Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device
To achieve commercial viability, Commonwealth Fusion System’s ARC device must maximize its availability to produce power, thus demanding a rapid maintenance process to replace radiation-damaged components. Designing robotic systems to operate in this radiation environment requires understanding the...
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| Format: | Thesis |
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Massachusetts Institute of Technology
2024
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| Online Access: | https://hdl.handle.net/1721.1/156046 |
| _version_ | 1811089265878106112 |
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| author | Murphy, Daniel T. |
| author2 | Whyte, Dennis G. |
| author_facet | Whyte, Dennis G. Murphy, Daniel T. |
| author_sort | Murphy, Daniel T. |
| collection | MIT |
| description | To achieve commercial viability, Commonwealth Fusion System’s ARC device must maximize its availability to produce power, thus demanding a rapid maintenance process to replace radiation-damaged components. Designing robotic systems to
operate in this radiation environment requires understanding the expected radiation levels and how design decisions impact those levels. This thesis uses the Rigorous Two-Step (R2S) methodology to scope the radiation environment and provide data for those design trade-offs that must be considered in future ARC design iterations. The first trend is Vanadium’s lower dose rate than Eurofer as a Vacuum Vessel and Blanket
Tank material in all configurations, making it the preferred candidate from a radiation perspective. Second, the model indicates that the choice in Blanket Tank material contributes non-trivially to the maintenance radiation environment. Third, the trends demonstrate minimal additional reduction in radiation levels from delaying the start of maintenance beyond 14 days after fusion ceases. The final trend shows the reduction
in the radiation field from the removal of the Blanket Tank with the Vacuum Vessel warrants future study. Finally, this thesis incorporates historical nuclear robotics experience to establish an iterative process by which to develop robotic radiation
requirements and assess maintenance decision effects on ARC-level optimality. |
| first_indexed | 2024-09-23T14:16:28Z |
| format | Thesis |
| id | mit-1721.1/156046 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:16:28Z |
| publishDate | 2024 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1560462024-08-13T03:19:26Z Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device Murphy, Daniel T. Whyte, Dennis G. Roemer, Thomas Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Sloan School of Management To achieve commercial viability, Commonwealth Fusion System’s ARC device must maximize its availability to produce power, thus demanding a rapid maintenance process to replace radiation-damaged components. Designing robotic systems to operate in this radiation environment requires understanding the expected radiation levels and how design decisions impact those levels. This thesis uses the Rigorous Two-Step (R2S) methodology to scope the radiation environment and provide data for those design trade-offs that must be considered in future ARC design iterations. The first trend is Vanadium’s lower dose rate than Eurofer as a Vacuum Vessel and Blanket Tank material in all configurations, making it the preferred candidate from a radiation perspective. Second, the model indicates that the choice in Blanket Tank material contributes non-trivially to the maintenance radiation environment. Third, the trends demonstrate minimal additional reduction in radiation levels from delaying the start of maintenance beyond 14 days after fusion ceases. The final trend shows the reduction in the radiation field from the removal of the Blanket Tank with the Vacuum Vessel warrants future study. Finally, this thesis incorporates historical nuclear robotics experience to establish an iterative process by which to develop robotic radiation requirements and assess maintenance decision effects on ARC-level optimality. S.M. M.B.A. 2024-08-12T14:17:36Z 2024-08-12T14:17:36Z 2024-05 2024-06-25T18:15:35.059Z Thesis https://hdl.handle.net/1721.1/156046 In Copyright - Educational Use Permitted Copyright retained by author(s) https://rightsstatements.org/page/InC-EDU/1.0/ application/pdf Massachusetts Institute of Technology |
| spellingShingle | Murphy, Daniel T. Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title | Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title_full | Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title_fullStr | Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title_full_unstemmed | Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title_short | Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device |
| title_sort | shutdown dose rate modeling for radiation requirements development and design trend analysis in the arc fusion device |
| url | https://hdl.handle.net/1721.1/156046 |
| work_keys_str_mv | AT murphydanielt shutdowndoseratemodelingforradiationrequirementsdevelopmentanddesigntrendanalysisinthearcfusiondevice |