Nuclear Engineering and Technology最新文献_第9页

Radiation source estimation using a connectivity-aware decentralized multi-mobile sensor system 基于连接感知的分散多移动传感器系统的辐射源估计

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-18 DOI: 10.1016/j.net.2025.103840

Minkyu Park

{"title":"Radiation source estimation using a connectivity-aware decentralized multi-mobile sensor system","authors":"Minkyu Park","doi":"10.1016/j.net.2025.103840","DOIUrl":"10.1016/j.net.2025.103840","url":null,"abstract":"<div><div>This paper proposes a cooperative search method utilizing multiple mobile sensors to estimate the characteristics of unknown radiation source. Low-level radiation signals are sparse, intermittent, and highly time-varying due to environmental refraction and sensor noise, making source estimation a significant challenge. To address these stochastic noise conditions, a particle filter, a nonlinear estimation technique, is employed for source term estimation. Furthermore, to enable successful exploration in environments lacking wireless communication infrastructure, each distributed agent estimates the overall communication connectivity and conducts the search within its communication range. To achieve this, the Laplacian matrix from graph theory is utilized to estimate communication connectivity. Additionally, to generate efficient search trajectories, each agent applies Shannon entropy, an information-theoretic measure, to guide the search process effectively.</div><div>The performance of the proposed approach has been validated through extensive ablation studies comparing scenarios with and without communication range constraints, as well as the presence and absence of communication estimation. The results demonstrate that estimating communication connectivity significantly enhances the search success rate to 94% and reduces the search time from 180.8 to 156.0 under communication constraints in the best case. Moreover, it has been observed that search performance improves as the number of mobile agents increases.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"58 1","pages":"Article 103840"},"PeriodicalIF":2.6,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144914001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Disinfection technology using the combined action of gas discharge plasma radiation and nanosecond electron beams 气体放电等离子体辐射与纳秒级电子束联合作用的消毒技术

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-15 DOI: 10.1016/j.net.2025.103841

S.Yu. Sokovnin , M.E. Balezin , V.V. Lisenkov

{"title":"Disinfection technology using the combined action of gas discharge plasma radiation and nanosecond electron beams","authors":"S.Yu. Sokovnin , M.E. Balezin , V.V. Lisenkov","doi":"10.1016/j.net.2025.103841","DOIUrl":"10.1016/j.net.2025.103841","url":null,"abstract":"<div><div>It has been proposed to use the combined action of gas discharge plasma radiation and nanosecond electron beams to achieve the lower absorbed dose of radiation sterilization of food products. Before starting the experiments, the output of ultraviolet radiation from the high pressure nanosecond gas discharge plasma is simulated. An experiment was carried out to verify the calculations. The simulation data are compared with the experimental results.</div><div>Repetitive high voltage pulse generator GVI 150 is designed for use in electrophysical technologies to be used in installation for plasma radiation and nanosecond electron beam joint action. As a result of experiments it was found out that plasma radiation of gas discharge treatment has rather low efficiency and can be used selectively, for example, for elimination of Klebsiella microorganisms. However, the technology of combining nanosecond electron beam and gas discharge plasma radiation is promising. The combination of these two types of radiation gives a synergistic effect and makes it possible to reduce the radioresistance of some microorganisms and move the lower limit of the radiation treatment window to lower values. The advantage of this technology also lies in the possibility of eliminating the negative effects of high absorbed doses during irradiation on the nutritional value and physico chemical properties of products. Despite the significant results, further research is needed. Experiments with a wider range of products, such as spices, citrus fruits and bananas, are promising.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103841"},"PeriodicalIF":2.6,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144852000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and analysis of a three-dimensional seismic isolation device for small modular reactor building 小型模块化反应堆建筑三维隔震装置的设计与分析

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-14 DOI: 10.1016/j.net.2025.103838

