Nukleonika最新文献_第7页

Source term estimation for the MARIA research reactor and model of atmospheric dispersion of radionuclides with dry deposition MARIA研究反应堆的源项估计和干沉降放射性核素大气扩散模型

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-07-06 DOI: 10.2478/nuka-2020-0028

M. Lipka

引用次数: 1

Fission chambers for space effect reduction in the application of the area method: A new approach 裂变室在空间效应减小中的应用:面积法的新途径

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-07-06 DOI: 10.2478/nuka-2020-0026

J. Janczyszyn, G. Domańska, P. Stanisz

引用次数: 2

Summer–winter contrast in carbon isotope and elemental composition of total suspended particulate matter in the urban atmosphere of Krakow, Southern Poland 波兰南部克拉科夫城市大气中总悬浮颗粒物的碳同位素和元素组成的夏冬季对比

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-07-06 DOI: 10.2478/nuka-2020-0029

M. Zimnoch, F. Morawski, T. Kuc, L. Samek, J. Bartyzel, Z. Gorczyca, A. Skiba, K. Różański

{"title":"Summer–winter contrast in carbon isotope and elemental composition of total suspended particulate matter in the urban atmosphere of Krakow, Southern Poland","authors":"M. Zimnoch, F. Morawski, T. Kuc, L. Samek, J. Bartyzel, Z. Gorczyca, A. Skiba, K. Różański","doi":"10.2478/nuka-2020-0029","DOIUrl":"https://doi.org/10.2478/nuka-2020-0029","url":null,"abstract":"Abstract The city of Krakow located in southern Poland ranks among the most polluted urban agglomerations in Europe. There are persisting controversies with respect to impact of different pollution sources operating in Krakow agglomeration on air quality within the city. The presented pilot study was aimed at exploring the possibilities offered by elemental and carbon isotope composition of total suspended particulate matter (TSPM) for better characterization of its sources in Krakow atmosphere. The analyses of carbon isotope composition of total carbon in the investigated TSPM samples were supplemented by parallel analyses of radiocarbon content in atmospheric carbon dioxide (CO2). This study revealed large seasonal variability of carbon isotope composition in the analysed TSPM samples. This large variability reflects seasonally varying contribution of different sources of fossil and modern carbon to the TSPM pool. The elemental composition of TSPM also reveals distinct seasonal variability of the analysed elements, reflecting varying mixture of natural and anthropogenic sources of those elements. A linear relationship between the fossil carbon load in the TSPM samples and the fossil carbon load in the atmospheric CO2 was found, pointing to the presence of additional source of anthropogenic carbonaceous particles not associated with burning of fossil fuels. Wearing of tyres and asphalt pavement is most probably the main source of such particles.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"181 - 191"},"PeriodicalIF":0.7,"publicationDate":"2020-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42753988","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: 7

Indoor and outdoor 222Rn and 220Rn and their progeny levels surrounding Bayan Obo mine, China 白云鄂博矿区室内外222Rn、220Rn及其子代水平

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0023

Nanping Wang, Miao Hu, Weihua Zeng, Cong Yu, Binlin Jia, Zhijie Yang

{"title":"Indoor and outdoor 222Rn and 220Rn and their progeny levels surrounding Bayan Obo mine, China","authors":"Nanping Wang, Miao Hu, Weihua Zeng, Cong Yu, Binlin Jia, Zhijie Yang","doi":"10.2478/nuka-2020-0023","DOIUrl":"https://doi.org/10.2478/nuka-2020-0023","url":null,"abstract":"Abstract More than half of the total natural ionizing radiation dose received by the human population is caused by radon and thoron (Rn and Tn) and their progeny. To estimate the level of radiation due to radon and thoron and their progeny, an investigation was conducted in a residential area near the world’s largest open-pit mine of Bayan Obo in Inner Mongolia, China. The concentration of Rn, Tn, and their decay products in air and soil were studied by using AlphaGUARD, RAD7, and ERS-RDM-2S for a discrete period of time in three different locations. The average indoor concentration of radon and thoron was 62.6 ± 44.6 Bq/m3 and 108.3 ± 94.5 Bq/m3 respectively, and the outdoor concentration was 12.9 ± 6.3 Bq/m3 and 55.8 ± 18.5 Bq/m3, respectively. Relatively high concentrations were recorded in the area near to the mine, with a significant increasing trend observed in indoor thoron concentration. A prominent hotspot in thoron concentration was found in a single-story house with values 747 ± 150 Bq/m3. The equilibrium equivalent thoron concentration (EECTn) varies from 0.48 Bq/m3 to 2.36 Bq/m3 with an arithmetic mean of 1.37 ± 0.64 Bq/m3, and comparatively higher than EECRn. Concluding that the mining activity at Bayan Obo mine is significantly increasing the level of indoor thoron and its progeny in surroundings. It is suggested to further systematically investigate the indoor Rn and Tn progeny concentrations in the residential dwellings of the Bayan Obo mining area, and 232Th content of the building materials, to provide a basis for calculating the radiation dose.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"145 - 148"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43000981","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: 1

