Nukleonika最新文献

Professor W. Alexander Van Hook (1936-2023) 亚历山大-范-胡克教授（1936-2023）

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2024-02-23 DOI: 10.2478/nuka-2024-0004

Andrzej G. Chmielewski

引用次数: 0

Comparison of the neutronic properties of the (Th-233U)O2, (Th-233U)C, and (Th-233U)N fuels in small long-life PWR cores with 300, 400, and 500 MWth of power 功率为 300、400 和 500 MWth 的小型长寿命压水堆堆芯中 (Th-233U)O2、(Th-233U)C 和 (Th-233U)N 燃料的中子特性比较

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2024-02-23 DOI: 10.2478/nuka-2024-0001

B. P. Lapanporo, Z. Su’ud, A. P. A. Mustari

{"title":"Comparison of the neutronic properties of the (Th-233U)O2, (Th-233U)C, and (Th-233U)N fuels in small long-life PWR cores with 300, 400, and 500 MWth of power","authors":"B. P. Lapanporo, Z. Su’ud, A. P. A. Mustari","doi":"10.2478/nuka-2024-0001","DOIUrl":"https://doi.org/10.2478/nuka-2024-0001","url":null,"abstract":"\u0000 The neutronic characteristics of (Th-233U)O2, (Th-233U)C, and (Th-233U)N have been compared in small long-life pressurized water reactors (PWRs). Neutronic calculations were carried out at 300 MWth, 400 MWth, and 500 MWth with two cladding types: zircaloy-4 and ZIRLO (Zr low oxygen). They were performed using the Standard Reactor Analysis Code (SRAC) and JENDL-4.0 nuclide data, dividing the reactor core into three fuel zones with varying 233U enrichment levels, ranging from 3% to 9% and fluctuating by 1%, employing the PIJ module at the fuel cell level and the CITATION module at the reactor core level. In addition, 231Pa was added as burnable poison (BP). The (Th-233U)N fuel demonstrated superior criticality compared to the other fuel types, as it consistently achieves critical conditions throughout the reactor’s operating cycle with excess reactivity <1.00% dk/k for several fuel configurations at the 300 MWth and 400 MWth power levels. Moreover, the (Th-233U)N and (Th-233U)C fuels exhibited similar and flatter power density distribution patterns compared to the (Th-233U)O2 fuel. The power peaking factor (PPF) value was relatively higher for (Th-233U)O2 fuel than the other two fuels. The (Th-233U)N fuel exhibited the most negative Doppler coefficient, followed by (Th-233U)C and (Th-233U)O2 fuels. Analysis of burnup levels revealed that the (Th-233U)O2 fuel achieved significantly higher burnup than the other two fuels.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140435824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gamma radiation shielding properties of (x)Bi2O3–(0.5 – x)ZnO–0.2B2O3–0.3SiO2 glass system (x)Bi2O3-(0.5 - x)ZnO-0.2B2O3-0.3SiO2 玻璃体系的伽马辐射屏蔽性能

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2024-02-23 DOI: 10.2478/nuka-2024-0003

Bonginkosi Vincent Kheswa

{"title":"Gamma radiation shielding properties of (x)Bi2O3–(0.5 – x)ZnO–0.2B2O3–0.3SiO2 glass system","authors":"Bonginkosi Vincent Kheswa","doi":"10.2478/nuka-2024-0003","DOIUrl":"https://doi.org/10.2478/nuka-2024-0003","url":null,"abstract":"\u0000 Lead (Pb)-based materials are very effective in radiation shielding due to their high density of Pb. However, they pose health risks to humans because of the toxicity of lead. As a result, the investigation of radiation shielding properties of various lead-free glass materials has drawn a lot of attention from researchers. In this work, the γ radiation competence of the Bi2O3–ZnO–B2O3–SiO2 glass network was investigated, for the first time in the 0.015–15 MeV energy range, using Phy-X/PSD and XCOM software systems. The results showed that 45Bi2O3–5ZnO–20B2O3–30SiO2 glass sample has the highest linear attenuation coefficient, mass attenuation coefficient, and effective atomic number, and it has the lowest half-value layer, tenth-value layer, and mean-free path. Therefore, 45Bi2O3–5ZnO–20B2O3–30SiO sample is more effective on γ ray shielding than 10Bi2O3–40ZnO–20B2O3–30SiO, 20Bi2O3–30ZnO–20B2O3–30SiO, 30Bi2O3–20ZnO–20B2O3–30SiO, and 40Bi2O3–10ZnO–20B2O3–30SiO samples. The comparison of the results with the literature also revealed that the 45Bi2O3–5ZnO–20B2O3–30SiO glass sample is even more effective than some of Bi2O3-based glass systems, which were recently developed in the literature, by at least a factor of 2.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139957662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