Jae-Hong Kim , Jung-Dae Son , Yun-Ho Shin , Dae-Seung Cho

{"title":"Design and analysis of a three-dimensional seismic isolation device for small modular reactor building","authors":"Jae-Hong Kim , Jung-Dae Son , Yun-Ho Shin , Dae-Seung Cho","doi":"10.1016/j.net.2025.103838","DOIUrl":"10.1016/j.net.2025.103838","url":null,"abstract":"<div><div>Seismic isolation in nuclear power plant (NPP) buildings has been infrequently applied using a rubber-based horizontal seismic isolation system (SIS) without vertical isolation under a peak ground acceleration (PGA) of 0.3 g as the seismic design requirement. For NPP buildings with seismic design requirements of PGA 0.5 g or greater, vertical seismic isolation has become an essential requirement to ensure the seismic protection of the systems, structures, and components (SSCs) inside the NPP, necessitating the development of feasible devices for a three-dimensional seismic isolation system (3D SIS). This study suggests a feasible device design for a 3D SIS capable of supporting a NuScale small modular reactor (SMR) building with a vertical load of 266,000 tf under a PGA seismic design requirement of 0.5 g. The performance of the designed 3D SIS in providing vertical and horizontal seismic isolation for the building is numerically examined. The proposed 3D SIS comprises 133 modularized 3D seismic isolation devices (3D SIDs) each with a vertical load capacity of 2000 tf, and dimensions of 3500 mm × 3500 mm, delivering natural frequencies of 1 and 0.3 Hz in vertical and horizontal directions, respectively. Viscous or friction damping devices are integrated into the 3D SID, designed to achieve vertical and horizontal damping ratios of at least 0.4 and 0.1, respectively, to reduce the peak acceleration response of the isolated target building to less than 0.3 g under the seismic input of 0.5 g PGA on the ground. The performance of the 3D SIS, constructed with the designed 3D SIDs for a target building, is validated through a full 3D numerical transient response analysis using ANSYS.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103838"},"PeriodicalIF":2.6,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Beam optics analysis and preliminary results of 120 keV multi-slit accelerator prototype for neutral beam injector 中性束流注入器120 keV多狭缝加速器样机光束光学分析及初步结果

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-13 DOI: 10.1016/j.net.2025.103843

Longbin Liu , Yuqian Chen , Yahong Xie , Yongjian Xu , Yuming Gu , Yingcai Wang , Wen Deng , Fang Wang , Jianglong Wei , Chundong Hu

{"title":"Beam optics analysis and preliminary results of 120 keV multi-slit accelerator prototype for neutral beam injector","authors":"Longbin Liu , Yuqian Chen , Yahong Xie , Yongjian Xu , Yuming Gu , Yingcai Wang , Wen Deng , Fang Wang , Jianglong Wei , Chundong Hu","doi":"10.1016/j.net.2025.103843","DOIUrl":"10.1016/j.net.2025.103843","url":null,"abstract":"<div><div>The performance of the ion source is critical for neutral beam injection. As a key component of the ion source, the accelerator extracts and accelerates ions from the plasma generator to the target energy. To achieve higher beam energy, a new accelerator with maximum beam energy of 120 keV was designed based on the original 80 keV multi-slit accelerator. The required grid gap modifications were analyzed using beam optics simulations. The accelerator was then integrated with a magnetic bucket plasma generator for performance evaluation. Simulation and test results demonstrate good consistency in evaluating the extraction capability. The optimum perveance of the 120 keV accelerator is approximately 1.66 × 10<sup>−6</sup> A/V<sup>3/2</sup> with a beam divergence angle of 1.15°, and it is expected to be able to extract a hydrogen ion beam of about 69 A at 120 keV. These results provide important benchmarks for ion source parameter matching.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103843"},"PeriodicalIF":2.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inherent safety evaluation of a long-life fast reactor (SALUS-100) under unprotected loss of heat sink conditions 无保护散热损失条件下长寿命快堆（SALUS-100）的固有安全性评估

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-13 DOI: 10.1016/j.net.2025.103848

Junkyu Han , Nam-il Tak , Sun Rock Choi , Hyun-Sik Park , Jonggan Hong , Ji-woong Han , In Sub Jun , Huee-Youl Ye , Jeong Ik Lee