Using a scale model room to assess the contribution of building material of volcanic origin to indoor radon 使用比例模型室评估火山成因建筑材料对室内氡的贡献

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0010

C. Lucchetti, M. Castelluccio, M. Altamore, A. Briganti, G. Galli, M. Soligo, P. Tuccimei, M. Voltaggio

{"title":"Using a scale model room to assess the contribution of building material of volcanic origin to indoor radon","authors":"C. Lucchetti, M. Castelluccio, M. Altamore, A. Briganti, G. Galli, M. Soligo, P. Tuccimei, M. Voltaggio","doi":"10.2478/nuka-2020-0010","DOIUrl":"https://doi.org/10.2478/nuka-2020-0010","url":null,"abstract":"Abstract In the frame of Radon rEal time monitoring System and Proactive Indoor Remediation (RESPIRE), a LIFE 2016 project funded by the European Commission, the contribution of building materials of volcanic origin to indoor radon concentration was investigated. First, total gamma radiation and related outdoor dose rates of geological materials in the Caprarola area (Central Italy) were measured to define main sources of radiation. Second, 222Rn and 220Rn exhalation rates of these rocks used as building materials were measured using an accumulation chamber connected in a closed loop with a RAD7 radon monitor. Among others, the very porous “Tufo di Gallese” ignimbrite provided the highest values. This material was then used to construct a scale model room of 62 cm × 50 cm × 35 cm (inner length × width × height, respectively) to assess experimental radon and thoron activity concentration at equilibrium and study the effects of climatic conditions and different coatings on radon levels. A first test was carried out at ambient temperature to determine experimental 222Rn and 220Rn equilibrium activities in the model room, not covered with plaster or other coating materials. Experimental 222Rn equilibrium was recorded in just two days demonstrating that the room “breaths”, exchanging air with the outdoor environment. This determines a dilution of indoor radon concentration. Other experiments showed that inner covers (such as plasterboard and different kinds of paints) partially influence 222Rn but entirely cut the short-lived 220Rn. Finally, decreases in ambient temperature reduce radon exhalation from building material and, in turn, indoor activity concentration.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"71 - 76"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48142551","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: 6

214Bi/214Pb radioactivity ratio three-year monitoring in rainwater in Prague 布拉格雨水的214Bi/214Pb放射性比三年监测

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0018

F. Ambrosino, L. Thinová, M. Hýža, C. Sabbarese

引用次数: 19

A new geostatistical tool for the analysis of the geographical variability of the indoor radon activity 一种新的用于分析室内氡活动的地理变异的地质统计学工具

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0015

F. Loffredo, A. Scala, G. M. Adinolfi, F. Savino, M. Quarto

{"title":"A new geostatistical tool for the analysis of the geographical variability of the indoor radon activity","authors":"F. Loffredo, A. Scala, G. M. Adinolfi, F. Savino, M. Quarto","doi":"10.2478/nuka-2020-0015","DOIUrl":"https://doi.org/10.2478/nuka-2020-0015","url":null,"abstract":"Abstract The population is continuously exposed to a background level of ionizing radiation due to the natural radioactivity and, in particular, with radon (222Rn). Radon gas has been classified as the second leading cause of lung cancer after tobacco smoke [1]. In the confined environment, radon concentration can reach harmful level and vary accordingly to many factors. Since the primary source of radon in dwellings is the subsurface, the risk assessment and reduction cannot disregard the identification of the local geology and the environmental predisposing factors. In this article, we propose a new methodology, based on the computation of the Gini coefficients at different spatial scales, to estimate the spatial correlation and the geographical variability of radon concentrations. This variability can be interpreted as a signature of the different subsurface geological conditions. The Gini coefficient computation is a statistical tool widely used to determine the degree of inhomogeneity of different kinds of distributions. We generated several simulated radon distributions, and the proposed tool has been validated by comparing the variograms based on the semi-variance computation with those ones based on the Gini coefficient. The Gini coefficient variogram is shown to be a good estimator of the inhomogeneity degree of radon concentration. Indeed, it allows to better constrain the critical distance below which the radon geological source can be considered as uniform at least for the investigated length scales of variability; it also better discriminates the fluctuations due to the environmental predisposing factors from those ones due to the random spatially uncorrelated noise.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"104 - 99"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48789097","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: 12

Exposures from radon, thoron, and thoron progeny in high background radiation area in Takandeang, Mamuju, Indonesia 印度尼西亚马木朱省Takandeang高本底辐射区氡、氡和氡子代的暴露

