, Yang;Liang, Lehua;Chen, Lekang;Zeng, Wenjie
期刊：
Frontiers in Energy Research ,2022年10:893528 ISSN：2296-598X
通讯作者：
Zeng, Wenjie(zengwenjie0218@163.com)
作者机构：
[Liang, Lehua; Zeng, Wenjie; Hu, Yang; Chen, Lekang] Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China.
通讯机构：
[Zeng, W.] S;School of Nuclear Science and Technology, China
关键词：
core power control system;lead-cooled fast reactor;model predictive control;stability;state space model
摘要：
To study the model predictive control (MPC) for a lead-cooled fast reactor's core power control system (LFR), firstly, the LFR core is established with the state space model. Then, to establish an LFR core power control system, a predictive model controller is used. Finally, the conditions of 20pcm step reactivity and 5% step down of coolant inlet temperature are introduced to study the control characteristic. The maximum overshot (MO) and the transient time are calculated in the time domain, and the stability of the core power control system is analyzed using the Nyquist and Bode diagrams in frequency domains. The result shows that the MPC controller and PID controller are feasible in core power control, and the core power control systems are closed-loop stable systems. Copyright © 2022 Hu, Liang, Chen and Zeng.
语种：
英文
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The effects of defects on the defect formation energy, electronic band structure, and electron mobility in 4H-SiC
作者：
Jiang, Shangting;Li, Ye;Chen, Zhiyong;Zhu, Weihua;Wu, Qinmao;...
期刊：
AIP Advances ,2022年12(6):065311 ISSN：2158-3226
通讯作者：
Wang, Xinlin(wxl_ly000@aliyun.com)
作者机构：
[Jiang, Shangting; Li, Ye; Wang, Xinlin] School of Nuclear Science and Technology, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang;421001, China;[Chen, Zhiyong; Zhu, Weihua; Wu, Qinmao; He, Hongyu] Hunan Province Key Laboratory for Ultra-Fast Micro/Nano Technology and Advanced Laser Manufacture, School of Electrical Engineering, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang;[Jiang, Shangting; Li, Ye; Chen, Zhiyong; Zhu, Weihua; Wu, Qinmao; He, Hongyu; Wang, Xinlin] 421001, China;[Wang, Xinlin] 421001, China<&wdkj&>Hunan Province Key Laboratory for Ultra-Fast Micro/Nano Technology and Advanced Laser Manufacture, School of Electrical Engineering, University of South China, No. 28, Changsheng West Road, Hunan, Hengyang
通讯机构：
[Ye Li; Xinlin Wang] S;School of Nuclear Science and Technology, University of South China , No. 28, Changsheng West Road, Hengyang City, Hunan 421001, China
摘要：
With the first-principle method, we studied the effects of the type and position of defects on the defect formation energy, electronic band structure, and electron mobility of the 4-layer hexagonal system silicon carbon (4H-SiC). The vacancy defect formation energy is smaller than the interstitial defect formation energy. The C vacancy defect formation energy is the smallest, while the Si interstitial defect formation energy is the largest. The defect formation energy is little affected by the defect position. The electronic band structure shows semi-metallic property due to the vacancy defect and the interstitial defect, and it shows a smaller bandgap due to the antisite defect. The electronic band structure changes little while the defect position changes. The electron mobility is reduced in varying degrees according to different defect types. The electron mobility changes little while the defect position changes. © 2022 Author(s).
语种：
英文
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Calculation and discussion of the distribution of double magnetic ions in the lattice site: The perovskite structure with d3 -d5 superexchange interaction
作者：
Mo, Jiajun;Liu, Min;Xu, Shiyu;Xia, Puyue;Zhang, Qinghang;...
期刊：
Ceramics International ,2022年48(21):31309-31314 ISSN：0272-8842
通讯作者：
Xia, Yanfang(xiayfusc@126.com)
作者机构：
[Xu, Shiyu; Shen, Jiyu; Zhang, Qinghang; Liu, Min; Mo, Jiajun; Xia, Puyue; Xia, Yanfang] Univ South China, Coll Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Yanfang Xia] C;College of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
关键词：
B-site disorder distribution;Molecular field theory;Double perovskite;Phase transition temperature
摘要：
In this paper, for the d3-d5 superexchange perovskite system, the distribution of double magnetic ions in the B-site is quantitatively calculated using molecular field theory. The model we established, which applies to RFe1−pCrpO3, goes one step further than the former anti-site defect one. Calculations have revealed that the distribution of Fe and Cr ions in many previous studies of Fe–Cr perovskite does not always conform to the uniform distribution. Instead, they exhibit an effect that aviods the Fe–Fe or Cr–Cr clustering. This work settles previous disputes regarding the phase transition temperature range of double perovskites and explains why the phase transition temperature shifts with the same given doping proportion. It furnishes theoretical guidance for the design of functional materials with arbitrary phase transition temperatures. © 2022 Elsevier Ltd and Techna Group S.r.l.
