Research & Development in Material Science最新文献

Experimental Simulation of Molten Corium and Sacrificial Material Interaction in a Scaled Down Core Catcher 缩小堆芯捕集器中熔融堆芯与牺牲材料相互作用的实验模拟

Research & Development in Material Science Pub Date : 2021-11-22 DOI: 10.31031/rdms.2021.16.000881

S. Munot

{"title":"Experimental Simulation of Molten Corium and Sacrificial Material Interaction in a Scaled Down Core Catcher","authors":"S. Munot","doi":"10.31031/rdms.2021.16.000881","DOIUrl":"https://doi.org/10.31031/rdms.2021.16.000881","url":null,"abstract":"During the severe accident condition involving the core melt, stabilization and cooling the molten corium for long duration is the primary requirement. To address this challenge, core catcher systems are being installed inside the containment of the advanced nuclear reactors. Few ex-vessel core catcher designs incorporate special refractory sacrificial material, which on interaction with molten corium, ablate and reduce the enthalpy of the molten pool. During the interaction, the components of ablated sacrificial material and molten corium are stratified in different layers due to density difference between them, i.e., the low density oxidic components stratify in the top layer while higher density metallic components stratify in the bottom layers in the melt pool. This manuscript presents the material characterization of the stratified melt pool after cooling in an experiment involving interaction of approx. 550kg of molten simulant corium with approx. 150kg of sacrificial material in a scaled down V-shaped ex-vessel core catcher vessel. The cooling strategy in the experiment was similar to prototypic reactor conditions. After cooling and stratification of the melt pool, solid samples from different locations and different heights were collected for SEM-EDS analysis for characterizations. The phenomena of melt inversion were verified in the post-test analysis.","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84575696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties in Fe-Doped ZnS Thin Films 掺铁ZnS薄膜的性能

Research & Development in Material Science Pub Date : 2021-11-16 DOI: 10.31031/rdms.2021.16.000879

Jafarli Rufat

引用次数: 1

Extending the Down Limit of Pore Size of Anodic TiO2 Nanotube Arrays 扩展阳极TiO2纳米管阵列孔径的下限

Research & Development in Material Science Pub Date : 2021-10-20 DOI: 10.31031/rdms.2021.15.000875

Hui Li

引用次数: 0

Effective Sonodegradation of Methylene Blue (MB) Organic Dye by Mil-88(Fe)/NaY/MnFe2O4 Nanocomposite Sonocatalyst in Aqueous Solution Mil-88(Fe)/NaY/MnFe2O4纳米复合声催化剂在水溶液中对亚甲基蓝(MB)有机染料的有效声降解

Research & Development in Material Science Pub Date : 2021-10-20 DOI: 10.31031/rdms.2021.16.000876

M. Sadeghi

引用次数: 0

Potential Sustainable Cement Free Limecrete Based on GGBS & Hydrated Lime as an Alternative for Standardised Prescribed Concrete Applications 基于GGBS和水合石灰的潜在可持续无水泥石灰作为标准化规定混凝土应用的替代方案

Research & Development in Material Science Pub Date : 2021-10-14 DOI: 10.31031/rdms.2021.15.000874

