Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications
This paper examines the modeling approaches used to analyze the electric field distribution in high-voltage direct-current gas-insulated systems (HVDC-GISs) used for the acceleration grid power supply (AGPS) of neutral beam injectors (NBIs). A key challenge in this context is the degradation of diel...
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MDPI AG
2024-12-01
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| author | Francesco Lucchini Alessandro Frescura Kenji Urazaki Junior Nicolò Marconato Paolo Bettini |
| author_facet | Francesco Lucchini Alessandro Frescura Kenji Urazaki Junior Nicolò Marconato Paolo Bettini |
| author_sort | Francesco Lucchini |
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| description | This paper examines the modeling approaches used to analyze the electric field distribution in high-voltage direct-current gas-insulated systems (HVDC-GISs) used for the acceleration grid power supply (AGPS) of neutral beam injectors (NBIs). A key challenge in this context is the degradation of dielectric performance due to radiation-induced conductivity (RIC), a phenomenon specific to the harsh radioactive environments near fusion reactors. Traditional models for gas conductivity in HVDC-GISs often rely on constant or nonlinear conductivity formulations, which are based on experimental data but fail to capture the effects of external ionizing radiation that triggers RIC. To address this limitation, a more advanced approach, the drift–diffusion recombination (DDR) model, is used, as it more accurately represents gas ionization and the influence of radiation fields. However, this increased accuracy comes at the cost of higher computational complexity. This paper compares the different modeling strategies, discussing their strengths and weaknesses, with a focus on the capabilities in evaluating the charge accumulation and the RIC phenomenon. |
| format | Article |
| id | doaj-art-66d15860ec024404b409fd79318f3a8a |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-66d15860ec024404b409fd79318f3a8a2025-08-20T02:56:05ZengMDPI AGApplied Sciences2076-34172024-12-0114241166610.3390/app142411666Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion ApplicationsFrancesco Lucchini0Alessandro Frescura1Kenji Urazaki Junior2Nicolò Marconato3Paolo Bettini4Department of Industrial Engineering, University of Padova, Via Gradenigo 6/a, 35131 Padova, ItalyConsorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, ItalyDepartment of Industrial Engineering, University of Padova, Via Gradenigo 6/a, 35131 Padova, ItalyDepartment of Industrial Engineering, University of Padova, Via Gradenigo 6/a, 35131 Padova, ItalyDepartment of Industrial Engineering, University of Padova, Via Gradenigo 6/a, 35131 Padova, ItalyThis paper examines the modeling approaches used to analyze the electric field distribution in high-voltage direct-current gas-insulated systems (HVDC-GISs) used for the acceleration grid power supply (AGPS) of neutral beam injectors (NBIs). A key challenge in this context is the degradation of dielectric performance due to radiation-induced conductivity (RIC), a phenomenon specific to the harsh radioactive environments near fusion reactors. Traditional models for gas conductivity in HVDC-GISs often rely on constant or nonlinear conductivity formulations, which are based on experimental data but fail to capture the effects of external ionizing radiation that triggers RIC. To address this limitation, a more advanced approach, the drift–diffusion recombination (DDR) model, is used, as it more accurately represents gas ionization and the influence of radiation fields. However, this increased accuracy comes at the cost of higher computational complexity. This paper compares the different modeling strategies, discussing their strengths and weaknesses, with a focus on the capabilities in evaluating the charge accumulation and the RIC phenomenon.https://www.mdpi.com/2076-3417/14/24/11666HVDCgas-insulated systemstransmission lineAGPSneutral beam injector (NBI)radiation-induced conductivity (RIC) |
| spellingShingle | Francesco Lucchini Alessandro Frescura Kenji Urazaki Junior Nicolò Marconato Paolo Bettini Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications Applied Sciences HVDC gas-insulated systems transmission line AGPS neutral beam injector (NBI) radiation-induced conductivity (RIC) |
| title | Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications |
| title_full | Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications |
| title_fullStr | Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications |
| title_full_unstemmed | Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications |
| title_short | Modeling Approaches for Accounting Radiation-Induced Effect in HVDC-GIS Design for Nuclear Fusion Applications |
| title_sort | modeling approaches for accounting radiation induced effect in hvdc gis design for nuclear fusion applications |
| topic | HVDC gas-insulated systems transmission line AGPS neutral beam injector (NBI) radiation-induced conductivity (RIC) |
| url | https://www.mdpi.com/2076-3417/14/24/11666 |
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