语种：
英文
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Enhanced Antimicrobial, Cytotoxicity, Larvicidal, and Repellence Activities of Brown Algae, Cystoseira crinita-Mediated Green Synthesis of Magnesium Oxide Nanoparticles
作者：
Fouda, Amr;Eid, Ahmed M.;Abdel-Rahman, Mohamed Ali;EL-Belely, Ehab F.;Awad, Mohamed A.;...
期刊：
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY ,2022年10:849921 ISSN：2296-4185
通讯作者：
Fouda, A
作者机构：
[Fouda, Amr; Eid, Ahmed M.; Hassan, Saad El-Din; EL-Belely, Ehab F.; Abdel-Rahman, Mohamed Ali; Fouda, A] Al Azhar Univ, Fac Sci, Bot & Microbiol Dept, Cairo, Egypt.;[Awad, Mohamed A.] Al Azhar Univ, Fac Sci, Dept Zool & Entomol, Cairo, Egypt.;[AL-Faifi, Zarraq E.] Jazan Univ, Ctr Environm Res & Studies, Jazan, Saudi Arabia.;[Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Heng Yang, Peoples R China.;[Hamza, Mohammed F.] Nucl Mat Author, Cairo, Egypt.
通讯机构：
[Fouda, A ] A;Al Azhar Univ, Fac Sci, Bot & Microbiol Dept, Cairo, Egypt.
关键词：
Brown algae;Cystoseira crinita;Green synthesis;MgO-NPs;antimicrobial;In-vitro cytotoxicity;larvicidal;repellence activity
摘要：
Herein, the metabolites secreted by brown algae, Cystoseira crinita, were used as biocatalyst for green synthesis of magnesium oxide nanoparticles (MgO-NPs). The fabricated MgO-NPs were characterized using UV-vis spectroscopy, Fourier transforms infrared spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy linked with energy-dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Data showed successful formation of crystallographic and spherical MgO-NPs with sizes of 3–18nm at a maximum surface plasmon resonance of 320nm. Moreover, EDX analysis confirms the presence of Mg and O in the sample with weight percentages of 54.1% and 20.6%, respectively. Phyco-fabricated MgO-NPs showed promising activities against Gram-positive bacteria, Gram-negative bacteria, and Candida albicans with MIC values ranging between 12.5 and 50μg mL−1. The IC50 value of MgO-NPs against cancer cell lines (Caco-2) was 113.4μg mL−1, whereas it was 141.2μg mL−1 for normal cell lines (Vero cell). Interestingly, the green synthesized MgO-NPs exhibited significant larvicidal and pupicidal activity against Musca domestica. At 10μg mL−1 MgO-NPs, the highest mortality percentages were 99.0%, 95.0%, 92.2%, and 81.0% for I, II, III instars’ larvae, and pupa of M. domestica, respectively, with LC50 values (3.08, 3.49, and 4.46μg mL−1), and LC90 values (7.46, 8.89, and 10.43μg mL−1), respectively. Also, MgO-NPs showed repellence activity for adults of M. domestica at 10μg mL−1 with 63.0%, 77.9%, 84.9%, and 96.8% after 12, 24, 48, and 72h, respectively. Copyright © 2022 Fouda, Eid, Abdel-Rahman, EL-Belely, Awad, Hassan, AL-Faifi and Hamza.
