Nukleonika最新文献_第9页

Radon variability due to floor level in two typical residential buildings in Serbia 塞尔维亚两栋典型住宅的氡变化与楼层水平有关

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-05-29 DOI: 10.2478/nuka-2020-0019

V. Udovičić, N. Veselinović, D. Maletic, R. Banjanac, A. Dragic, D. Joković, M. Savic, D. Knežević, M. E. Savković

{"title":"Radon variability due to floor level in two typical residential buildings in Serbia","authors":"V. Udovičić, N. Veselinović, D. Maletic, R. Banjanac, A. Dragic, D. Joković, M. Savic, D. Knežević, M. E. Savković","doi":"10.2478/nuka-2020-0019","DOIUrl":"https://doi.org/10.2478/nuka-2020-0019","url":null,"abstract":"Abstract It is well known that one of the factors that influence the indoor radon variability is the floor level of the buildings. Considering the fact that the main source of indoor radon is radon in soil gas, it is expected that the radon concentration decreases at higher floors. Thus at higher floors the dominant source of radon is originating from building materials, and in some cases there may be deviations from the generally established regularity. In such sense, we chose one freestanding single-family house with loft and other 16-floor high-rise residential building for this study. The indoor radon measurements were performed by two methods: passive and active. We used passive devices based on track-etched detectors: Radtrak2 Radonova. For the short-term indoor radon measurements, we used two active devices: SN1029 and SN1030 (manufactured by Sun Nuclear Corporation). The first device was fixed in the living room at the ground level and the second was moved through the floors of the residential building. Every measuring cycle at the specified floor lasted seven days with the sampling time of 2 h. The results show two different indoor radon behaviours regarding radon variability due to floor level. In the single-family house with loft we registered intense difference between radon concentration in the ground level and loft, while in the high-rise residential building the radon level was almost the same at all floors, and hence we may conclude that radon originated mainly from building materials.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"121 - 125"},"PeriodicalIF":0.7,"publicationDate":"2020-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44045584","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

Remarks to history of radon activity concentration metrology 氡气活度浓度计量历史评述

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0006

P. Otáhal, I. Burian

引用次数: 2

Evolution of treatment planning and dose delivery methods during radiotherapy for patients undergoing bone marrow transplantation: a review 骨髓移植患者放疗期间治疗计划和剂量输送方法的演变：综述

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0003

J. Litoborska, T. Piotrowski, A. Jodda, J. Malicki

{"title":"Evolution of treatment planning and dose delivery methods during radiotherapy for patients undergoing bone marrow transplantation: a review","authors":"J. Litoborska, T. Piotrowski, A. Jodda, J. Malicki","doi":"10.2478/nuka-2020-0003","DOIUrl":"https://doi.org/10.2478/nuka-2020-0003","url":null,"abstract":"Abstract Background and objectives: This study describes the treatment planning and dose delivery methods of radiotherapy for patients undergoing bone marrow transplantation. The analysis was carried out in the context of the evolution of these methods over the last 60 years. Materials and methods: A systematic literature search was carried out using the PubMed search engine. Overall, 90 relevant studies were included: 24 general studies, 10 describing isotopes usage, 24 related to conventional and 32 to advanced methods. Results: The analysis of the evolution of radiotherapy methods shows how significantly the precision of dose planning methods and its delivery have changed. The atypical positioning caused by geometrical requirements for applications of isotopes or conventional techniques has been replaced by positioning on a therapeutic couch, which allows a more precise setup of the patient that is necessary for an exact delivery of the planned dose. The dose can be fully optimized and calculated on tomographic images by algorithms implemented in planning systems. Optimization process allows to reduce doses in organs at risk. The accuracy between planned and delivered doses can be checked by pretreatment verification methods, and the patient positioning can be checked by image guidance procedures. Interpretation and conclusions: Current radiotherapy solutions allow a precise delivery of doses to the planning target volume while reducing doses to organs at risk. Nevertheless, it should be kept in mind that establishing radiotherapy as an important element of the whole therapeutic regimen resulted from the follow-up of patients treated by conventional techniques. To confirm the clinical value of new advanced techniques, clinical trials are required.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"19 - 30"},"PeriodicalIF":0.7,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46996805","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: 5

Efficiency calculation and comparison of fluidic and solid-body power sources using corpuscular radiation 利用微粒辐射的流体与固体电源的效率计算与比较

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0004

T. Miś

引用次数: 0

Radiation-induced cancer risk and decision-making in a simulated Cs-137 urban event 模拟Cs-137城市事件中辐射诱导的癌症风险和决策

