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Dynamic simulation of a space gas-cooled reactor power system with a closed Brayton cycle

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 916-929 doi: 10.1007/s11708-021-0757-9

Abstract: Space nuclear reactor power (SNRP) using a gas-cooled reactor (GCR) and a closed Brayton cycle (CBC) is the ideal choice for future high-power space missions. To investigate the safety characteristics and develop the control strategies for gas-cooled SNRP, transient models for GCR, energy conversion unit, pipes, heat exchangers, pump and heat pipe radiator are established and a system analysis code is developed in this paper. Then, analyses of several operation conditions are performed using this code. In full-power steady-state operation, the core hot spot of 1293 K occurs near the upper part of the core. If 0.4 $ reactivity is introduced into the core, the maximum temperature that the fuel can reach is 2059 K, which is 914 K lower than the fuel melting point. The system finally has the ability to achieve a new steady-state with a higher reactor power. When the GCR is shut down in an emergency, the residual heat of the reactor can be removed through the conduction of the core and radiation heat transfer. The results indicate that the designed GCR is inherently safe owing to its negative reactivity feedback and passive decay heat removal. This paper may provide valuable references for safety design and analysis of the gas-cooled SNRP coupled with CBC.

Keywords： gas-cooled space nuclear reactor power     closed Brayton cycle     system startup and shutdown     positive reactivityinsertion accident    

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Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin

Yuya Dou, Xiaodan Zhang, Yang Li, Fenfen Wang, Xing Xie, Xinyu Wang

Frontiers of Medicine 2017, Volume 11, Issue 2,   Pages 223-228 doi: 10.1007/s11684-017-0517-8

Abstract: triage for the management of cervical high-grade squamous intraepithelial lesion (HSIL) patients with positiveClinico-pathological data of HSIL patients with positive margin by conization were retrospectively collectedNearly half of HSIL patients with positive margin by conization were disease-free in subsequent surgicalspecimens, and those with multiple positive margins may consider re-conization or re-assessment.

Keywords： cervical high-grade squamous intraepithelial lesion     conization     positive surgical margin     hysterectomy    

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NO conversion by positive streamer discharge—effects of gas compositions and reaction conditions

HE Wei, ZHU Tianle, LI Jing

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 153-158 doi: 10.1007/s11783-007-0027-z

Abstract: The effects of gas compositions and reaction conditions on NO conversion by positive streamer discharge

Keywords： conversion     streamer discharge     wheel-cylinder     positive streamer    

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Genetic Study Identifies CBLN4 as a Novel Susceptibility Gene for Accident Proneness

Shu-lin Zhang,Hui-qing Jin,Yang Song,Wan-sheng Yu,Liang-dan Sun

Frontiers of Engineering Management 2016, Volume 3, Issue 1,   Pages 30-38 doi: 10.15302/J-FEM-2016008

Abstract: The accident-prone driver who has the stable physiological, psychological, and behavioral characteristicsThe internal link between the individual characteristics and the accident proneness has been a difficultpoint in the accident prevention research.The authors selected accident-prone drivers as cases and safe drivers as controls (case-control groupIt is suggested that the accident-prone drivers may have the idiosyncrasy of susceptibility.

Keywords： accident proneness     genome-wide association study (GWAS)     dopamine (DA)     ACTH     susceptibility gene     trafficaccident epidemiology     accident prevention     traffic safety     three-dimensional model    

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To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Strategic Study of CAE 2007, Volume 9, Issue 2,   Pages 5-11

Abstract: proposition, definition, classification and characteristic of biological economy, also, the importance of positiveIt also discusses which views of happiness should be recommended and how to practice a positive view

Keywords： biological economy     happiness     positive view of happiness    

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Study on Inherent Safety-based Industrial Accident Risk Management Method

Wu Zongzhi

Strategic Study of CAE 2007, Volume 9, Issue 5,   Pages 46-49

Abstract:  procedural safeguard, layers of protection and the standards of function safety to reduce the accident

Keywords： inherent safety     risk management     accident prevention     safety design    