语种：
英文
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Prediction of intermediate and high risk factors based on MRI imaging radiomics before neoadjuvant therapy for cervical cancer
作者：
Zhou, Yimin;Wu, Rongrong;Zuo, Guoping;Bai, Penggang
作者机构：
[Zhou, Yimin; Zuo, Guoping] School of Nuclear Science and Technology, University of South China, China;[Wu, Rongrong] Department of Radiation Oncology, Clinical Oncology School of Fujian Medical University, China;[Bai, Penggang] Department of Radiation Oncology, Fujian Cancer Hospital, China
会议名称：
3rd International Symposium on Artificial Intelligence for Medical Sciences, ISAIMS 2022
会议时间：
October 13, 2022 - October 15, 2022
会议地点：
Amsterdam, Netherlands
摘要：
Objective: A fusion model based on axial LAVA+C sequence images and clinical characteristics on preoperative MRI before neoadjuvant therapy is discussed for identifying intermediate and high risk factors in cervical cancer patients. Methods: In a retrospective analysis of 145 cervical cancer patients treated at Fujian Cancer Hospital between January 2013 and July 2018, cases with more than two intermediate risk factors or more than one high-risk factor were classified as positive based on pathological findings, while cases with fewer than two intermediate risk factors and no high-risk factors were classified as negative based on pathological findings. Using an entirely random process, the cases were split into 116 cases for the training set and 29 cases for the test set, based on the Ax-LAVA+C sequence to extract radiomics features. dimensionality reduction for features LASSO and spearman correlation coefficient are used to select the most advantageous radiomics features. The best radiomics models may be filtered out using seven machine learning techniques. To create a composite radiomics model, combine the imaging radiomics model and the clinical model. And assess the model's effectiveness using the ROC, decision curves, and calibration curves. Results: The AUC of the validation set in the clinical- radiomics model was 0.823, the accuracy was 0.793, the sensitivity was 0.667, and the specificity was 0.972, which were higher than the clinical model and comparable to the radiomics model. Conclusion: Before beginning neoadjuvant therapy, the MRI radiomics model based on the Ax-LAVA+C sequence is effective in identifying intermediate- and high-risk variables for postoperative cervical cancer. © 2022 ACM.
语种：
英文
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Perpendicular heating of ions by low-frequency polarized Alfvén waves
作者：
Lu, Xing-Qiang;Li, Ke-Hua;Yu, Li-Min;Guo, Wei;Gong, Xue-Yu
期刊：
Advances in Space Research ,2022年70(2):556-561 ISSN：0273-1177
通讯作者：
Guo, Wei(guowei@ytu.edu.cn)
作者机构：
[Lu, Xing-Qiang; Guo, Wei] Yantai Univ, Coll Nucl Equipment & Nucl Engn, Yantai 264005, Peoples R China.;[Li, Ke-Hua] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China.;[Yu, Li-Min] East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China.;[Gong, Xue-Yu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Wei Guo] C;College of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China
关键词：
Ions heating;Low-frequency Alfvén wave;Nonresonant heating;Perpendicular heating
摘要：
The expression for the perpendicular saturation temperature of ions heated by a low-frequency shear Alfvén wave due to nonresonant interaction in low-β plasmas has been derived. This expression is closely related to the frequency, polarization, and amplitude of the low-frequency shear Alfvén wave. The derived expression has been verified by performing simulations. Because of the Doppler effect, the saturation temperature is different for different polarized waves. The saturation value of the perpendicular ion temperature has a lower limit for the left-handed polarized Alfvén wave and a higher limit for the right-handed polarized Alfvén wave. The results might be helpful to explain the heating of ions in the solar wind. © 2022 COSPAR
语种：
英文
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基于蚁群算法的小型铅基堆堆芯功率控制研究
作者：
李金阳;刘依诺;曾文杰;胡杨;于涛
期刊：
核动力工程 ,2022年43(3):135-138 ISSN：0258-0926
通讯作者：
Zeng, Wenjie(zengwenjie0218@163.com)
作者机构：
[李金阳; 刘依诺; Zeng, Wenjie; 胡杨; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[李金阳; 刘依诺; Zeng, Wenjie; 胡杨; 于涛] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
小型铅基堆;蚁群算法;堆芯功率控制
摘要：
小型铅基堆适用范围广、运行工况复杂多变,采用传统的控制方法难以实现堆芯功率的良好控制。为解决传统线性二次高斯控制(LQG)/回路传输恢复技术(LTR)控制器参数无法实现在线调整问题,采用微扰理论建立堆芯状态空间模型,设计一种基于蚁群算法的LQG/LTR控制器,建立小型铅基堆堆芯功率控制系统,实现了LQG/LTR控制器参数在线调整,并开展了堆芯动态仿真研究。结果表明,基于蚁群算法的LQG/LTR控制器相较于传统LQG/LTR控制器更易达到稳定,且变化幅值更小。
语种：
中文
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基于CFD方法的高温热管特性研究
作者：
余清远;赵鹏程;马誉高
期刊：
核动力工程 ,2022年43(2):70-76 ISSN：0258-0926
作者机构：
[余清远; 赵鹏程] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[马誉高] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China;[余清远] 421001, China
关键词：
高温热管;计算流体力学(CFD);温度场;两相流场
摘要：
高温热管运行特性的分析与预测,对热管设计和应用具有重要意义。为分析高温热管内两相流动传热特性,首先建立钠热管的计算流体力学(CFD)分析模型,并对模型计算值与钠热管稳态实验数据进行对比校核,模拟结果与实验测点温度的绝对误差小于40℃,相对误差在5%以内;其次,利用本文模型与方法对不同传热功率和倾角下的热管内部流场特性进行分析研究。研究表明,均匀加热条件下,蒸气腔内的速度在蒸发段接近线性变化,而在冷凝段,气体流速减小致使压强回升,同时,蒸气的流动压降和速度随加热功率增加呈下降趋势;在热管水平和倾角运行工况,热管内两相流动压降中液相压降均占主导;而气液间剪切效应中,气体流动速度为主导效应。本文模型可为热管堆等高温热管应用领域提供热管设计与分析方法。
语种：
中文
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Sulfonation of chitosan for enhanced sorption of Li(I) from acidic solutions – Application to metal recovery from waste Li-ion mobile battery
作者：
Hamza, Mohammed F.;Mira, Hamed;Wei, Yuezhou;Aboelenin, Salama M.;Guibal, Eric;...