Ash Ahmed

{"title":"Potential Sustainable Cement Free Limecrete Based on GGBS & Hydrated Lime as an Alternative for Standardised Prescribed Concrete Applications","authors":"Ash Ahmed","doi":"10.31031/rdms.2021.15.000874","DOIUrl":"https://doi.org/10.31031/rdms.2021.15.000874","url":null,"abstract":"A fundamental issue with the active ingredient of concrete, Portland cement, is its energy-intensive manufacturing process, which has led to the cement industry emitting up to 10% of global CO2 levels. To facilitate the reduction in the embodied CO 2 of concrete, the Portland Cement (PC) content has been entirely replaced volumetrically with Hydrated Lime (HL) and ground granulated blast furnace slag (GGBS or SL). GGBS was used to replace hydrated lime content in 10% increments up to 100% GGBS. Analysis of compressive and flexural strength and density testing was performed on samples to investigate the mechanical and physical properties at 7, 28 and 91-day curing ages, whilst flexural testing was conducted at 91 days curing age. Four standard mix ratios, 1:1:3, 1:2:3, 1:1:2 and 2:1 was made for comparison. Two curing conditions were tested at 91-day curing age, these being air-cured and water curing. Results have shown the optimum mix ratio to be 1:1:2 for all mixes. The optimum mix being HL 1:1:2 SL80%, water cured exceeding 25MPa. Throughout the different ratios, it can be concluded that the optimum replacement of GGBS lies between 80-90%; it can also be noted that 100% GGBS content sees a significant drop in compressive and flexural strength, indicating the presence of hydrated lime to be a catalyst for strength gain.","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76600986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Freckle Formation Affected by Geometry Features of Single Crystal Superalloy Castings 单晶高温合金铸件几何特征对雀斑形成的影响

Research & Development in Material Science Pub Date : 2021-10-11 DOI: 10.31031/rdms.2021.15.000873

D. Ma

引用次数: 0

A Simplified Approach for Predicting the Time of Consolidation for a Multi-Layered Foundation 多层地基固结时间预测的简化方法

Research & Development in Material Science Pub Date : 2021-09-28 DOI: 10.31031/rdms.2021.15.000871

T. Duong

引用次数: 0

Applications of Electromagnetic Field to Continuous Casting Process of Steel 电磁场在钢连铸过程中的应用

Research & Development in Material Science Pub Date : 2021-09-15 DOI: 10.31031/rdms.2021.15.000870

H. Harada

引用次数: 0

Tailored Synthesis of PS@Ag@TiO2 Core-shell Nanocomposite for Photocatalytic Dye Degradation 用于光催化染料降解的PS@Ag@TiO2核壳纳米复合材料的定制合成

Research & Development in Material Science Pub Date : 2021-08-03 DOI: 10.31031/rdms.2021.15.000866

H. Acharya

引用次数: 0

LIDAR Monitoring of Urban Areas 城市地区激光雷达监测

Research & Development in Material Science Pub Date : 2021-08-03 DOI: 10.31031/rdms.2021.15.000867

N. I

{"title":"LIDAR Monitoring of Urban Areas","authors":"N. I","doi":"10.31031/rdms.2021.15.000867","DOIUrl":"https://doi.org/10.31031/rdms.2021.15.000867","url":null,"abstract":"The use of a LIDAR to monitor the air pollution makes it possible to control large city areas and detect the spatiotemporal location of Particulate Matter (PM) emissions sources. LIDAR monitoring is a fast method for estimating the pollution, respectively the mass concentration of PM in the atmospheric ground bioaerosol. The careful study of air pollution becomes especially relevant as the PM are potential carriers of solid-state particles dangerous to health and biologically active components. The present report summarizes our experience [1-3] on how the intricate complex of particles with different content and size found in the aerosol might affect the LIDAR monitoring results on the long distance. LIDAR subject of this study is capable of scanning and mapping the horizontal and vertical aerosol distributions and the transport of air masses with a range resolution along the Line of Sight (LOS) of 30m and a beam divergence of ~1 mrad at operational distances of about 25km [3]. The laser emitter (wavelength of 510.6nm) is a pulsed CuBr vapor laser with a repetition rate of 5-10kHz at a 15-ns pulse duration. The receiving system comprises a Carl Zeiss Jena Cassegrain telescope (aperture of 20cm and a focal distance of 1m), a 2-mm-wide focal diaphragm, an interference filter with a 2-nm-wide passband, and an EMI 9789 photo-multiplier tube operating in a photon-counting mode along the entire operational distance. The receiving system is fully computerized for collecting and processing the LIDAR data using a PCO 1001 1024-channel digital interface system for signal strobing and accumulation. The LIDAR monitoring was calibrated based on the data from a sampling absorber located just below the spot of the LIDAR beam with a flow rate of 100m /h, where the particles are collected on a filter with pore size 3µ m (FILTER-LAB, Material MCE, Lot.180509006).","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80143345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0