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Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breast

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

Frontiers of Medicine 2021, Volume 15, Issue 4,   Pages 621-628 doi: 10.1007/s11684-020-0738-0

Abstract: significance of the 21-gene recurrence score (RS) in Chinese patients with pN0-1, estrogen receptor-positive

Keywords： early breast cancer     21-gene assay     recurrence score     prognosis    

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Total phosphorus accident pollution and emergency response study based on geographic information system

Aifeng Zhai, Xiaowen Ding, Lin Liu, Quan Zhu, Guohe Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1223-3

Abstract: A new algorithm of two-dimensional water quantity and the quality model was built. The migration and diffusion of TP was simulated. The emergency measures for sudden water pollution accidents was proposed. In recent years, sudden water pollution accidents in China’s rivers have become more frequent, resulting in considerable effects on environmental safety. Therefore, it is necessary to simulate and predict pollution accidents. Simulation and prediction provide strong support for emergency disposal and disaster reduction. This paper describes a new two-dimensional water quantity and the quality model that incorporates a digital elevation model into the geographic information system. The model is used to simulate sudden water pollution accidents in the main stream of the Yangtze River and Jialing River in the Chongqing section of the Three Gorges Reservoir area. The sectional velocity distribution and concentration change of total phosphorus are then analyzed under four hydrological situations. The results show that the proposed model accurately simulates and predicts the concentration change and migration process of total phosphorus under sudden water pollution accidents. The speed of migration and diffusion of pollutants is found to be greatest in the flood season, followed by the water storage period, drawdown season, and dry season, in that order. The selection of an appropriate water scheduling scheme can reduce the peak concentration of river pollutants. This study enables the impact of pollutants on the ecological environment of river water to be alleviated, and provides a scientific basis for the emergency response to sudden water pollution accidents in the Three Gorges Reservoir area.

Keywords： Sudden water pollution accident     Total phosphorus     Predictive model     Contaminant simulation     Water scheduling    

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The Hypothesis of Safety Theory

Yu Haiyong,Li Fang

Strategic Study of CAE 2006, Volume 8, Issue 10,   Pages 85-88

Abstract: Three basic types of accidents are proposed in this paper, that is, inevitable, random and man-fault accident

Keywords： safety theory     accident type     mathematical equation     accident prevention    

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The important revelation of “7·23” passenger train accident

Sun Yongfu

Strategic Study of CAE 2012, Volume 14, Issue 12,   Pages 4-9

Abstract: p style="text-align: justify;">The process and reasons of “7·23” passenger train accident

Keywords： passenger train accident     the research and development management     the access management     the emergency    

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Simulation analysis of environmental risk accident and management of high-sulfur gas field development

WANG Xiao, HAO Fanghua, ZHANG Xuan, SUN Wen, CHENG Hongguang

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 318-325 doi: 10.1007/s11783-008-0033-9

Abstract: Environmental risk of high sulfur gas field exploitation has become one of the hot spots of environmental management studies. Severe gas HS blowout accidents in recent years have shown that poor understanding and estimates of the poisonous gas movement could lead to dangerous evacuation delays. It is important to evaluate the real concentration of HS, especially in complex terrain. Traditional experiential models are not valid in the case of rough terrain, especially in low-lying areas where the gas accumulates. This study, using high sulfur content gas field of Sichuan “Pu Guang gas field” as study object and adopting objective diagnosis of wind field of land following coordinate three dimensions, applied Lagrangian Puff Model and breaking up technique of puffs to simulate the HS diffusion condition of blowout accidents produced in the high sulfur content gas field of complex terrain area. The results showed that the HS distribution did not occur mainly in low wind direction, and due to the obstruction of the mountain’s body, it accumulated in front of mountain on produced turn over, flowed around submitted jumping type distribution. The mountain waist near the hilltop and low hollow river valley site rapture points simulating contrast showed that the higher the rapture point, the better the diffusing condition of pollutant, the distribution of risk sensitive point decided piping rupture environmental risk size combining the HS diffusion result and residential area dispersing in the study area, synthetic judge located in the high rapture point environmental risk was smaller than the low hollow point, thus it was suggested to carryout laying of lining build of equal high line of higher terrain. According to simulation results, the environmental risk management measures aimed at putting down adverse effects were worked out.

