Journal of environmental radioactivity最新文献

{"title":"Similarity principle of particulate dispersion between wind tunnel and atmospheric boundary layer: A combined theoretical and experimental study","authors":"Deyi Chen ,&nbsp;Xiuhuan Tang ,&nbsp;Longbo Liu ,&nbsp;Wenshui Chen ,&nbsp;Baojie Nie ,&nbsp;Zhiming Li ,&nbsp;Dezhong Wang","doi":"10.1016/j.jenvrad.2026.107916","DOIUrl":"10.1016/j.jenvrad.2026.107916","url":null,"abstract":"<div><div>Understanding the dispersion behaviors of radioactive particles in the atmospheric boundary layer is critical for assessing their environmental impact from nuclear facility emissions. Wind tunnels have been extensively employed to investigate wind field characteristics and atmospheric dispersion behavior of particles based on scaled similarity principles. Nevertheless, quantitative criteria governing particles similarity between wind tunnel and real atmospheric boundary layer remains largely unexplored. Here, a coupled computational fluid dynamics and discrete particle model approach was employed to quantify particles concentration distribution validated by wind tunnel experiments. Quantitative validation results revealed remarkable consistency between optimized numerical model and wind tunnel experiments for particles with three different diameters. More importantly, a similarity principle governing particles dispersion between wind tunnel and real atmospheric boundary layer environment was established via comprehensive quantitative comparison of dimensionless concentration fields. This principle revealed the scaling ratio of particle aerodynamic diameter is proportional to the one-sixth power of the spatial scale ratio when performing the wind tunnel particle dispersion experiment. Further discussion showed wind velocity has no obvious effect on the similarity principle of particles. Besides, the sphericality of particles would have an impact on the similarity principle for large size particles. This study provides fundamental data to validate particles dispersion model and guidelines to perform particle dispersion experiment in the wind tunnel system.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107916"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146119181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ambient dose rate variation in the Fukushima region visualized using explainable AI techniques","authors":"Ryu Yoshida ,&nbsp;Hiroshi Kurikami ,&nbsp;Fumiya Nagao ,&nbsp;Shigeo Takahashi ,&nbsp;Yukihisa Sanada","doi":"10.1016/j.jenvrad.2026.107900","DOIUrl":"10.1016/j.jenvrad.2026.107900","url":null,"abstract":"<div><div>Following the Fukushima Daiichi Nuclear Power Station accident in 2011, ambient dose rates in the surrounding region initially increased due to the deposition of radioactive materials on the ground, and have subsequently continued to decline owing to radioactive decay and decontamination efforts to the present. However, spatial variations in dose rate reduction remain insufficiently understood, particularly in forested areas where contamination persists. In this study, long-term trends in ambient dose rate changes were investigated using explainable AI techniques. An integrated dose rate map comprising fixed-point, walk, carborne, and airborne survey data collected over 12 years was used to analyze temporal and spatial patterns. We developed a predictive model using the Light Gradient Boosting Machine framework to estimate dose rate reduction ratios based on geographic and environmental features. SHapley Additive exPlanations were applied to quantify the contribution of each variable and enhance model interpretability. Our findings revealed that land use significantly influences dose rate reduction, with urban and agricultural areas showing faster reduction because of infrastructure and human activity, including decontamination work, whereas forests exhibit slower reduction. Notably, topographical features, such as elevation and slope, affect dose rate trends in undisturbed forests, with valleys and depressions showing stagnation. This paper provides the first visual validation of area-wide decontamination effects and demonstrates the utility of explainable AI in environmental radiation analysis. The proposed approach offers a robust framework for geospatial interpretation and, with further verification, is expected to support informed policymaking for regional recovery and forest utilization.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107900"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study on the influence of coating parameters and ambient temperature on radon reduction efficiency of coatings","authors":"Zixin Li ,&nbsp;Ting Yang ,&nbsp;Hong Wang ,&nbsp;Chao Xie ,&nbsp;Lidan Lv ,&nbsp;Yuhang Zhao ,&nbsp;Bo Lei","doi":"10.1016/j.jenvrad.2026.107908","DOIUrl":"10.1016/j.jenvrad.2026.107908","url":null,"abstract":"<div><div>To investigate the influence of coating characteristics and ambient temperature on radon reduction efficiency, four types of coatings were selected for systematic testing at various ambient temperatures. The experimental results showed that the coating's solid content significantly affected its performance. The coatings exhibited the following descending order of radon suppression efficiency: waterborne polyurethane coating &gt; oily polyurethane coating &gt; oily inorganic zinc-rich coating &gt; waterborne acrylate coating. Their thermal stability also varied significantly. Waterborne polyurethane coatings demonstrate optimal thermal stability, with merely a 2.4 % fluctuation in efficiency. Furthermore, a notable difference in thermal stability was observed between water-based and oil-based polyurethane coatings.