Nuclear Science and Technology最新文献

Development of a Compact Digital Multichannel Analyzer based on FPGA 开发基于 FPGA 的紧凑型数字多通道分析仪

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.456

Hoai-Phuong Pham, Nhi-Dien Nguyen, Xuan Tan Nguyen, The-Dat Trang, Quang Dong Ong, K. Nguyen

引用次数: 0

Study on the repeatability and reproducibility of low-level radioactivity measurements using the analysis of variance tool 利用方差分析工具研究低放射性测量的重复性和再现性

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.446

Van Hoang Dao, M. Ho, Thi Thanh Nhan Doan, Van Hoai Nam Nguyen, V. Ho, Hoang Long Nguyen, Huu Loi Le, Quang Son Ong, Thi Thao Quyen Trinh

{"title":"Study on the repeatability and reproducibility of low-level radioactivity measurements using the analysis of variance tool","authors":"Van Hoang Dao, M. Ho, Thi Thanh Nhan Doan, Van Hoai Nam Nguyen, V. Ho, Hoang Long Nguyen, Huu Loi Le, Quang Son Ong, Thi Thao Quyen Trinh","doi":"10.53747/nst.v14i1.446","DOIUrl":"https://doi.org/10.53747/nst.v14i1.446","url":null,"abstract":"The repeatability and reproducibility need to be investigated to evaluate the stability of low-level radioactivity measurements with respect to an analysis method, as well as their dependence on measuring parameters. In this study, the procedures for gross alpha/beta and gamma-ray activity measurements were investigated in the Department of Radiation and Environment Safety at the Center for Nuclear Technologies (CNT). Moreover, an interlaboratory comparison was organized with other institutions, i.e. Dalat Nuclear Research Institute (DNRI), Institute for Nuclear Science and Technology (INST), and Institute of Public Health in HCM (IPH-HCM). To evaluate the repeatability and reproducibility of measures undertaken by the low-level radioactivity measurements, the certified reference materials (CRM), i.e. IAEA-CRM-385 (Natural and artificial radionuclides in sediment from the Irish Sea), NIST-SRM-4322c (Americium-241 Radioactivity Standard), and IAEA-CRM-RGK-1, together with 6 collected real samples were analyzed for 238U, 232Th, 226Ra, 228Ra, 210Pb and 40K. The analysis of variance (ANOVA) tool with respect to the average, standard deviation, F, p-value, and F-crit parameters was applied for the evaluation. The obtained results in the study revealed that the repeatability and reproducibility were stable for the low-level radioactivity measurements at the CNT which meets the laboratory’s quality management requirements.","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141679062","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

A study on the application of artificial neural network to predict k-eff and peaking factor of a small modular PWR 应用人工神经网络预测小型模块化压水堆 k-eff 和峰值系数的研究

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.413

Tran Chung Le, Thi Dung Nguyen, Viet Phu Tran

引用次数: 0

Study on column leaching process of rare earths from ion adsorption clays by ammonium sulfate 硫酸铵从离子吸附粘土中柱浸出稀土过程的研究

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.433

V. Nguyen, Ba Duy Bui, D. Cao, Thi Lien Nguyen, Xuan Dinh Luu

引用次数: 0

Evaluation and Comparison of AAA and AXB Dose Calculation Algorithms for Lung SBRT on TrueBeam STx with Eclipse 13.6 使用 Eclipse 13.6 的 TrueBeam STx 肺 SBRT 的 AAA 和 AXB 剂量计算算法评估与比较

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.465

Hong Lam Pham, Tien Dung Phan, Phuong Quy Vu, Quang Trung Pham

{"title":"Evaluation and Comparison of AAA and AXB Dose Calculation Algorithms for Lung SBRT on TrueBeam STx with Eclipse 13.6","authors":"Hong Lam Pham, Tien Dung Phan, Phuong Quy Vu, Quang Trung Pham","doi":"10.53747/nst.v14i1.465","DOIUrl":"https://doi.org/10.53747/nst.v14i1.465","url":null,"abstract":"This study aims to comprehensively evaluate and compare lung Stereotactic Body Radiation Therapy (SBRT) dose distribution using the Eclipse v13.6 treatment planning system and TrueBeam STx linac data, employing two dose calculation algorithms: Analytical Anisotropic Algorithm (AAA) and Acuros External Beam (AXB). Utilizing thirty-five 4DCT lung SBRT datasets, dose calculations were performed with both algorithms, maintaining consistent setup conditions except for the varied calculation algorithm. Evaluation criteria included tumor dose distribution Conformity Index (CI), Homogeneity Index (HI), Gradient Index (GI), D2cm, V105%, Dmax and organs-at-risk (OAR) doses, assessed via Dose Volume Histogram (DVH) analysis. Additionally, linac parameters such as Monitor Unit (MU) and Beam on Time (BoT) were analyzed. Both algorithms met dose criteria for tumors and OAR tolerance. Minor differences were observed in tumor distribution indices, with AXB's Gradient Index showing proximity to ideal values. Although AXB exhibited slightly higher OAR doses, differences were statistically insignificant. AXB also demonstrated reduced average MUs and BoT. This comparative analysis underscores the efficacy of both AAA and AXB algorithms in ensuring dose conformity and OAR tolerance in lung SBRT planning, with AXB potentially offering improvements in efficiency and patient safety.","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141679149","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