{"title":"Inherent safety evaluation of a long-life fast reactor (SALUS-100) under unprotected loss of heat sink conditions","authors":"Junkyu Han , Nam-il Tak , Sun Rock Choi , Hyun-Sik Park , Jonggan Hong , Ji-woong Han , In Sub Jun , Huee-Youl Ye , Jeong Ik Lee","doi":"10.1016/j.net.2025.103848","DOIUrl":"10.1016/j.net.2025.103848","url":null,"abstract":"<div><div>The Korea Atomic Energy Research Institute (KAERI) is developing the long-life sodium-cooled fast reactor SALUS-100, designed for continuous 20-year operation without refueling. The concept adapts the proven technology of the Prototype Generation-IV SFR (PGSFR) to a non-light-water small modular reactor platform. To verify that these inherited technologies still provide the intrinsic sodium-cooled fast reactors (SFR) safety features—negative reactivity feedback and passive decay-heat removal via the diverse residual heat-removal system (DRHRS)—an unprotected loss-of-heat-sink (ULOHS) analysis was performed.</div><div>The transient calculations employed GAMMA+ 2.0, a system code validated against data from JOYO, PFBR, Monju, EBR-II, FFTF and other SFR facilities. A concurrent station blackout was assumed to challenge the passive cooling path, and separate cases examined the loss of one versus two intermediate-loop pumps.</div><div>During the ULOHS event, a rise in core-inlet temperature triggered dominant negative reactivity through the Doppler effect and radial core expansion, stabilizing the reactor. With a single IHTS pump trip, −0.0207 $ of reactivity was inserted at 213 s, fixing power at 73 % of nominal. When both IHTS pumps tripped, −0.0501 $ occurred at 216 s, stabilizing power at 42.6 %. The magnitude of the initial power excursion scaled with the inlet-temperature spike, highlighting the influence of rapid temperature changes on early transients. Sensitivity studies also quantified the impact of intermediate heat-transport system (IHTS) pump coast-down characteristics and timing of operator actions.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103848"},"PeriodicalIF":2.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dose coefficients for ICRP pediatric mesh-type reference computational phantoms under idealized external electron exposures 理想外部电子照射下ICRP儿科网格型参考计算幻影的剂量系数

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-13 DOI: 10.1016/j.net.2025.103852

Chansoo Choi , Bangho Shin , Sungho Moon , Yeon Soo Yeom , Chan Hyeong Kim , Wesley E. Bolch

{"title":"Dose coefficients for ICRP pediatric mesh-type reference computational phantoms under idealized external electron exposures","authors":"Chansoo Choi , Bangho Shin , Sungho Moon , Yeon Soo Yeom , Chan Hyeong Kim , Wesley E. Bolch","doi":"10.1016/j.net.2025.103852","DOIUrl":"10.1016/j.net.2025.103852","url":null,"abstract":"<div><div>In the present study, a comprehensive dataset of dose coefficients for idealized external electron exposures has been established using the newly released ICRP-156 pediatric mesh-type reference computational phantoms (MRCPs) in conjunction with the Geant4 Monte Carlo radiation transport code. The dataset comprises organ/tissue-averaged absorbed dose coefficients for the 29 target organs and tissues which contribute to the effective dose, as well as effective dose coefficients, spanning three idealized, unidirectional, whole body irradiation geometries—antero-posterior (AP), postero-anterior (PA), and isotropic (ISO)—across 49 discrete electron energies from 10 keV to 10 GeV. Comparisons with the ICRP-145 adult MRCPs revealed significant age-dependent variations, with effective dose coefficients differing by up to ∼38 times (5 years, PA, 50 keV), primarily due to variations in organ/tissue depths across different ages. Further comparisons with the ICRP-143 pediatric voxel-type reference computational phantoms (VRCPs) showed substantial differences below 10 MeV, with effective dose coefficients differing by up to four orders of magnitude, largely attributable to the inclusion of the thin skin target layer in the pediatric MRCPs. The findings of the present study are expected to serve as a valuable resource for optimizing radiological protection strategies for the pediatric population.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103852"},"PeriodicalIF":2.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the effects of thyroid size on the iodine-131 S-values of the adult mesh-type reference computational phantoms (MRCPs) 甲状腺大小对成人网格型参考计算模型（MRCPs）碘-131 s值影响的研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-12 DOI: 10.1016/j.net.2025.103835