期刊：
Chemical Engineering Journal ,2022年441:135941 ISSN：1385-8947
通讯作者：
Wei, Yuezhou(yzwei@usc.edu.cn)
作者机构：
[Wei, Yuezhou; Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Heng Yang 421001, Peoples R China.;[Mira, Hamed; Hamza, Mohammed F.] Nucl Mat Author, POB 530,El-Maadi, Cairo, Egypt.;[Wei, Yuezhou] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai, Peoples R China.;[Aboelenin, Salama M.] Turabah Univ Coll, Taif Univ, Biol Dept, At Taif, Saudi Arabia.;[Guibal, Eric] IMT Mines Ales, Polymers Compos & Hybrids PCH, Ales, France.
通讯机构：
[Yuezhou Wei] S;[Eric Guibal] P;School of Nuclear Science and Technology, University of South China, Heng Yang 421001, PR China<&wdkj&>School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, PR China<&wdkj&>Polymers Composites and Hybrids (PCH), IMT Mines Ales, Alès, France
关键词：
At pH 2.2 sulfonated chitosan selectively recovers lithium from acidic leachate of mobile phone Li-ion battery (for sustainable valorization of strategic metal);High stability in performances of sorption and desorption for eighteen cycles;Lithium sorption remains highly selective for Li(I) against alkali-earth and heavy metals;The sulfonation of chitosan strongly enhances the recovery of lithium from aqueous solutions;Uptake kinetics are fitted by the pseudo-first-order rate equation and sorption isotherms by the Langmuir dual site equation
摘要：
The functionalization of cross-linked chitosan (Chito) by an original sulfonating process allows synthesizing a highly efficient sorbent (Sulfo-C) for Li(I) recovery from acidic solution (at pH ≈2). FTIR and XPS analyses show the main contributions of amine and sulfonic groups in the binding mechanism. Maximum sorption capacity reaches 20 mmol Li g−1, and the sorption isotherms are fitted by the Langmuir Dual Site equation; the process being spontaneous, exothermic and enthalpy-driven. The sorption remains highly efficient in 1 M NaCl solution, while the uptake remains strongly selective in the presence of equimolar concentrations of alkali-earth and heavy elements (Fe > Zn > Mg > Ca > Ni > Al cations). This selectivity (SCLi/Metal varying between 14 and 36) is controlled by the pH (optimum close to 2.2) and slightly increases (up to 16–69) with adding oxalic acid (1% w/w). The equilibrium is achieved, under selected experimental conditions, within 30–90 min of contact (depending on temperature). Uptake kinetics are fitted by the pseudo-first order rate equation, though the contribution of resistance to intraparticle diffusion cannot be neglected. Bound metal can be completely desorbed using hydrochloric acid solution (0.2 M); the kinetics of desorption is fast (within 20 to 30 min). Both sorption and desorption performances are remarkably stable for 18 cycles (loss in sorption less than 10.4% at the 18th cycle). The functionalized sorbent is highly efficient for the recovery of lithium from a spent Li-ion battery (mobile cell battery). The sorbent shows high selectivity for Li(I) against Co(II), Mn(II), Ni(II), Fe(III) and Al(III) (SCLi/Metal: 26–85); much lower against Cd(II) (i.e., 2.3). © 2022 Elsevier B.V.
语种：
英文
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Resonant power absorption in nonuniform toroidal helicon plasma sources
作者：
Du, Dan;Qiao, Guan Jin;Pan, Guang Zu;Yang, Kai Jian;Xiang, Dong;...
期刊：
Fusion Engineering and Design ,2022年176 ISSN：0920-3796
通讯作者：
Gong, XY
作者机构：
[Du, Dan] Univ South China, Dept Math & Phys, Hengyang 421001, Peoples R China.;[Yang, Kai Jian; Qiao, Guan Jin] Univ South China, Dept Elect Engn, Hengyang 421001, Peoples R China.;[Pan, Guang Zu; Gong, Xue Yu; Xiang, Dong] Univ South China, Dept Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Gong, XY] Univ South China, Hengyang, Peoples R China.