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107908"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemical assessment of radionuclides, heavy metals and POPs in urban forest soils: hidden exposure pathways and health risks","authors":"Jelena M. Stajic ,&nbsp;Biljana Nikic ,&nbsp;Snežana Štrbac ,&nbsp;Milica Kašanin-Grubin ,&nbsp;Nataša Stojić ,&nbsp;Mira Pucarević ,&nbsp;Dalibor Stajic","doi":"10.1016/j.jenvrad.2026.107911","DOIUrl":"10.1016/j.jenvrad.2026.107911","url":null,"abstract":"<div><div>Urban forests contribute significantly to human well-being and climate resilience, yet they may also act as reservoirs of contaminants such as radionuclides, heavy metals, and persistent organic pollutants (POPs). These pollutants accumulate in soils and can pose chronic exposure risks to surrounding communities. This study quantified radionuclides, heavy metals and POPs in soils of the protected Mount Avala forest near Belgrade, Serbia, and evaluated the associated health risks. Natural radionuclide activities exceeded the global averages, particularly for ⁴⁰K, while ¹³⁷Cs behavior appeared to be highly influenced by site-specific forest conditions and post-depositional processes. Mean radiological excess lifetime cancer risk (<em>ELCR</em>) was ∼60 % above the global average. Strong correlations among ²²⁶Ra, ²³²Th, Co, and Ni indicate a predominantly lithogenic origin, whereas the strong correlation between ¹³⁷Cs and DDE suggests similar dynamics of these contaminants under forest-specific conditions. The homogeneous distribution of ¹³⁷Cs and other surface-deposited contaminants indicates downward migration and redistribution over time, driven by post-depositional processes. Soils at AT6 showed extreme enrichment in As and Pb, whereas AT8 exhibited elevated PCB 52 and DDT metabolites. While radiological hazard indices remained within safety limits, certain metals and POPs exceeded non-carcinogenic and carcinogenic intervention criteria at identified hotspots. Spatial heterogeneity in pollutant concentrations reflects both geological controls and localized anthropogenic inputs. Integrating radionuclide- and contaminant-focused monitoring, hotspot-targeted remediation, and risk-informed urban planning is essential to ensure that urban green infrastructure remains safe, sustainable, and health-supportive.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107911"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146099837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of deposition velocity of 222Rn progeny in a walk-in-type calibration chamber at different 222Rn concentrations","authors":"Vijith A P ,&nbsp;Rosaline Mishra ,&nbsp;Sapra B K ,&nbsp;Mayya Y S ,&nbsp;Karunakara N","doi":"10.1016/j.jenvrad.2026.107907","DOIUrl":"10.1016/j.jenvrad.2026.107907","url":null,"abstract":"<div><div>Deposition velocities of ²²²Rn progeny were determined using ²²²Rn progeny sensors (DRPS) and flow-mode integrated samplers at various ²²²Rn gas concentrations under steady atmospheric conditions in a large walk-in type calibration chamber of volume 22.7 m³ with a surface-to-volume ratio of 2.1 m^-1. The deposition of ²²²Rn progeny on indoor surfaces is a dominant removal mechanism from the ambient air, reducing their concentration in the air and thereby decreasing the inhalation dose. Hence, knowledge of deposition velocity is important for inhalation dose assessment. Deposition velocity, defined as the ratio of the deposition atom flux (atoms cm⁻² s⁻¹) to the total airborne atom concentration (atoms cm⁻³), depends on various factors such as particle size distribution, atmospheric parameters and prevailing turbulence. In this study the impact of turbulence on deposition velocity was evaluated for two distinct situations: (i) for the surfaces facing the direction of turbulence, and (ii) for surfaces facing opposite to the turbulence direction. The deposition velocities of the progeny remained the same (considering the uncertainty associated with the measurements) regardless of the ²²²Rn gas concentrations in the chamber. The deposition velocities for the surfaces facing turbulence had a mean value of 0.0200 ± 0.0002 cm s⁻¹ (0.720 ± 0.007 m h⁻¹), while that for the surfaces facing opposite to turbulence was 0.0140 ± 0.0001 cm s⁻¹ (0.501 ± 0.004 m h⁻¹). These values are 5.5 and 3.8 times higher than the typical indoor deposition velocity of 0.132 m h⁻¹. Statistical analysis of the data confirmed that turbulence influences the deposition mechanism of ²²²Rn progeny. The data obtained from this study highlights the importance of delineating the dependence of deposition velocity on friction velocity (u∗), and the need to characterize this parameter when reporting progeny deposition rates. It also emphasises the need to consider this parameter when testing devices and deducing sensitivity factors for deposition-based passive devices.