No evidence of the long-term in vitro toxicity of Aeroxide P25 TiO2 nanoparticles in three mammalian cell lines despite the initial reduction of cellular mitochondrial activity 尽管最初降低了细胞线粒体活性，但没有证据表明 Aeroxide P25 TiO2 纳米粒子对三种哺乳动物细胞系具有长期体外毒性

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2024-02-23 DOI: 10.2478/nuka-2024-0002

S. Męczyńska-Wielgosz, T. Bartłomiejczyk, I. Grądzka, Sylwester Sommer, Aneta Węgierek-Ciuk, A. Lankoff, Katarzyna Sikorska, M. Wojewódzka, Małgorzata M Dobrzyńska, Marcin Kruszewski

{"title":"No evidence of the long-term in vitro toxicity of Aeroxide P25 TiO2 nanoparticles in three mammalian cell lines despite the initial reduction of cellular mitochondrial activity","authors":"S. Męczyńska-Wielgosz, T. Bartłomiejczyk, I. Grądzka, Sylwester Sommer, Aneta Węgierek-Ciuk, A. Lankoff, Katarzyna Sikorska, M. Wojewódzka, Małgorzata M Dobrzyńska, Marcin Kruszewski","doi":"10.2478/nuka-2024-0002","DOIUrl":"https://doi.org/10.2478/nuka-2024-0002","url":null,"abstract":"\u0000 We studied the effects of Aeroxide P25 titanium dioxide nanoparticles (TiO2 NPs) with a diameter of 21 nm on induction of DNA damage and long-term survival of three human cell lines: hepatocellular liver carcinoma HepG2, colorectal adenocarcinoma HT29 and lung carcinoma A549. The endpoints examined were DNA breakage estimated by the comet assay and oxidative base damage recognized by formamide-pyrimidine glycosylase (FPG) estimated with the FPG+ comet assay, frequencies of histone γH2AX foci and micronuclei, apoptosis, cell metabolic activity measured by mitochondrial activity (MTT) assay and long-term survival measured by colony-forming ability. Each cell line had a different pattern of DNA breakage and base damage vs. nanoparticle (NP) concentration and treatment time. There was no increase in the frequencies of histone γH2AX foci and micronuclei as compared to those in the untreated cells. In parallel with these results, no induction of apoptosis has been found in none of the cell lines tested. The reported experiments provided no evidence of the long-term in vitro toxicity of Aeroxide P25 TiO2 NPs, despite a slight decrease in mitochondrial activity and cell survival during the first 72 h.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140435346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical studies of plasma edge in W7-X with 3D FINDIF code W7-X等离子体边缘的三维FINDIF数值研究

4区物理与天体物理

Nukleonika Pub Date : 2023-10-06 DOI: 10.2478/nuka-2023-0011

Małgorzata Jabłczyńska, Grzegorz Pełka, Marcin Jakubowski, Marcin Ślęczka

{"title":"Numerical studies of plasma edge in W7-X with 3D FINDIF code","authors":"Małgorzata Jabłczyńska, Grzegorz Pełka, Marcin Jakubowski, Marcin Ślęczka","doi":"10.2478/nuka-2023-0011","DOIUrl":"https://doi.org/10.2478/nuka-2023-0011","url":null,"abstract":"Abstract Modelling of the plasma transport for inherently three-dimensional (3D) problems as in stellarators requires dedicated complex codes. FINDIF is a 3D multifluid plasma edge transport code that has been previously successfully used for the analysis of energy transport in the TEXTOR-DED tokamak [1], where 3D perturbations led to an ergodic structure of field lines in the plasma edge. The ongoing efforts to apply it meaningfully to Wendelstein 7-X (W7-X) plasma problems resulted in advancements in the main model and accompanying tools for mesh generation and post-processing. In order to verify the applicability of the code and to compare with the reported simulation (EMC3-EIRENE) and experimental (OP1.1) results, a series of simulations for varying plasma density, temperature and anomalous transport coefficients as well as for fixed input power were performed. The connection length pattern of FINDIF traced magnetic field lines on the limiter was reproduced and its impact on heat loads was confirmed. An increase in the peak heat load on the limiter with a rise in plasma density, temperature and anomalous plasma transport coefficients was observed. The decay lengths of density, electron temperature and heat flux did not change with density, and were decreasing with temperature and increasing with anomalous plasma transport coefficient, which was compared to the simple scrape-off layer (SOL) model.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135351993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photomultiplier tube signal conditioning for high-temperature applications 用于高温应用的光电倍增管信号调理

