核科学与技术国际期刊(英文)最新文献

System Variables Design of Safety Analysis for Fast Reactors 快堆安全分析的系统变量设计

核科学与技术国际期刊(英文) Pub Date : 2023-01-01 DOI: 10.4236/wjnst.2023.132003

引用次数: 0

Numerical Analysis of Heating Technique in Corium Melt Pool Convection Flow Field & Thermal Interaction in a Volumetrically Heated Molten Pool 堆芯熔池加热技术数值分析体积加热熔池对流流场及热相互作用

核科学与技术国际期刊(英文) Pub Date : 2023-01-01 DOI: 10.4236/wjnst.2023.131001

M. Khan, Lubon Putul, S. Islam

引用次数: 0

Feasibility to Convert the NuScale SMR from UO₂ to a Mixed (U, Th)O₂ Core: A Parametric Study of Fuel Element—Seed-Blanket Concept NuScale SMR由UO2转换为混合(U, Th)O2堆芯的可行性:燃料元件-种子毯概念的参数化研究

核科学与技术国际期刊(英文) Pub Date : 2023-01-01 DOI: 10.4236/wjnst.2023.132002

Giovani Laranjo de Stefani, Diego Manoel Enedino Gonçalves, C. Raitz, Marcelo V. da Silva, Caio Július César Miranda Rodrigues da Cunha

引用次数: 2

Role of PET-CT (Positron Emission Tomography-Computed Tomography) in Cancer Evaluation and Treatment 正电子发射断层扫描(PET-CT)在癌症评估和治疗中的作用

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.121002

B. Vasundhara, P. Hemalatha, P.R.S.S.V. Raju

{"title":"Role of PET-CT (Positron Emission Tomography-Computed Tomography) in Cancer Evaluation and Treatment","authors":"B. Vasundhara, P. Hemalatha, P.R.S.S.V. Raju","doi":"10.4236/wjnst.2022.121002","DOIUrl":"https://doi.org/10.4236/wjnst.2022.121002","url":null,"abstract":"Context: Positron emission tomography is a nuclear medicine imaging that deals with physiological function using radioisotopes. With the most PET (Positron Emission Tomography) scanners in integration with the CT scanners of late, this technology has registered phenomenal growth. The small amount of radioactive material is called Radiotracers. Objective: Like 18 F-Fluro-deoxy-2-glucose has widely used. In this article, the author introduced clinical applications of PET out of 25 patients who studied hypermetabolic lesions in lymph nodes. Methods: PET imaging is coincidence imaging which is different from the other imaging technique PET image formed from multiple rings of detector crystals. Each decay positron travel in tissue annihila-tion reaction is going on. FDG is the most commonly used radiotracer to detect and stage various types of malignancies. Result: The field of PET/CT imaging cares for many oncology patients. PET improved localization of malignant lesions. It improved staging biopsy and therapy. Conclusion: Finally, studies to data showed 4% to 10% improvement in the overall accuracy of staging/restaging in lesions. If we use Monte Carlo simulation, OLINDA/EXM software may improve further with widely used.","PeriodicalId":61566,"journal":{"name":"核科学与技术国际期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70890311","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

Establishment of Local Diagnostic Reference Levels in Conventional Radiography: A Pilot Study in Dakar, Senegal 在传统放射照相中建立当地诊断参考水平:塞内加尔达喀尔的一项试点研究

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.121004

A. Diop, M. Diagne, N. Faye, M. Dieng

{"title":"Establishment of Local Diagnostic Reference Levels in Conventional Radiography: A Pilot Study in Dakar, Senegal","authors":"A. Diop, M. Diagne, N. Faye, M. Dieng","doi":"10.4236/wjnst.2022.121004","DOIUrl":"https://doi.org/10.4236/wjnst.2022.121004","url":null,"abstract":"Diagnostic Reference Levels (DRLs) are indicators that allow assessing the quality of equipment and procedures from the point of view of the doses delivered to patients and subsequently initiate corrective actions if necessary. The purpose of this study is to encourage health professionals to investigate patient radiation doses and to determine whether those doses comply with the principles of radiation protection in medical fields so as to improve practices by reducing patient exposure without reducing clinical effectiveness. To perform this work, we have investigated patient doses for different radiological examinations from six (6) medical centers in Dakar, including the following nine routine types: chest (PA), abdomen (AP), pelvis (AP), cervical spine (AP), lumbar spine (AP, Lat), hip (AP), thoracic spine (AP, Lat). Three types of data were collected, i.e., X-ray tube machine data, patient data and output measurements. The data were analyzed statistically and the median, minimum, maximum, and third quartile values were calculated and displayed throughout boxplots graphs for all exams and medical centers. The two sigma range (95% confidence interval) was also checked. Comparison of third quartiles of Entrance Surface Dose (ESD) and Dose Area Product (DAP) by type of examination with recommended international DRLs was performed. protection practices. The results show the need to develop protocols for dose measurement as well as to carry out quality assurance programs and dose optimization in Senegal.","PeriodicalId":61566,"journal":{"name":"核科学与技术国际期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70890087","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

