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CFD Simulation of thermal hydraulic characteristics in a typical upper plenum of RPV

Mingjun WANG, Lianfa WANG, Yingjie WANG, Wenxi TIAN, Jian DENG, Guanghui SU, Suizheng QIU

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 930-945 doi: 10.1007/s11708-021-0728-1

Abstract: A comparative computational fluid dynamics (CFD) study was conducted on the three different types of pressurized water reactor (PWR) upper plenum, named TYPE 1 (support columns (SCs) and control rod guide tubes (CRGTs) with two large windows), TYPE 2 (SCs and CRGTs without windows), and TYPE 3 (two parallel perforated barrel shells and CRGTs). First, three types of upper plenum geometry information were collected, simplified, and adopted into the BORA facility, which is a 1/5 scale system of the four-loop PWR reactor. Then, the geometry, including the upper half core, upper plenum region, and hot legs, was built using the platform. After that, an unsteady calculation to simulate the reactor balance operation at hot full power scenario was performed. Finally, the differences of flowrate distribution at the core outlet and temperature distribution and transverse velocity inside the hot legs with different upper plenum internals were compared. The results suggest that TYPE 1 upper plenum internals cause the largest flowrate difference at the core outlet while TYPE 3 leads to the most even distributed flowrate. The distribution and evolution pattern of the tangential velocity inside hot legs is highly dependent on the upper plenum internals. Two counter-rotating swirls exist inside the TYPE 1 hot leg and only one swirl revolving around the hog leg axis exist inside the TYPE 2 hot leg. For TYPE 3, two swirls like that of TYPE 1 rotating around the hot leg axis significantly increase the temperature homogenization speed. This research provides meaningful guidelines for the future optimization and design of advanced PWR upper plenum internal structures.

Keywords： pressurized water reactor (PWR)     upper plenum     internal structures     temperature distribution     computational fluid dynamics (CFD)    

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Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1585-9

Abstract:

● The physicochemical and structural properties of DBC were characterized.

Keywords： Dissolved black carbon (DBC)     Chlorine     Chloramine     Disinfection by-products (DBPs)     Disinfection by-products formation potential (DBPFP)    

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The Basic Characteristics of the Yangbajing Geothermal Field-A Typical High Temperature Geothermal System

Duo Ji

Strategic Study of CAE 2003, Volume 5, Issue 1,   Pages 42-47

Abstract:

The Yangbajing Geothermal Field is one of non-volcanic high-temperature geothermal fields. The Yangbajing convective system consists of two reservoirs at different depth. The shallow reservoir is constitued of loose alluvium of Quanternary and altered granite of Himalaya. Temperature inside the shallow reservoir is in the range of 150〜165℃ at the depth of 180〜280 m. Shallow thermal water is of sodium chlorite type and mixture of deep hot water and cold groundwater. The deep reservoir is in a slip-fault zone of the core complex. It is a veinor zone-shape reservoir. The deep reservoir can be divided into two parts. The upper parts of temperature 251℃ is at depths ranging from 950m to 1350 m. The lower part is below 1850 m , in which the measured temperature is as high as 329℃ . The deep thermal water is of sodium chlorite type, too. Carbon dioxide-is a major non-condensate gas in the shallow and deep reservoir.

Keywords： high temperature geothermal     thermal reservoirs     genesis     Yangbajing     Tibet    

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Evaluation of a typical plateau deep lake by DOM spectral characteristics

Tian Linfeng,Hu Jiwei,Li Cunxiong,Huang Xianfei,Xie Weifang

Strategic Study of CAE 2010, Volume 12, Issue 6,   Pages 80-84

Abstract: spectroscopy and fluorescence spectrophotometer are often used as an effective way for extracting DOM characteristicsIn the present research, spectral characteristics of DOM were studied in water samples from differentIt is found, however, that spectral characteristics of the water samples from sites HWHDC, BHHX and ZG

Keywords： dissolved organic matter     ultraviolet-visible spectral characteristics     fluorescence spectroscopy     correlations    

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Effect of the ultraviolet/chlorine process on microbial community structure, typical pathogens, and antibiotic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1521-z

Abstract:

• UV/chlorine can effectively remove VBNC pathogens, ARGs and MGEs in reclaimed water.

Keywords： UV/chlorine process     Pathogen     Antibiotic resistance genes     High-throughput qPCR     Reclaimed water    

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Measurement and analysis of typical motion error traces from a circular test

LI Xiaoli, LIU Huanlao

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 146-150 doi: 10.1007/s11465-008-0033-2

Abstract: The typical motion errors represented by the corresponding Fourier components can thus be identified.

Keywords： machine compensation     direction     combination     desired     efficient    

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Formation, distribution and resource evaluation of tight oil in China

Pang Zhenglian,Zou Caineng,Tao Shizhen,Yang Zhi,Wu Songtao

Strategic Study of CAE 2012, Volume 14, Issue 7,   Pages 60-67

Abstract:

The formation conditions and typical characteristics of oversea typicalAccording to the study, typical tight oil plays oversea are characterized by “3 formation conditions” and “7 basic characteristics”.The 7 basic characteristics involve indefinite trap boundaries, no-buoyance accumulation and inapparentBased on these two aspects, the formation conditions and typical characteristics of tight oil in China

Keywords： tight oil in China     exploration progress     forming conditions     typical characteristics     resource potential    

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Occurrence and fate of typical antibiotics in wastewater treatment plants in Harbin, North-east China

Weihua Wang, Wanfeng Zhang, Hong Liang, Dawen Gao

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 3, doi: 10.1007/s11783-019-1118-3

Abstract:

• The concentration distributions and removals of 12 antibiotics were investigated.