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107907"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146023179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triple continuum modeling of coupled fracture skin, colloid, and decay chain effects on radionuclide migration in fractured rock","authors":"Neng-Chuan Tien","doi":"10.1016/j.jenvrad.2026.107914","DOIUrl":"10.1016/j.jenvrad.2026.107914","url":null,"abstract":"<div><div>This study develops a triple-continuum model to systematically investigate coupled fracture skin effects, colloid-associated transport, and radioactive decay chains on radionuclide migration in fractured rock. The model explicitly resolves distinct physicochemical properties of fracture skin, mobile/deposited colloid dynamics, and multi-member decay chain complexities. Using a four-quadrant framework classifying skin permeability (semi-permeable/permeable) and colloid state (mobile/deposited), we comprehensively evaluate individual and combined impacts on key radionuclides for high-level waste disposal.</div><div>Crucially, for both the 4N + 1 and 4N + 2 decay chains, the breakthrough of Np-237 and Ra-226 under conditions of mobile colloids and permeable skin (Simulation D) was observed to exceed traditional conservative estimates (Simulation A). This counterintuitive result is attributed to the accumulation of parent radionuclides, Am-241 and Th-230, within the skin and matrix. Their subsequent in-situ decay leads to the production of daughter radionuclides (Np-237 and Ra-226) in these storage domains at concentrations that can surpass those in the fracture. This reduces the concentration gradient at the fracture-skin interface, suppressing diffusive loss from the fracture. In certain cases, it can even drive back-diffusion of daughter radionuclides from the matrix/skin into the fracture, particularly pronounced for weakly sorbing Ra-226.</div><div>By integrating fracture skin, colloid-associated transport, and decay chains, this work establishes an efficient and rigorous framework for radionuclide migration modeling. The findings conclusively demonstrate that omitting any of these coupled mechanisms can lead to non-conservative or overly conservative predictions, thereby establishing a robust scientific basis that is critical for significantly enhancing the reliability of long-term safety assessments for high-level radioactive waste disposal in geological systems.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"293 ","pages":"Article 107914"},"PeriodicalIF":2.1,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146073776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of radon and carrier gases in an underground gold mining company in Ghana","authors":"Rita kpordzro ,&nbsp;Francis Otoo ,&nbsp;Oscar K. Adukpo ,&nbsp;Eric T. Glover ,&nbsp;Anthony S.K. Amable","doi":"10.1016/j.jenvrad.2025.107851","DOIUrl":"10.1016/j.jenvrad.2025.107851","url":null,"abstract":"<div><div>Previous studies in Ghanaian mines have largely focused on radon concentration and associated health risk, with limited investigation into the role of carrier gases that influence radon transport from bedrock. This study evaluates radon (²²²Rn) levels, carrier gases (CO₂, H₂S, CH₄), and their associated health risks in an underground section of the AngloGold Ashanti mine. Measurements were conducted in two phases using CR-39 solid-state nuclear track detectors and a Ventis Pro5 multi-gas detector. The average radon concentration across both phases was 214 ± 16 Bq·m⁻³, with phase-specific means of 245 ± 8 Bq·m⁻³ and 184 ± 6 Bq·m⁻³. Based on ICRP 137, the annual effective dose and excess lifetime cancer risk were estimated at 0.6 ± 0.2 mSv y⁻¹ and 1.5 × 10⁻³ per million persons/year, respectively, both below ICRP and NCRP safety limits. Concentrations of all carrier gases remained within OSHA and Chart Industries recommended exposure limits. Principal component analysis indicated that methane and hydrogen sulfide significantly influence radon distribution with Eigenvalue &gt;1, Overall, the findings suggest that the current levels of radon and carrier gases in the mine do not pose significant health risks to underground workers.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"292 ","pages":"Article 107851"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145668633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Translating social science into policy: Recommendations for managing societal aspects of radon and NORM","authors":"Tanja Perko ,&nbsp;Nadja Zeleznik ,&nbsp;Peter Mihok","doi":"10.1016/j.jenvrad.2025.107859","DOIUrl":"10.1016/j.jenvrad.2025.107859","url":null,"abstract":"<div><div>This policy-oriented manuscript translates recent social science and humanities research (2020–2025) into evidence-based recommendations for policymakers managing societal aspects of radon and naturally occurring radioactive materials (NORM). By bridging the gap between researchers and decision-makers, the work ensures that radon and NORM policies are informed by robust evidence, context-sensitive insights, and tested approaches. The recommendations are structured across nine key fields: (1) advancing citizen science initiatives; (2) strengthening evidence-based decision-making with quantitative data; (3) enhancing policy guidance through qualitative insights; (4) improving communication strategies on radon and NORM; (5) addressing societal complexities of radon spas; (6) managing social challenges of radiological risks in geothermal energy; (7) incorporating social considerations in regulation of NORM-containing building materials; (8) reducing societal uncertainties in remediation of NORM and legacy sites; and (9) promoting sustainable, circular approaches to radon and NORM management. The recommendations were developed through review of recent research and validated through broad stakeholder consultation. Together, they provide a comprehensive roadmap for integrating science into policy, fostering resilience, sustainability, and public trust in the governance of radon and NORM across Europe.