通讯机构：
[Gong, XY ] U;Univ South China, Hengyang, Peoples R China.
关键词：
Double-saddle antenna;Helicon plasma;Resonant power absorption;Standing wave
摘要：
In this paper, we present numerical simulation results that indicate that under certain conditions, a double-saddle antenna can excite helicon modes that resonate with the driving frequency in a nonuniform toroidal plasma, and m=1 and m=2 resonant standing helicon waves can separate or coexist in the toroidal plasma. The power absorption associated with the resonant standing wave is much larger than the power absorption associated with the nonresonant eigenmodes and accounts for most of the RF power deposited into the plasma. By adjusting the antenna frequency and wavenumber kz, the wave field structure, such as the standing wave pattern, the partially travelling-partially standing wave structure and the standing wave structure with amplitude modulation, can be controlled, which means that one can possibly control the resonant power absorption through careful antenna geometry and frequency design. © 2022
语种：
英文
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Novel NbCo-MOF as an advanced peroxymonosulfate catalyst for organic pollutants removal: Growth, performance and mechanism study
作者：
Li, Zengzhiqiang;Ning, Shunyan;Zhu, Hao;Wang, Xinpeng;Yin, Xiangbiao;...
期刊：
Chemosphere ,2022年288:132600 ISSN：0045-6535
通讯作者：
Yin, XB;Ning, SY
作者机构：
[Wang, Xinpeng; Fujita, Toyohisa; Li, Zengzhiqiang; Ning, Shunyan; Zhu, Hao] Guangxi Univ, Sch Resources Environm & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China.;[Yin, Xiangbiao; Wei, Yuezhou] Univ South China, Sch Nucl Sci & Technol, 28 Changsheng West Rd, Hengyang 421001, Peoples R China.;[Ning, Shunyan] Guangxi Univ, Sch Resources Environm & Mat, 100 Daxue Rd, Nanning 530004, Guangxi, Peoples R China.
通讯机构：
[Yin, XB ] U;[Ning, SY ] G;Univ South China, Sch Nucl Sci & Technol, 28 Changsheng West Rd, Hengyang 421001, Peoples R China.;Guangxi Univ, Sch Resources Environm & Mat, 100 Daxue Rd, Nanning 530004, Guangxi, Peoples R China.
关键词：
NbCo-MOF;Peroxymonosulfate activation;Removal;Tetracycline
摘要：
Multivariate metal-organic frameworks (MTV-MOFs) are expected as catalyst to apply to the advanced oxidation processes (AOPs) based on sulfate radical (SO4·−) to treat wastewater containing organic pollutants. Mixing metals de novo method was combined with stringent solvothermal conditions to synthesize macaroon-like NbCo-MOF catalyst. NbCo-MOF catalyst prepared with different atom ratios and growth time presented various morphology, structure, performance, and distinctive MTV-MOFs growth law which were confirmed by SEM, TEM, EDS, XRD, FTIR, raman spectra and UV–vis spectra. Besides, optimum peroxymonosulfate (PMS) catalytic activation conditions were studied. Furthermore, the effects of anions (Cl−, NO3−, HCO3−, and C2O42−) on NbCo-MOF catalytic activation were explored which were proved very limited. Particularly, the Co2+/Co3+ cycle combining with the Nb4+/Nb5+ cycle for PMS activation were verified by XPS. EPR and quenching experiment results indicated exists non-radical pathway (1O2), but radical pathways are dominant (SO4·− O2·−, and ·OH). Moreover, the TC removal rate exhibited no significant reduce after three times run. Furthermore, NbCo-MOF exhibited excellent decomposing ability towards methylene blue, tylosin tartrate, rhodamine B, and tetracycline with the removal rate reaching to 100%, 98.4%, 99.7%, and 99.7% in 30 min respectively and also maintained good performance in actual water environment. © 2021
语种：
英文
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Fabrication of nano-layer-structure alumina powders from an alumina concentrate through an intensified Bayer process
作者：
Gao, Feng;Li, Hui;Zhang, Jihao;Zhu, Yuanyi;Wang, Youbin;...
期刊：
Chemical Engineering and Processing - Process Intensification ,2022年175:108907 ISSN：0255-2701
通讯作者：
Gao, F
作者机构：
[Fujita, Toyohisa; Gao, F; Wang, Youbin; Zhang, Jihao; Zhu, Yuanyi; Li, Hui; Gao, Feng; Wang, Kaituo] Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China.;[Fujita, Toyohisa; Wang, Youbin; Zhang, Jihao; Zhu, Yuanyi; Li, Hui; Gao, Feng; Wang, Kaituo] Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China.;[Wei, Yuezhou] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Gao, F ] G;Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China.