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0013

Miki Arian Saputra, Eka Djatnika Nugraha, Tri Purwanti, Rokhmat Arifianto, Roza Indra Laksmana, R. P. Hutabarat, M. Hosoda, S. Tokonami

{"title":"Exposures from radon, thoron, and thoron progeny in high background radiation area in Takandeang, Mamuju, Indonesia","authors":"Miki Arian Saputra, Eka Djatnika Nugraha, Tri Purwanti, Rokhmat Arifianto, Roza Indra Laksmana, R. P. Hutabarat, M. Hosoda, S. Tokonami","doi":"10.2478/nuka-2020-0013","DOIUrl":"https://doi.org/10.2478/nuka-2020-0013","url":null,"abstract":"Abstract The exposure from radon, thoron, and thoron progeny was measured for 45 dwellings in high background radiation area in Takandeang, Indonesia with ambient dose equivalent rate ranging from 0.34 μSv h−1 to 1.90 μSv h−1. The measurement was taken using passive radon and thoron discriminative detector and thoron progeny detector. This measurement was taken from November 2018 to October 2019, and within one month the detector would be replaced with a new detector. The concentrations of radon, thoron, and thoron progeny were calculated as 42–490 Bq m−3, 20–618 Bq m−3, and 4–40 Bq m−3, respectively. The concentrations for outdoor were 49–435 Bq m−3, 23–457 Bq m−3, and 4–37 Bq m−3, respectively, and the annual effective dose was 9.8–28.6 mSv y−1. Based on the result of Spearman’s correlations analysis between the indoor radon and thoron concentrations and between the indoor thoron progeny and thoron concentrations, we suggest that exposure to thoron cannot be predicted from exposure to radon, and the equilibrium equivalent thoron concentration has a large uncertainty when it is estimated from thoron concentration assuming a single thoron equilibrium factor.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"89 - 94"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43061920","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: 15

Seasonal variation of radon and CO2 in the Važecká Cave, Slovakia 斯洛伐克Važecká洞穴中氡和CO2的季节变化

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0025

I. Smetanová, K. Holý, Ľubica Luhová, K. Csicsay, Dagmar Haviarová, L. Kunáková

引用次数: 9

Radon intercomparison tests – Katowice, 2016 氡相互比较试验——卡托维兹，2016年

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0020

S. Chałupnik, K. Skubacz, M. Wysocka, J. Mazur, M. Bonczyk, K. Kozak, D. Grządziel, P. Urban, D. Tchorz-Trzeciakiewicz, B. Kozłowska, A. Walencik-Łata, A. Podstawczyńska, J. Olszewski, J. Bartak, M. Karpińska, K. Wołoszczuk, M. Dohojda, J. Nowak, M. Długosz-Lisiecka, E. Foerster, T. Przylibski

{"title":"Radon intercomparison tests – Katowice, 2016","authors":"S. Chałupnik, K. Skubacz, M. Wysocka, J. Mazur, M. Bonczyk, K. Kozak, D. Grządziel, P. Urban, D. Tchorz-Trzeciakiewicz, B. Kozłowska, A. Walencik-Łata, A. Podstawczyńska, J. Olszewski, J. Bartak, M. Karpińska, K. Wołoszczuk, M. Dohojda, J. Nowak, M. Długosz-Lisiecka, E. Foerster, T. Przylibski","doi":"10.2478/nuka-2020-0020","DOIUrl":"https://doi.org/10.2478/nuka-2020-0020","url":null,"abstract":"Abstract At the beginning of the year 2016, the representatives of the Polish Radon Centre decided to organize proficiency tests (PTs) for measurements of radon gas and radon decay products in the air, involving radon monitors and laboratory passive techniques. The Silesian Centre for Environmental Radioactivity of the Central Mining Institute (GIG), Katowice, became responsible for the organization of the PT exercises. The main reason to choose that location was the radon chamber in GIG with a volume of 17 m3, the biggest one in Poland. Accordingly, 13 participants from Poland plus one participant from Germany expressed their interest. The participants were invited to inform the organizers about what types of monitors and methods they would like to check during the tests. On this basis, the GIG team prepared the proposal for the schedule of exercises, such as the required level(s) of radon concentrations, the number and periods of tests, proposed potential alpha energy concentration (PAEC) levels and also the overall period of PT. The PT activity was performed between 6th and 17th June 2016. After assessment of the results, the agreement between radon monitors and other measurement methods was confirmed. In the case of PAEC monitors and methods of measurements, the results of PT exercises were consistent and confirmed the accuracy of the calibration procedures used by the participants. The results of the PAEC PTs will be published elsewhere; in this paper, only the results of radon intercomparison are described.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"127 - 132"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45020732","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: 3