Thermoluminescence characteristics of in-house synthesized K2GdF5:Tb powder for photon and neutron 内部合成的 K2GdF5:Tb 粉末的光子和中子热致发光特性

Nuclear Science and Technology Pub Date : 2024-07-04 DOI: 10.53747/nst.v14i1.447

Van-Toan Phan, Van-Hung Nguyen, Van Dung Pham, Ngoc Thiem Le, Hung Thai Pham

引用次数: 0

Synthesis of conducting polymer by gamma Co-60 ray in aqueous solution 利用伽马钴 60 射线在水溶液中合成导电聚合物

Nuclear Science and Technology Pub Date : 2024-06-03 DOI: 10.53747/nst.v13i4.442

Xuan Vinh Le, Ba Vu Chinh Nguyen, Viet Cuong Phan, Tai Dai Vo, Ngoc Dat Trinh, Thanh Khan Dinh, Van Din Nguyen

引用次数: 0

Designing and fabricating a stationary magnetic particle system for Non-destructive testing 设计和制造用于无损检测的固定磁粉系统

Nuclear Science and Technology Pub Date : 2024-06-03 DOI: 10.53747/nst.v13i4.441

Duc Thinh Le, Duc Huyen Nguyen, Xuan Thao Nguyen, Thi Kieu Oanh Ngo, Thanh Tung Pham, Minh Duc Nguyen, Thanh Tung Duong

引用次数: 0

Synthesis of silver nanoparticles embedded on silica by gamma irradiation for utilization as antimicrobial agents 通过伽马辐照合成嵌入二氧化硅的银纳米粒子，以用作抗菌剂

Nuclear Science and Technology Pub Date : 2024-06-03 DOI: 10.53747/nst.v13i4.415

Lan Nguyen Thi Kim, Thuan Nguyen Chi, Duy Nguyen Ngoc

引用次数: 0

Simulation of natural convection flow for vertical heated rod by using ANSYS/Fluent 利用 ANSYS/Fluent 模拟垂直加热棒的自然对流

Nuclear Science and Technology Pub Date : 2024-06-03 DOI: 10.53747/nst.v13i4.453

Tung Duong Thanh, Tan Hung Hoang, Hoang Tuan Truong, Chi Thanh Tran, H. Kikura

{"title":"Simulation of natural convection flow for vertical heated rod by using ANSYS/Fluent","authors":"Tung Duong Thanh, Tan Hung Hoang, Hoang Tuan Truong, Chi Thanh Tran, H. Kikura","doi":"10.53747/nst.v13i4.453","DOIUrl":"https://doi.org/10.53747/nst.v13i4.453","url":null,"abstract":"The decay heat removal by natural convection is very important in case of Station blackout (SBO) of nuclear reactor. The computational fluid dynamic (CFD) is helpful to simulate the flow and temperature field. However, the CFD simulation models need to be validated by the experimental data. Thus, in this report, the Anslys/Fluent is applied to simulate the natural convection induced by single heater rod. The vertical heated rod with a diameter of 12 mm and a length of 225 mm is immersed at the center of a vertical pipe made of acrylic with a diameter of 146 mm and a height of 500 mm. In this simulation, the coupled scheme algorithm is also applied. Regarding to experimental method, the optical method such as Particle Image Velocimetry (PIV) was applied for 2-dimensional velocity distribution and pointwise temperature measurement. As a result, the predicted flow and temperature field are well agreed with experimental data. Accordingly, the thermal plumes are well estimated by ANSYS/Fluent, in which the buoyant plumes induced by different temperatures vertically go up along the heater rod's upper part until the container's isolated upper wall. The complicated flow occurs in the middle part of the container by mixing the downward flow on the top and the upward flow from the heater rod.","PeriodicalId":19445,"journal":{"name":"Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268907","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