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0005

E. Andrade, R. G. Gomes, R. Stenders, T. Brum, Sergio X. Lima, Mariana S. C. Castro, A. Silva

{"title":"Radiation-induced cancer risk and decision-making in a simulated Cs-137 urban event","authors":"E. Andrade, R. G. Gomes, R. Stenders, T. Brum, Sergio X. Lima, Mariana S. C. Castro, A. Silva","doi":"10.2478/nuka-2020-0005","DOIUrl":"https://doi.org/10.2478/nuka-2020-0005","url":null,"abstract":"Abstract The triggering of a “dirty bomb” generates a complex scenario, with enormous challenges for the responders due to initial misinformation and the urgency to act quickly yet effectively. Normally, the first 100 h are decisive for perceiving the risk in a more realistic dimension, but the support of methodologies that rely on computational simulations can be valuable when making key decisions. This work seeks to provide support for the early decision-making process by using a Gaussian model for the distribution of a quantity of Cs-137 spread by a radiological dispersive device (RDD). By sequentially joining two independent programs, HotSpot Health Physics codes and RESidual RADiation (RESRAD)-RDD family of codes, we came up with results that suggest a segmented approach to the potentially affected population. These results advocate that (a) the atmospheric stability conditions represented by the Pasquill–Gifford classes and (b) the population subgroups defined by radiation exposure conditions strongly influence the postdetonation radiological effects. These variables should be taken into account in the elaboration of flexible strategies that include many climatic conditions and to priori-tize attention to different groups of public at risk. During the initial phases of such an event, it is believed that simulations using Gaussian models may be of value in anticipating the possible changes in key variables during the decision-making process. These variables may severely affect the effectiveness of the actions of responders and the general public’s safety.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"65 1","pages":"37 - 43"},"PeriodicalIF":0.7,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41614836","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: 5

Fluka simulation of PGNAA system for determining heavy metal pollution in the soil sample PGNAA系统测定土壤重金属污染的Fluka模拟

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0002

Can Zhang, Jianbo Yang, Rui Li, Yujie Qiao, Xu Zhang, Jie Xu

引用次数: 1

Crystalline structures of Rb2UBr6 ionic conductor determined by neutron diffraction 用中子衍射法测定Rb2UBr6离子导体的晶体结构

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-03-01 DOI: 10.2478/nuka-2020-0001

K. Małetka, E. Ressouche, Håkan Rundlőf, R. Tellgren, W. Szczepaniak, M. Zabłocka-Malicka

引用次数: 0

Quality assurance in radon SSNTD measurements : PHE experience 氡SSNTD测量的质量保证:PHE经验

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2020-01-01 DOI: 10.2478/NUKA-2020-0016

J. Wasikiewicz

引用次数: 1

The effects of fuel type on control rod reactivity of pebble-bed reactor 燃料类型对球床堆控制棒反应性的影响

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2019-12-01 DOI: 10.2478/nuka-2019-0017

Zuhair, Suwoto, T. Setiadipura, J. C. Kuijper

{"title":"The effects of fuel type on control rod reactivity of pebble-bed reactor","authors":"Zuhair, Suwoto, T. Setiadipura, J. C. Kuijper","doi":"10.2478/nuka-2019-0017","DOIUrl":"https://doi.org/10.2478/nuka-2019-0017","url":null,"abstract":"Abstract As a crucial core physics parameter, the control rod reactivity has to be predicted for the control and safety of the reactor. This paper studies the control rod reactivity calculation of the pebble-bed reactor with three scenarios of UO2, (Th,U)O2, and PuO2 fuel type without any modifications in the configuration of the reactor core. The reactor geometry of HTR-10 was selected for the reactor model. The entire calculation of control rod reactivity was done using the MCNP6 code with ENDF/B-VII library. The calculation results show that the total reactivity worth of control rods in UO2-, (U,Th)O2-, and PuO2-fueled cores is 15.87, 15.25, and 14.33%Δk/k, respectively. These results prove that the effectiveness of total control rod in thorium and uranium cores is almost similar to but higher than that in plutonium cores. The highest reactivity worth of individual control rod in uranium, thorium and plutonium cores is 1.64, 1.44, and 1.53%Δk/k corresponding to CR8, CR1, and CR5, respectively. The other results demonstrate that the reactor can be safely shutdown with the control rods combination of CR3+CR5+CR8+CR10, CR2+CR3+CR7+CR8, and CR1+CR3+CR6+CR8 in UO2-, (U,Th)O2-, and PuO2-fueled cores, respectively. It can be concluded that, even though the calculation results are not so much different, however, the selection of control rods should be considered in the pebble-bed core design with different scenarios of fuel type.","PeriodicalId":19467,"journal":{"name":"Nukleonika","volume":"64 1","pages":"131 - 138"},"PeriodicalIF":0.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45442341","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: 10

Study on irradiated D-mannose isolated from cranberry 辐照蔓越莓中D-甘露糖的分离研究

IF 0.7 4区物理与天体物理

Nukleonika Pub Date : 2019-12-01 DOI: 10.2478/nuka-2019-0018

G. Guzik, W. Stachowicz, J. Michalik

引用次数: 0