Keywords： mountain ’     rapture     Lagrangian     hollow     produced    

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Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 440-444 doi: 10.1007/s11684-017-0523-x

Abstract:

Philadelphia chromosome-positive acute myeloid leukemia is controversial and difficult to distinguishand BCR-ABL1 fusion gene together with complex chromosome abnormalities, a diagnosis of Philadelphia-positive

Keywords： Philadelphia chromosome     acute myeloid leukemia     mass     osteolysis     positron emission tomography    

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Oxidation performance of graphite material in reactors

LUO Xiaowei, YU Xinli, YU Suyuan

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 471-474 doi: 10.1007/s11708-008-0074-6

Abstract: influences the safety and operation of the reactor because of the impurities in the coolant and/or the accident

Keywords： ingress     accident     oxidation     coolant     moderator    

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EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Frontiers of Agricultural Science and Engineering   Pages 285-295 doi: 10.15302/J-FASE-2022469

Abstract:

● Transport stress declined the level of leukocytes including lymphocytes in rat serum.

Keywords： intestine     nNOS     nNOS-positive neurons     transport stress    

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Insight of chemical environmental risk and its management from the vinyl chloride accident

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 4, doi: 10.1007/s11783-023-1652-x

Abstract: The combustion of vinyl chloride (VC) after the train derailment accident in Ohio, USA in February, 2023This paper tried to analyze several issues concerning the accident, including the appropriateness ofthe VC combustion in the emergency response in this accident, the meanings of so-called “controlled combustionIn our view, this accident had surely caused environmental and health risks to some extent.Finally, this accident suggests that further efforts should be taken to bridge the gap between chemical

Keywords： Vinyl chloride     Combustion     Chemical safety management     Environmental risk     Emerging contaminants    

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Title Author Date Type Operation

Dynamic simulation of a space gas-cooled reactor power system with a closed Brayton cycle

Journal Article

Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin

Yuya Dou, Xiaodan Zhang, Yang Li, Fenfen Wang, Xing Xie, Xinyu Wang

Journal Article

NO conversion by positive streamer discharge—effects of gas compositions and reaction conditions

HE Wei, ZHU Tianle, LI Jing

Journal Article

Genetic Study Identifies CBLN4 as a Novel Susceptibility Gene for Accident Proneness

Shu-lin Zhang,Hui-qing Jin,Yang Song,Wan-sheng Yu,Liang-dan Sun

Journal Article

To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Journal Article

Study on Inherent Safety-based Industrial Accident Risk Management Method

Wu Zongzhi

Journal Article

Prognostic value of the 21-gene recurrence score in ER-positive, HER2-negative, node-positive breast

Jiayi Wu, Weiqi Gao, Xiaosong Chen, Chunxiao Fei, Lin Lin, Weiguo Chen, Ou Huang, Siji Zhu, Jianrong He, Yafen Li, Li Zhu, Kunwei Shen

Journal Article

Total phosphorus accident pollution and emergency response study based on geographic information system

Aifeng Zhai, Xiaowen Ding, Lin Liu, Quan Zhu, Guohe Huang

Journal Article

The Hypothesis of Safety Theory

Yu Haiyong,Li Fang

Journal Article

The important revelation of “7·23” passenger train accident

Sun Yongfu

Journal Article

Simulation analysis of environmental risk accident and management of high-sulfur gas field development

WANG Xiao, HAO Fanghua, ZHANG Xuan, SUN Wen, CHENG Hongguang

Journal Article

Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Journal Article

Oxidation performance of graphite material in reactors

LUO Xiaowei, YU Xinli, YU Suyuan

Journal Article

EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Journal Article

Insight of chemical environmental risk and its management from the vinyl chloride accident

Journal Article