Michael Angelo V. Gloria , Marie Josephine M. De Luna , Ramon Carlo L. Cruzpero , Vincent Peter C. Magboo , Thiansin Liamsuwan

{"title":"Investigation of the effects of thyroid size on the iodine-131 S-values of the adult mesh-type reference computational phantoms (MRCPs)","authors":"Michael Angelo V. Gloria , Marie Josephine M. De Luna , Ramon Carlo L. Cruzpero , Vincent Peter C. Magboo , Thiansin Liamsuwan","doi":"10.1016/j.net.2025.103835","DOIUrl":"10.1016/j.net.2025.103835","url":null,"abstract":"<div><div>This study investigated the effects of thyroid size reduction on the iodine-131 S-values of organs using the adult mesh-type reference computational phantoms (MRCPs) by developing adult male and female phantoms with 75 %, 50 %, 25 %, and 3.23 cm<sup>3</sup> thyroid sizes and then implementing them in Particle and Heavy Ion Transport code System version 3.341 (PHITS 3.341) using the thyroid as source. First, thyroid size reduction increased the number of electrons escaping from the thyroid which increased the S-values of its neighboring organs. Also, it decreased the thyroid mass which increased the S-value of the thyroid itself. Last, the thyroid modification process shifted the modified thyroid leftward and posteriorly relative to the position of the unmodified thyroid, potentially affecting the S-values of organs according to the inverse-square law. The added attenuation by the muscle tissue which was used to replace the resected thyroid tissue must have also decreased the S-values of other organs, especially those in the anterior side of the thyroid, but this effect requires further investigation. These findings are important when using the adult MRCPs for the assessment of the internal dose from radioactive iodine (RAI) therapy.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103835"},"PeriodicalIF":2.6,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144830708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the radiation-resistant lightweight manipulator for fusion reactors 核聚变反应堆抗辐射轻型机械臂研究

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-11 DOI: 10.1016/j.net.2025.103850

Lei Zheng , Yong Cheng , Jun Zhang , Yu Zhang , Wei Zhang , Hao Han , Jianhai Yan , Guodong Qin , Hongtao Pan , Aihong Ji

{"title":"Research on the radiation-resistant lightweight manipulator for fusion reactors","authors":"Lei Zheng , Yong Cheng , Jun Zhang , Yu Zhang , Wei Zhang , Hao Han , Jianhai Yan , Guodong Qin , Hongtao Pan , Aihong Ji","doi":"10.1016/j.net.2025.103850","DOIUrl":"10.1016/j.net.2025.103850","url":null,"abstract":"<div><div>This paper proposes a design method for the Radiation-resistant Lightweight Manipulator (RLM) to address the needs of pipe cutting, welding, and grinding in vacuum vessels. By designing optimized and customized irradiation-resistant motors, resolver-based encoders, and external drive circuits, the irradiation resistance of the RLM joint module is enhanced. Based on the structural characteristics of RLM, the static stress-strain analyses are carried out to verify the effectiveness of the structural design. For the RLM force interaction operation task, a master-slave remote operation control mode based on the conductivity principle is proposed to achieve the force-flexibility control objective of the RLM operation process. Finally, to verify the reliability and radiation resistance of the RLM system in the strong radiation environment of the vacuum vessel, the radiation experiments are conducted on the joint motors and control system of the RLM. The experimental results show that the whole RLM motor and drive system can withstand a cumulative radiation dose of 5000 Gy with the addition of a special tungsten shielding structure, which proves the radiation resistance of the whole machine.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103850"},"PeriodicalIF":2.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal ferro frit for leaching stability of radioactive metal oxide sludges-based solidified body 放射性金属氧化物渣基固化体浸出稳定性的最佳铁渣

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-11 DOI: 10.1016/j.net.2025.103851