Cause Analysis for Wall Thinning of Small-Bore Piping in Nuclear Power Plant by ToSPACE, FLUENT and Theoretical Evaluation 利用ToSPACE、FLUENT和理论评价分析核电厂小口径管道壁厚变薄的原因

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.123009

K. Hwang, Ilsu So, Hyukki Seo

引用次数: 0

Pseudocritical Rapid Energy Dissipation Analysis of Base-Load Electrical Demand Reduction on Nuclear Steam Supply System 核供汽系统基负荷电力需求降低的伪临界快速耗能分析

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.122007

Frederick Agyemang, S. Yamoah, S. K. Debrah

引用次数: 0

The Systematics Study of (n, p) Reaction Cross-Sections at 14.7 MeV Neutron Energy 14.7 MeV中子能量下(n, p)反应截面的系统研究

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.124010

Sadeem Abdulrahman Alsuhaibani, K. T. Osman

引用次数: 0

Measurement of Natural Radioactivity in Lagoon Sands Used in Construction in the District of Abidjan, Côte d’Ivoire 在阿比让地区用于建筑的泻湖砂中天然放射性的测量，Côte科特迪瓦

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.121005

Olkalé Jean-Claude Brigui, T. Dali, K. Djagouri, B. L. Gogon, S. Penabei, A. A. Koua, G. A. Monnehan

{"title":"Measurement of Natural Radioactivity in Lagoon Sands Used in Construction in the District of Abidjan, Côte d’Ivoire","authors":"Olkalé Jean-Claude Brigui, T. Dali, K. Djagouri, B. L. Gogon, S. Penabei, A. A. Koua, G. A. Monnehan","doi":"10.4236/wjnst.2022.121005","DOIUrl":"https://doi.org/10.4236/wjnst.2022.121005","url":null,"abstract":"Sand is an important natural material for the construction of houses, work buildings and other public spaces. This work, which is one of the first contributions to the environmental quality of construction materials, concerns the measurement of natural radioactivity in the lagoon sands collected in the district of Abidjan. Nineteen (19) samples of these sands are analyzed by gam-ma-ray spectrometry equipped with HPGe detector. The mean values obtained for 226 Ra, 232 Th and 40 K are respectively 7.76 ± 1.84 Bq·kg −1 , 5.21 ± 1.36 Bq·kg −1 , and 217.31 ± 5.03 Bq·kg −1 . The estimated average value of radium equivalent (Raeq) is 31.94 Bq·kg −1 . The results show that the average values obtained are far lower than the global limits of 35, 30, and 400 Bq·kg −1 for the concentrations of 226 Ra, 232 Th and 40 K, respectively, and 370 Bq·kg −1 for the equivalent radium established by the United Nations Scientiﬁc Committee on the Effects of Atomic Radiation (UNSCEAR). Therefore, the use of the analyzed lagoon sand samples in the different construction sectors should not cause serious radiological effects on the populations living in the District of Abidjan. Our results provide new data on building materials radioactivity in Côte d’Ivoire and all over the World. They can also be used as a reference for future work.","PeriodicalId":61566,"journal":{"name":"核科学与技术国际期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70890167","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

Analysis of Material Loss Behavior According to Long-Term Experiments on LDIE-FAC Multiple Degradation of Carbon Steel Materials 基于LDIE-FAC复合降解碳钢材料长期试验的材料损耗行为分析

核科学与技术国际期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/wjnst.2022.121001

K. Hwang, Dong Jin Lee, Hun Yun, S. Yoo, Ji Hyeon Kim

{"title":"Analysis of Material Loss Behavior According to Long-Term Experiments on LDIE-FAC Multiple Degradation of Carbon Steel Materials","authors":"K. Hwang, Dong Jin Lee, Hun Yun, S. Yoo, Ji Hyeon Kim","doi":"10.4236/wjnst.2022.121001","DOIUrl":"https://doi.org/10.4236/wjnst.2022.121001","url":null,"abstract":"Recently, damage caused by liquid droplet impingement erosion (LDIE) in addition to flow-accelerated corrosion (FAC) has frequently occurred in the secondary side steam piping of nuclear power plants, and the damage-occurring frequency is expected to increase as their operating years’ increase. In order to scrutinize its causes, therefore, an experimental study was conducted to understand how the behavior of LDIE-FAC multiple degradation changes when the piping of nuclear power plants is operated for a long time. Experimental results show that more magnetite was formed on the surface of the carbon steel specimen than on the low-alloy steel specimen, and that the rate of magnetite formation and extinction reached equilibrium due to the com-plex action of liquid droplet impingement erosion and flow-accelerated corrosion after a certain period of time. Furthermore, it was confirmed at the beginning of the experiment that A106 Gr.B specimen has more mass loss than A335 P22 specimen. After a certain period of time, however, the mass loss tends to be the opposite. This is presumed to have resulted from the magnetite formed on the surface playing a role in suppressing liquid droplet impingement erosion. In addition, it was confirmed that the amount of erosion linearly increases under the conditions in which the formation and extinction of magnetite reach equilibrium.","PeriodicalId":61566,"journal":{"name":"核科学与技术国际期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70890247","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: 3