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"291 ","pages":"Article 107859"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Full spectrum modeling of in situ gamma-ray detector measurements with a focus on precipitation-induced transients","authors":"M.S. Bandstra ,&nbsp;J.M. Ghawaly ,&nbsp;D.E. Peplow ,&nbsp;D.E. Archer ,&nbsp;B.J. Quiter ,&nbsp;T.H.Y. Joshi ,&nbsp;A.D. Nicholson ,&nbsp;M.J. Willis ,&nbsp;I. Garishvili ,&nbsp;A.J. Rowe ,&nbsp;B.R. Longmire ,&nbsp;J.T. Nattress","doi":"10.1016/j.jenvrad.2025.107826","DOIUrl":"10.1016/j.jenvrad.2025.107826","url":null,"abstract":"<div><div>Gamma-ray detectors that are deployed outdoors experience increased event rates during precipitation due to the attendant increase in Rn-222 progeny at ground level. The increased radiation due to these decay products (Pb-214 and Bi-214) has been studied for many decades in applications such as atmospheric science and radiation protection. For those applications radon progeny signatures are the signal of interest, while in the fields of radiological and nuclear security and aerial radiological mapping they are a nuisance. When searching for radiological contamination or missing sources, an analyst must take precipitation into account to reduce false alarms, in addition to accounting for static background signatures. To train advanced search algorithms, an effort has been underway to generate synthetic gamma-ray event data that represent a realistic urban area, including occasional rain events to add to the realism. This manuscript describes an effort to analyze and model gamma-ray spectra measured during rainfall by a NaI(Tl) detector located outdoors in order to derive accurate source terms for Pb-214 and Bi-214 at a high frequency (less than 1 min). All known sources of background were quantitatively modeled across the full gamma-ray spectrum, so that the Pb-214 and Bi-214 activity concentrations on the ground could be inferred from a linear model fit to each spectrum. A physically motivated model was applied to the data to further smooth the fits, which had the benefit of yielding information about the concentrations of the progeny in rainwater and their apparent age, making this the first time full-spectrum modeling has been used for continuous measurements of radon progeny. Full-spectrum modeling’s ability to leverage more statistics allows for measurements at a rate of more than once per minute, rather than the more typical 10- or 15 min measurement cycle, and therefore this approach could lead to studies of radon progeny on shorter timescales than previously possible.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"291 ","pages":"Article 107826"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145258307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physics-informed optimization for emergency radiation assessment with temporal correction under meteorological uncertainty","authors":"Junni He ,&nbsp;Minghua Lyu ,&nbsp;Zhixin Qiu ,&nbsp;Xin He ,&nbsp;Bo Lu ,&nbsp;Jia Wang ,&nbsp;Shifei Shen ,&nbsp;Xiaole Zhang","doi":"10.1016/j.jenvrad.2025.107817","DOIUrl":"10.1016/j.jenvrad.2025.107817","url":null,"abstract":"<div><div>Timely and accurate radiation dose assessment is essential for effective emergency response in nuclear accidents. However, meteorological uncertainties, especially in wind data, can lead to substantial discrepancies between simulated and observed plume behaviors, compromising situational awareness and decision-making. This study proposed a physics-informed optimization framework that integrates a physical radiation assessment model with a genetic algorithm to dynamically correct time-series wind field data and mitigate discrepancies caused by meteorological uncertainty. The physical model couples the Lagrangian puff model with the point kernel integration method. To improve efficiency, a dimensionality reduction approach simplifies the three-dimensional gamma dose integration to one dimension. The proposed framework was validated using the first venting scenario of Unit 1 at the Fukushima Daiichi Nuclear Power Plant. The temporal optimization significantly enhanced the alignment of estimated and observed plume passage times. Quantitatively, the optimization respectively reduces the fractional bias (FB) and the normalized mean square error (NMSE) at the Main Gate by 57.82 % and 90.69 %, while the improvements at MP8 station reached 97.88 % (FB) and 92.19 % (NMSE). The FAC2 (Fraction of predictions within a factor of two) at the Main Gate increased substantially from 9.5 % to 52.4 % post-optimization. These improvements demonstrate the effectiveness of the proposed method in enhancing predictive accuracy for emergency radiation dose assessment and optimizing operational decision-making under complex atmospheric conditions.</div></div>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"291 ","pages":"Article 107817"},"PeriodicalIF":2.1,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}