Ki Joon Kang , Sia Hwang , Hee Reyoung Kim

{"title":"Optimal ferro frit for leaching stability of radioactive metal oxide sludges-based solidified body","authors":"Ki Joon Kang , Sia Hwang , Hee Reyoung Kim","doi":"10.1016/j.net.2025.103851","DOIUrl":"10.1016/j.net.2025.103851","url":null,"abstract":"<div><div>In nuclear power plants, the corrosion of metallic components exposed to radioactive liquid waste and coolant can result in the formation of sludge. This study examined the optimization of ferro frit additives to enhance the leaching stability of solidified radioactive sludge. Specifically, simulated sludge, composed of Fe<sub>2</sub>O<sub>3</sub>, Cr<sub>2</sub>O<sub>3</sub>, NiO, and Co, was solidified using various additives—including ferro frit 3110, ferro frit 3195, and B<sub>2</sub>O<sub>3</sub>—and evaluated for leaching stability under ANSI/ANS 16.1 conditions. Among the four target elements, Fe, Ni, and Co consistently demonstrated excellent leaching resistance, while Cr required further immobilization. Co, a key nuclide in leaching resistance assessments for radioactive waste disposal, exhibited low leachate concentrations under all tested conditions. The addition of B<sub>2</sub>O<sub>3</sub>-rich frits substantially improved Cr leaching resistance by strengthening the glass network structure and suppressing ionic mobility. This improvement is attributed to B<sub>2</sub>O<sub>3</sub>'s role in reducing non-bridging oxygen content and increasing network polymerization. As the Cr<sub>2</sub>O<sub>3</sub> and NiO content in the sludge increased, the sintering temperature required for stable solidification rose from 950 to 1050 °C. These findings demonstrate that producing chemically durable solidified radioactive sludge suitable for final disposal requires both thermal and compositional optimization, particularly through the incorporation of B<sub>2</sub>O<sub>3</sub>.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103851"},"PeriodicalIF":2.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a digital twin system for inspection UAV in fusion reactors 核聚变反应堆中无人机检测数字孪生系统的研制

IF 2.6 3区工程技术

Nuclear Engineering and Technology Pub Date : 2025-08-11 DOI: 10.1016/j.net.2025.103826

Youzhi Xu , Yi Sun , Huan Shen , Xuefei Liu , Hongtao Pan , Yong Cheng , Shijie Liu , Guodong Qin , Aihong Ji

{"title":"Development of a digital twin system for inspection UAV in fusion reactors","authors":"Youzhi Xu , Yi Sun , Huan Shen , Xuefei Liu , Hongtao Pan , Yong Cheng , Shijie Liu , Guodong Qin , Aihong Ji","doi":"10.1016/j.net.2025.103826","DOIUrl":"10.1016/j.net.2025.103826","url":null,"abstract":"<div><div>Regular inspection and maintenance of internal structures in nuclear fusion reactors are critical for ensuring safe and stable operation. To overcome the limitations of traditional inspection methods in extreme fusion environments, this study proposes an intelligent Unmanned Aerial Vehicle (UAV) inspection system based on a five-dimensional Digital Twin (DT) model. The system establishes a three-layer architecture (“cognitive-digital twin integration-intelligent decision-making”) to achieve high-fidelity virtual mapping of the UAV and its environment. A trajectory tracking algorithm leveraging Nonlinear Model Predictive Control (NMPC) is designed to integrate dynamic disturbance observers and time-varying safety constraints to resolve trajectory accuracy and obstacle avoidance coupling challenges. A ROS-Unreal Engine co-simulation framework and a three-level digital twin architecture (“L0-L1-L2”) are developed and validated through hardware-in-the-loop (HITL) simulations and synchronous mapping experiments. Results demonstrate robust performance in complex environments, with a Root-Mean-Square-Error (RMSE) of 0.092 m for virtual-real pose mapping and trajectory tracking accuracy within ±0.15 m. The system achieves complete closed-loop verification of “perception-decision-execution” in fusion reactor environments, providing a high-precision, low-risk solution for the intelligent maintenance of nuclear fusion facilities.</div></div>","PeriodicalId":19272,"journal":{"name":"Nuclear Engineering and Technology","volume":"57 12","pages":"Article 103826"},"PeriodicalIF":2.6,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144830706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0