Ceramic breeder materials : status and needs.

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The tritium breeding blanket is one of the most important components of a fusion reactor because it directly involves both energy extraction and tritium production, both of which are critical to fusion power. Because of their overall desirable properties, lithium-containing ceramic solids are recognized as attractive tritium breeding materials for fusion reactor blankets. Indeed, their inherent thermal stability and chemical inertness are significant safety advantages. In numerous in-pile experiments, these materials have performed well, showing good thermal stability and good tritium release characteristics. Tritium release is particularly facile when an argon or helium purge gas containing hydrogen, typically at levels ... continued below

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18 p.

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Johnson, C.E. February 2, 1998.

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The tritium breeding blanket is one of the most important components of a fusion reactor because it directly involves both energy extraction and tritium production, both of which are critical to fusion power. Because of their overall desirable properties, lithium-containing ceramic solids are recognized as attractive tritium breeding materials for fusion reactor blankets. Indeed, their inherent thermal stability and chemical inertness are significant safety advantages. In numerous in-pile experiments, these materials have performed well, showing good thermal stability and good tritium release characteristics. Tritium release is particularly facile when an argon or helium purge gas containing hydrogen, typically at levels of about 0.1%, is used. However, the addition of hydrogen to the purge gas imposes a penalty when it comes to recovery of the tritium produced in the blanket. In particular, a large amount of hydrogen in the purge gas will necessitate a large multiple-stage tritium purification unit, which could translate into higher costs. Optimizing tritium release while minimizing the amount of hydrogen necessary in the purge gas requires a deeper understanding of the tritium release process, especially the interactions of hydrogen with the surface of the lithium ceramic. This paper reviews the status of ceramic breeder research and highlights several issues and data needs.

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18 p.

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OSTI as DE00010626

Medium: P; Size: 18 pages

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  • 8th International Conference on Fusion Reactor Materials, Sendai (JP), 10/26/1997--10/31/1997

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  • Report No.: ANL/CMT/CP-95540
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10626
  • Archival Resource Key: ark:/67531/metadc621463

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  • February 2, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 4:05 p.m.

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Johnson, C.E. Ceramic breeder materials : status and needs., article, February 2, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc621463/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.