关键词：
Al2O3 concentrate;Thermodynamic analysis;Kinetic analysis;Orthogonal experiments;Al2O3 powders
摘要：
An intensified Bayer process (high temperature, high pressure, and high alkalinity) was used to recover Al2O3 to prepare nano-layer-structure Al2O3 powders using Al2O3 concentrate separated from large-scale pyrite tailings as the raw material. This process consisted of four main steps: pretreatment of the concentrate, leaching of the Al2O3, decomposition of the sodium aluminate solution, and sintering of the decomposed product at a high temperature. The results of the orthogonal leaching experiment revealed that the relative leaching efficiency (ηR) of Al2O3 reached 98.28% under the optimum conditions: TL = 280 °C, tL = 90 min, cNaOH = 9 N, and L/S = 4. The results of the kinetic analysis indicated that the leaching reactions followed the unreacted-shrinkage-nuclear-reaction model controlled by solid film diffusion. After decomposition and sintering under proper conditions, fine Al2O3 powders composed of many tiny clusters with a nano-layer structure were finally prepared. The purity of the Al2O3 products reached 99.23%, and all of the chemical compositions of the Al2O3 products nearly met the grade I quality standard requirement in China. Additionally, TiO2 was effectively enriched to 9.74% in the leaching residue. This study demonstrated that the concentrates with abundant reserves were an important Al2O3 resource. © 2022 Elsevier B.V.
语种：
英文
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Validation of 3D discrete ordinate transport code with the practical engineering shielding calculation benchmark problems
作者：
Yang, Chao;Deng, Li;Yu, Tao;Fu, Yuanguang;Li, Zhipeng;...
期刊：
Annals of Nuclear Energy ,2022年176:109295 ISSN：0306-4549
通讯作者：
Yang, Chao(yangc066@163.com)
作者机构：
[Chen, Zhenping; Yang, Chao; Yu, Tao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421200, Peoples R China.;[Chen, Zhenping; Yang, Chao; Yu, Tao] Univ South China, Res Ctr Digital Nucl Reactor Engn & Technol Hunan, Hengyang 421200, Peoples R China.;[Deng, Li; Fu, Yuanguang; Li, Zhipeng] Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China.
通讯机构：
[Chao Yang; Tao Yu] S;School of Nuclear Science and Technology, University of South China, Hengyang 421200, China<&wdkj&>Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hengyang 421200, China
关键词：
Discrete ordinate method;Neutron source;Shielding calculation benchmark;Validation
摘要：
This paper introduces extended validation works on JSNT-S code based on two practical engineering shielding calculation problems, the PWR Pressure Vessel Fluence Calculation Benchmark (PWR benchmark) and H. B. Robinson Unit 2 Pressure Vessel Benchmark (HBR-2 benchmark). The benchmarks put forward new challenges to the JSNT-S code, including the complexity of neutron source calculation, strong attenuation of the flux in the shielding material and modeling of complex shield structure geometry. SourceTrans code is developed to convert core pin-by-pin power distribution into neutron source, visual modeling code JLAMT is used to build 3D fine models. Neutronic parameters provided in the benchmark report are validated, including the 47 group neutron flux spectrum, E > 1 MeV flux, E > 0.1 MeV flux, rates of displacement per atom (DPA), activation reaction rate and so on. The results show that JSNT-S code has good accuracy in simulating the practical engineering shielding calculation, and extend the reference solutions for benchmark problems. © 2022 Elsevier Ltd
