CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell
In the design of magnetic confinement nuclear fusion power plants, the breeding blanket (BB) plays a crucial role since it must fulfil key functions such as tritium breeding, radiation-shielding, and removal of the heat power generated by the plasma. The latter task is achieved by the first wall (FW...
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| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Journal of Nuclear Engineering |
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| Online Access: | https://www.mdpi.com/2673-4362/3/4/27 |
| _version_ | 1797456872381349888 |
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| author | Lorenzo Melchiorri Pietro Arena Fabio Giannetti Simone Siriano Alessandro Tassone |
| author_facet | Lorenzo Melchiorri Pietro Arena Fabio Giannetti Simone Siriano Alessandro Tassone |
| author_sort | Lorenzo Melchiorri |
| collection | DOAJ |
| description | In the design of magnetic confinement nuclear fusion power plants, the breeding blanket (BB) plays a crucial role since it must fulfil key functions such as tritium breeding, radiation-shielding, and removal of the heat power generated by the plasma. The latter task is achieved by the first wall (FW) and breeding zone (BZ) cooling systems, which in the water-cooled lithium–lead (WCLL) BB employ pressurized water. Different arrangements of BZ coolant conduits have been investigated in the recent past to identify an efficient layout, which could meet the structural materials’ operational temperature constraint and which could provide the optimal coolant outlet temperature. However, most of the computational fluid dynamic (CFD) analyses that have been carried out until now have been focused on the equatorial WCLL elementary cell of the central outboard segment (COB). The aim of this work is to broaden the analysis to other relevant locations in the blanket. An assessment of the design of the cooling system of the COB bottom-cap elementary BZ cell has been identified as a top design priority due to its different geometry and thermal loads. The cooling efficiency of the BZ and FW systems is investigated to assess if the coolant-appropriate design conditions are matched and the temperature distribution in the cell is analyzed to identify the onset of hot spots. Different layouts of the FW systems are proposed and compared in terms of thermal–hydraulic reliability. |
| first_indexed | 2024-03-09T16:14:01Z |
| format | Article |
| id | doaj.art-8af4fea880a74aa3ae3efa556df1f930 |
| institution | Directory Open Access Journal |
| issn | 2673-4362 |
| language | English |
| last_indexed | 2024-03-09T16:14:01Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Nuclear Engineering |
| spelling | doaj.art-8af4fea880a74aa3ae3efa556df1f9302023-11-24T15:58:49ZengMDPI AGJournal of Nuclear Engineering2673-43622022-12-013440942010.3390/jne3040027CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary CellLorenzo Melchiorri0Pietro Arena1Fabio Giannetti2Simone Siriano3Alessandro Tassone4DIAEE Nuclear Section, Sapienza University of Rome, Street 244, 00186 Rome, ItalyDepartment of Fusion and Nuclear Safety Technology, ENEA, C.R. Brasimone, 40032 Camugnano, ItalyDIAEE Nuclear Section, Sapienza University of Rome, Street 244, 00186 Rome, ItalyDIAEE Nuclear Section, Sapienza University of Rome, Street 244, 00186 Rome, ItalyDIAEE Nuclear Section, Sapienza University of Rome, Street 244, 00186 Rome, ItalyIn the design of magnetic confinement nuclear fusion power plants, the breeding blanket (BB) plays a crucial role since it must fulfil key functions such as tritium breeding, radiation-shielding, and removal of the heat power generated by the plasma. The latter task is achieved by the first wall (FW) and breeding zone (BZ) cooling systems, which in the water-cooled lithium–lead (WCLL) BB employ pressurized water. Different arrangements of BZ coolant conduits have been investigated in the recent past to identify an efficient layout, which could meet the structural materials’ operational temperature constraint and which could provide the optimal coolant outlet temperature. However, most of the computational fluid dynamic (CFD) analyses that have been carried out until now have been focused on the equatorial WCLL elementary cell of the central outboard segment (COB). The aim of this work is to broaden the analysis to other relevant locations in the blanket. An assessment of the design of the cooling system of the COB bottom-cap elementary BZ cell has been identified as a top design priority due to its different geometry and thermal loads. The cooling efficiency of the BZ and FW systems is investigated to assess if the coolant-appropriate design conditions are matched and the temperature distribution in the cell is analyzed to identify the onset of hot spots. Different layouts of the FW systems are proposed and compared in terms of thermal–hydraulic reliability.https://www.mdpi.com/2673-4362/3/4/27breeding blanketCFDWCLLcooling systemthermal-hydraulics |
| spellingShingle | Lorenzo Melchiorri Pietro Arena Fabio Giannetti Simone Siriano Alessandro Tassone CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell Journal of Nuclear Engineering breeding blanket CFD WCLL cooling system thermal-hydraulics |
| title | CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell |
| title_full | CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell |
| title_fullStr | CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell |
| title_full_unstemmed | CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell |
| title_short | CFD Analysis and Optimization of the DEMO WCLL Central Outboard Segment Bottom-Cap Elementary Cell |
| title_sort | cfd analysis and optimization of the demo wcll central outboard segment bottom cap elementary cell |
| topic | breeding blanket CFD WCLL cooling system thermal-hydraulics |
| url | https://www.mdpi.com/2673-4362/3/4/27 |
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