Prototyping phase of the high heat flux scraper element of Wendelstein 7-X
Abstract
The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m2. The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. In conclusion, the prototypes are presently under fabrication.
- Authors:
-
[4];
[4];
- Max Planck Institute for Plasma Physics, Garching (Germany)
- Max Planck Institute for Plasma Physics, Greifswald (Germany)
- Univ. of Tennessee, Knoxville, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Federal Ministry of Education and Research of the Federal Republic of Germany
- OSTI Identifier:
- 1394578
- Grant/Contract Number:
- AC05-00OR22725; 03FUS0014A
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Engineering and Design
- Additional Journal Information:
- Journal Volume: 109-111; Journal Issue: PA; Journal ID: ISSN 0920-3796
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Stellarator; Wendelstein 7-X; Plasma facing component; Divertor; Monoblock
Citation Formats
Boscary, Jean, Greuner, Henri, Ehrke, G., Boswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, A., Tretter, Jorg, McGinnis, D., Lore, Jeremy D., and Ekici, K. Prototyping phase of the high heat flux scraper element of Wendelstein 7-X. United States: N. p., 2016.
Web. doi:10.1016/j.fusengdes.2016.02.001.
Boscary, Jean, Greuner, Henri, Ehrke, G., Boswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, A., Tretter, Jorg, McGinnis, D., Lore, Jeremy D., & Ekici, K. Prototyping phase of the high heat flux scraper element of Wendelstein 7-X. United States. https://doi.org/10.1016/j.fusengdes.2016.02.001
Boscary, Jean, Greuner, Henri, Ehrke, G., Boswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, A., Tretter, Jorg, McGinnis, D., Lore, Jeremy D., and Ekici, K. Thu .
"Prototyping phase of the high heat flux scraper element of Wendelstein 7-X". United States. https://doi.org/10.1016/j.fusengdes.2016.02.001. https://www.osti.gov/servlets/purl/1394578.
@article{osti_1394578,
title = {Prototyping phase of the high heat flux scraper element of Wendelstein 7-X},
author = {Boscary, Jean and Greuner, Henri and Ehrke, G. and Boswirth, Bernd and Wang, Zhongwei and Clark, Emily and Lumsdaine, A. and Tretter, Jorg and McGinnis, D. and Lore, Jeremy D. and Ekici, K.},
abstractNote = {The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m2. The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. In conclusion, the prototypes are presently under fabrication.},
doi = {10.1016/j.fusengdes.2016.02.001},
journal = {Fusion Engineering and Design},
number = PA,
volume = 109-111,
place = {United States},
year = {Thu Mar 24 00:00:00 EDT 2016},
month = {Thu Mar 24 00:00:00 EDT 2016}
}
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Works referenced in this record:
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journal, October 2014
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Fabrication and testing of W7-X pre-series target elements
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Design, performance and construction of a 2MW ion beam test facility for plasma facing components
journal, November 2005
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journal, September 2016
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Design analysis and manufacturing of the cooling lines of the in vessel components of WENDELSTEIN 7-X
journal, October 2011
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Development activities of the high heat flux scraper element
journal, October 2015
- Boscary, J.; Lore, J.; Lumsdaine, A.
- Fusion Engineering and Design, Vol. 98-99
Works referencing / citing this record:
Development and Performance of Tungsten-Coated Graphitic Foam for Plasma-Facing Components
journal, May 2019
- Youchison, D. L.; Coenen, J. W.; Gray, T. K.
- Fusion Science and Technology, Vol. 75, Issue 6