语种：
英文
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自然循环铅基快堆一回路系统驱动力的关键影响因素研究
作者：
翟鹏迪;朱恩平;赵鹏程;王天石;于涛
期刊：
核动力工程 ,2022年43(3):66-73 ISSN：0258-0926
通讯作者：
Zhao, Pengcheng(pengcheng.zhao@usc.edu.cn)
作者机构：
[Zhai, Pengdi; 朱恩平; 赵鹏程; 王天石; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang;Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
自然循环驱动力;冷/热池传热;非线性温度分布;反应堆压力容器壁散热;关键影响因素
摘要：
为深入研究影响自然循环铅基快堆一回路系统驱动力的关键因素，以自然循环铅基快堆SNCLFR-10为研究对象，构建了描述反应堆一回路自然循环稳态运行模型；分别从理论上量化分析冷/热池的热量传递、热源和热阱温度非线性分布、反应堆压力容器壁散热3种因素对自然循环能力的影响，并开展了相关数值模拟验证。结果表明，数值模拟结果与本研究理论计算值吻合较好；3种自然循环能力影响机制耦合作用将降低SNCLFR-10系统自然循环能力，导致自然循环流量与功率之间不再满足理论所得的1/3次方关系。
语种：
中文
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基于统一框架的多物理耦合方案研究与平台开发
作者：
钱冠华;于涛;杨涛;赵亚楠;赵鹏程
期刊：
核动力工程 ,2022年43(6):51-60 ISSN：0258-0926
通讯作者：
Yu, Tao(yutao29@sina.com)
作者机构：
[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hunan, Hengyang;[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] 421001, China<&wdkj&>Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hunan, Hengyang;[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] 421001, China
关键词：
数值反应堆;多物理耦合;统一耦合框架;开源集成平台;通用平台接口
摘要：
为实现反应堆多物理、多过程、高保真数值计算，捕捉堆芯内部更真实的物理学行为，本文深入研究了多物理程序耦合方案，并基于上层监控架构、串行计算模式、网格一一映射的显式耦合方案，依托开源集成平台SALOME、通用平台接口ICoCo、三维堆芯中子学程序ADPRES和系统热工水力程序RELAP5搭建了基于统一框架的多物理耦合平台。经NEACRP-L-335压水堆弹棒基准题验证表明，耦合平台计算结果与基准例题吻合良好，耦合平台在功率峰捕获上更加准确，可释放部分安全裕量；对瞬态末各参数的计算结果也有足够高的精度，证明了耦合平台可对反应堆多物理、多过程耦合工况进行更精细、更深入的数值计算与安全分析。
语种：
中文
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金属核燃料快中子脉冲堆核-热-力耦合计算方法研究
作者：
郭树伟;陈珍平;江新标;李达;张信一;...
期刊：
核动力工程 ,2022年43(4):31-37 ISSN：0258-0926
通讯作者：
Chen, ZhenPing(chzping@yeah.net)
作者机构：
[郭树伟; 陈珍平; 谢金森; 于涛] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;[江新标; 李达; 张信一; 王立鹏; 胡田亮] Northwest Institute of Nuclear Technology State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an;710024, China;[郭树伟] 421001, China<&wdkj&>Northwest Institute of Nuclear Technology State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an
关键词：
脉冲堆;核热力耦合;瞬态分析
摘要：
为确保快中子脉冲堆的运行安全，防止超临界脉冲对材料造成物理损伤，需要对快中子脉冲堆脉冲工况进行模拟分析。本研究针对金属核燃料快中子脉冲堆，基于点堆动力学方法、蒙特卡罗方法和有限元力学方法，对Godiva-I脉冲堆开展了核热力耦合计算分析研究。计算结果表明，反应性温度系数和裂变率与实验值吻合良好，反应性、温升、表面位移、表面应力与实际情况相符合。因此，本文建立的“核-热-力”耦合计算方法可应用于金属核燃料快中子脉冲堆的分析计算，具有一定的可靠性。
语种：
中文
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自然循环反应堆全寿期流量分配多目标优化研究
作者：
朱恩平;王婷;赵鹏程;凌煜凡;王天石;...
期刊：
核动力工程 ,2022年43(3):78-84 ISSN：0258-0926
通讯作者：
Zhao, Pengcheng(zhaopengcheng1030@163.com)
作者机构：
[朱恩平; 王婷; 赵鹏程; 凌煜凡; 王天石; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[朱恩平; 王婷; 赵鹏程; 凌煜凡; 王天石; 于涛] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
自然循环;流量分配;多目标优化;TOPSIS综合评价
摘要：
堆芯流量分配设计是自然循环反应堆堆芯结构优化的重点内容,对提升堆芯经济性和安全性具有重要意义。基于反应堆闭式并联多通道模型构建了局部最优流量分配计算模型,并对现有的流量分配方案进行分析,针对其局限性,提出了一种基于最佳时区的多目标综合评价法,可实现反应堆全寿期多目标流量分配优化计算;根据所提出的理论,结合TOPSIS综合评价法,以自然循环下最大输出功率、反应堆寿期内出口最大温差以及最大温差随时间变化标准偏差为属性值,开展小型长寿命自然循环铅铋快堆SPALLER-100的堆芯流量分配方案优化研究。研究结果表明,基于运行时间为3182 d功率分布所得SPALLER-100反应堆堆芯流量分配方案最佳,与基于寿期初功率分布所得流量分配方案相比,所得方案堆芯出口最大温差降低30 K,堆芯出口最大温差随时间变化的标准偏差降低41%,反应堆自然循环最大输出功率提高2.35%。
语种：
中文
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铅铋反应堆堆芯流量分区智能优化方法研究
作者：
凌煜凡;代圣齐;赵鹏程;朱恩平;王继锋;...