4区物理与天体物理

Nukleonika Pub Date : 2023-10-06 DOI: 10.2478/nuka-2023-0012

Kacper Zezuliński, Andrzej Broslawski, Ivan Slipukhin, Zbigniew Guzik, Tomasz Krakowski, Szymon Burakowski, Łukasz Kaźmierczak, Grzegorz Łubian, Piotr Milewski, Gabriela Saworska, Krystian Trela

引用次数: 0

Mechanical design of the gamma blockers for the high-energy beam transport region of the European Spallation Source 欧洲散裂源高能束流输运区伽马阻滞剂的机械设计

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-07-05 DOI: 10.2478/nuka-2023-0010

M. Wojciechowski, Karol S. Szymczyk, S. Wronka

引用次数: 0

Computer-simulated degradation of CF3Cl, CF2Cl2, and CFCl3 under electron beam irradiation 电子束辐照下CF3Cl、CF2Cl2和CFCl3的计算机模拟降解

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-07-05 DOI: 10.2478/nuka-2023-0009

Stephen O Kabasa, Yongxia Sun, A. Chmielewski, H. Nichipor

{"title":"Computer-simulated degradation of CF3Cl, CF2Cl2, and CFCl3 under electron beam irradiation","authors":"Stephen O Kabasa, Yongxia Sun, A. Chmielewski, H. Nichipor","doi":"10.2478/nuka-2023-0009","DOIUrl":"https://doi.org/10.2478/nuka-2023-0009","url":null,"abstract":"Abstract Electron beam treatment technologies should be versatile in the removal of chlorofluorocarbons (CFCs) owing to their exceptional cross sections for the thermal electrons generated in the radiolysis of air. Humidity, dose rates, O2 concentration, and CFC concentration influence the efficiency of the destruction process under electron beam treatment. Computer simulations have been used to theoretically demonstrate the destruction of chlorotrifluoromethane (CF3Cl), dichlorodifluoromethane (CF2Cl2), and trichlorofluoromethane (CFCl3) in the air (N2 + O2: 80% + 20%) in room temperature up to a dose of 13 kGy. Under these conditions, it is predicted that the removal efficiency is in the order CF3Cl (0.1%) < CF2Cl2 (7%) < CFCl3 (34%), which shows the dependence of the process on the number of substituted Cl atoms. Dissociative electron attachment with the release of Cl– is the primary process initiating the destruction of CFCs from the air stream. Reactions with the first excited state of oxygen, namely, O(1D), and charge-transfer reactions further promote the degradation process. The degradation products can be further degraded to CO2, Cl2, and F2 by prolonged radiation treatment. Other predicted products can also be removed through chemical processes.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43355205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radon exposure in kindergartens in one Bulgarian district 保加利亚一个地区幼儿园的氡暴露情况

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-04-25 DOI: 10.2478/nuka-2023-0007

A. Angelova, N. Chobanova, B. Kunovska, D. Djunakova, K. Ivanova, Z. Stojanovska

引用次数: 0

Study of a Compton backscattering wall defects detection device using the Monte Carlo method 康普顿背散射壁缺陷检测装置的蒙特卡罗方法研究

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2023-04-25 DOI: 10.2478/nuka-2023-0008

X. Qin, Jianbo Yang, Zheng Du, Jie Xu, Rui Li, Hui Li, QI Liu

{"title":"Study of a Compton backscattering wall defects detection device using the Monte Carlo method","authors":"X. Qin, Jianbo Yang, Zheng Du, Jie Xu, Rui Li, Hui Li, QI Liu","doi":"10.2478/nuka-2023-0008","DOIUrl":"https://doi.org/10.2478/nuka-2023-0008","url":null,"abstract":"Abstract In view of the shortcomings of traditional wall defect detection methods, such as small detection range, poor accuracy, non-portable device, and so on, a wall defects detection device based on Compton backscattering technology is designed by Monte Carlo method, which is mainly used to detect the size and location information of defects in concrete walls. It mainly consists of two parts, the source container and the detection system: first, through the simulation and analysis of the parameters such as the receiving angle of the backscattered particles and the rear collimating material of the detector, the influence of the fluorescent X-ray peak of the detector collimating material on the backscattered particle counts is eliminated and the detected error is reduced; second, the ring array detector design, compared with single array detector and surface array detector, can facilitate real-time detection of defect orientation, expanding the single scan range and improving the detection efficiency. After simulation and comparative analysis, the relevant optimal parameters are obtained: the object is detected using a Cs-137 γ-ray source with an activity of 6 mCi, and a ring detector consisting of four 0.5-inch cube-shaped CsI scintillator detectors is placed at 150° to receive the backscattered photons. The simulation analysis using the Monte Carlo FLUKA program showed that the maximum depth of wall defect detection is 8 cm, the maximum error fluctuation range of defect depth and thickness is ±1 cm, the overall device weight is <20 kg, and the measurement time is <5 min.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47609724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0