• Macrolides and fluoroquinolones presented relatively higher concentrations.

• The removal of antibiotics did not differ among the different treatment processes.

Keywords： Antibiotics     WWTPs     Occurrence     Removal efficiency    

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Multimedia distribution and health risk assessment of typical organic pollutants in a retired industrial

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1742-9

Abstract:

● A fine portrayal of organic pollutants in a retired industrial park is provided.

Keywords： Organic pollutants     Retired industrial park     Spatial correlation     Health risk assessment    

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Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 129-134 doi: 10.1007/s11465-016-0392-z

Abstract: finite element analysis (FEA) to reflect coupled factors in affecting the modelling accuracy of two typical

Keywords： coupling factors     modelling accuracy     compliant mechanisms     equivalent modulus    

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Hexachlorobutadiene emissions from typical chemical plants

Minxiang Wang, Lili Yang, Xiaoyun Liu, Zheng Wang, Guorui Liu, Minghui Zheng

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1352-8

Abstract: Abstract • Unintentional HCBD production in typical chemical plants was investigated. • The highestThe results indicate the concentrations of HCBD unintentionally produced in typical chemical plants and

Keywords： Hexachlorobutadiene     Chemical plant     Chlorobenzene     Trichloroethylene     Tetrachloroethylene    

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Structural optimization of typical rigid links in a parallel kinematic machine

Xinjun LIU, Zhidong LI, Xiang CHEN

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 344-353 doi: 10.1007/s11465-011-0227-x

Abstract: dynamics and accuracy of parallel kinematic machines largely depend on the weights and rigidity of typicalThis work employs the techniques of topology and size optimization to design two typical rigid links

Keywords： topology optimization     size optimization     parallel kinematic machine (PKM)    

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Hydraulic properties of typical salt-affected soils in Jiangsu Province, China

CHEN Xiaomin, SHEN Qirong, XU Yangchun

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 443-447 doi: 10.1007/s11783-007-0070-9

Abstract: Every year about 1,500 ha of land is reclaimed from the sea along the coastline of Jiangsu Province, China. It is important to characterize the hydraulic properties of this reclaimed land to be able to predict and manage salt and wa

Keywords： hydraulic     Jiangsu Province     coastline     important     reclaimed    

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Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1467-6

Abstract:

• A full scale biofilm process was developed for typical domestic wastewater

Keywords： Full scale     Anammox     Domestic wastewater     Biofilm     Candidatus Brocadia    

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Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1605-4

Abstract:

● Six largely produced agricultural biomass wastes were pyrolyzed into biochars.

Keywords： Plastic pollution     Phthalic acid esters     Designed biochar     Wetland plant     Adsorption    

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Title Author Date Type Operation

CFD Simulation of thermal hydraulic characteristics in a typical upper plenum of RPV

Mingjun WANG, Lianfa WANG, Yingjie WANG, Wenxi TIAN, Jian DENG, Guanghui SU, Suizheng QIU

Journal Article

Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

Journal Article

The Basic Characteristics of the Yangbajing Geothermal Field-A Typical High Temperature Geothermal System

Duo Ji

Journal Article

Evaluation of a typical plateau deep lake by DOM spectral characteristics

Tian Linfeng,Hu Jiwei,Li Cunxiong,Huang Xianfei,Xie Weifang

Journal Article

Effect of the ultraviolet/chlorine process on microbial community structure, typical pathogens, and antibiotic

Journal Article

Measurement and analysis of typical motion error traces from a circular test

LI Xiaoli, LIU Huanlao

Journal Article

Formation, distribution and resource evaluation of tight oil in China

Pang Zhenglian,Zou Caineng,Tao Shizhen,Yang Zhi,Wu Songtao

Journal Article

Occurrence and fate of typical antibiotics in wastewater treatment plants in Harbin, North-east China

Weihua Wang, Wanfeng Zhang, Hong Liang, Dawen Gao

Journal Article

Multimedia distribution and health risk assessment of typical organic pollutants in a retired industrial

Journal Article

Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Journal Article

Hexachlorobutadiene emissions from typical chemical plants

Minxiang Wang, Lili Yang, Xiaoyun Liu, Zheng Wang, Guorui Liu, Minghui Zheng

Journal Article

Structural optimization of typical rigid links in a parallel kinematic machine

Xinjun LIU, Zhidong LI, Xiang CHEN

Journal Article

Hydraulic properties of typical salt-affected soils in Jiangsu Province, China

CHEN Xiaomin, SHEN Qirong, XU Yangchun

Journal Article

Partial anammox achieved in full scale biofilm process for typical domestic wastewater treatment

Journal Article

Resource utilization of typical biomass wastes as biochars in removing plasticizer diethyl phthalate

Journal Article