期刊：
核动力工程 ,2022年43(3):53-57 ISSN：0258-0926
通讯作者：
Zhao, Pengcheng(zhaopengcheng1030@163.com)
作者机构：
[凌煜凡; 代圣齐; 赵鹏程; 朱恩平; 王继锋; 唐欢] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China;[凌煜凡; 代圣齐; 朱恩平; 王继锋; 唐欢] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
关键词：
铅铋反应堆;流量分区;智能优化算法;量子遗传算法
摘要：
堆芯流量分区是实现堆芯出口温度展平的重要手段,合理地分区可以提高反应堆的安全性和经济性。本文将人工智能优化算法与单通道模型进行耦合,构建了反应堆堆芯流量分区计算模型,分别开展遗传算法、差分进化算法、量子遗传算法在反应堆流量分区问题上的收敛性分析。根据所得最优算法,分别以寿期初功率分布、各燃料组件在整个寿期内最大功率为样本数据,基于小型长寿命自然循环铅铋快堆SPALLER-100开展两种不同流量分区方案对比分析。研究结果表明,在3种智能优化算法中,量子遗传算法在反应堆流量分区问题上收敛性最佳,能较快地搜索到最优分区结果;基于寿期初功率分布样本数据所得燃料组件最大出口温度超出反应堆热工安全限值,而基于各燃料组件在整个寿期内最大功率所得燃料组件最大出口温度降低了140 K,且始终保持在热工安全限值之下;SPALLER-100反应堆最佳分区数为5,再增加分区数对提高反应堆热工安全性能影响较小。
语种：
中文
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Strontium Ion Removal From Artificial Seawater Using a Combination of Adsorption With Biochar and Precipitation by Blowing CO2 Nanobubble With Neutralization
作者：
Guo, Yixuan;Hong Nhung, Nguyen Thi;Dai, Xiang;He, Chunlin;Wang, Youbin;...
期刊：
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY ,2022年10:819407 ISSN：2296-4185
通讯作者：
Fujita, T
作者机构：
[He, Chunlin; Fujita, Toyohisa; Wang, Youbin; Guo, Yixuan; Dai, Xiang; Hong Nhung, Nguyen Thi; Fujita, T] Guangxi Univ, Sch Resources Environm & Mat, Nanning, Peoples R China.;[Wei, Yuezhou] Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China.;[Fujita, Toyohisa; Fujita, T] Guangxi Univ, Sch Chem & Chem Engn, Nanning, Peoples R China.
通讯机构：
[Fujita, T ] G;Guangxi Univ, Sch Resources Environm & Mat, Nanning, Peoples R China.;Guangxi Univ, Sch Chem & Chem Engn, Nanning, Peoples R China.
关键词：
Biochar1;Adsorption2;Strontium radionuclide3;Seawater4;CO2 nanobubbles5
摘要：
While enjoying the convenience of nuclear energy development, the environmental contamination by radionuclide leakage is of significant concern. Because of its cost-effectiveness and environmental friendliness, biochar has attracted a lot of attention in the field of radioactive water treatment. Herein, a novel teak peel modified biochar (labeled as PMBN3) was prepared and applied to remove strontium from artificial seawater. The characterisation of the prepared PMBN3 showed it contains numerous oxygen-containing functional groups (i.e. carboxyl and hydroxyl groups), laminar morphology, mesoporous structure, large specific surface area. PMBN3 exhibited great advantages in Sr(II) adsorption, such as rapid adsorption kinetics (<1h for equilibrium) and superior reusability. The adsorption of strontium by biochar is consistent with pseudo-second order and internal diffusion kinetic models. Among the four types of adsorption isotherms, the Freundlich isotherm showed the best fit with R2 > 0.98. The calculated thermodynamic parameters indicate that strontium adsorption on biochar occurs exothermically and spontaneously. Furthermore, for efficient removal of Sr(II), CO2 nanobubbles were blown into artificial seawater to precipitate the interfering metal ions, and followed by the adsorption of PMBN3 towards residual metal ions with the removal rate of Sr(II) over 99.7%. Finally, mechanistic studies have shown that the strontium adsorption process by PMBN3 is a multiple adsorption mechanism consisting of ion exchange between H+ (from -OH and -COOH) and Sr(II), and weak intermolecular forces between Sr(II) and the PMBN3 adsorbent. This study creatively combines chemisorption and nanobubble precipitation for strontium removal, which provides great reference value and guidance for environmental remediation. Copyright © 2022 Guo, Hong Nhung, Dai, He, Wang, Wei and Fujita.
语种：
英文
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