Results of R and D for lithium/vanadium breeding blanket design

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The self-cooled lithium/vanadium blanket concept has several attractive features for fusion power systems, including reduced activation, resistance to radiation damage, accommodation of high heat loads and operating to temperatures of 650--700 C. The primary issue associated with the lithium/vanadium concept is the potentially high MHD pressure drop experienced by the lithium as it flows through the high magnetic field of the tokamak. The solution to this issue is to apply a thin insulating coating to the inside of the vanadium alloy to prevent the generation of eddy currents within the structure that are responsible for the high MHD forces and ... continued below

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23 p.

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Mattas, R.F.; Smith, D.L.; Reed, C.B.; Park, J.H.; Kirillov, I.R.; Strebkov, Yu.S. et al. April 1, 1997.

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Description

The self-cooled lithium/vanadium blanket concept has several attractive features for fusion power systems, including reduced activation, resistance to radiation damage, accommodation of high heat loads and operating to temperatures of 650--700 C. The primary issue associated with the lithium/vanadium concept is the potentially high MHD pressure drop experienced by the lithium as it flows through the high magnetic field of the tokamak. The solution to this issue is to apply a thin insulating coating to the inside of the vanadium alloy to prevent the generation of eddy currents within the structure that are responsible for the high MHD forces and pressure drop. This paper presents progress in the development of an insulator coating that is capable of operating in the severe fusion environment, progress in the fabrication development of vanadium alloys, and a summary of MHD testing. A large number of small scale tests of vanadium alloy specimens coated with CaO and AlN have been conducted in liquid lithium to determine the resistivity and stability of the coating. In-situ measurements in lithium have determined that CaO coatings, {approximately} 5 {micro}m thick, have resistivity times thickness values exceeding 10{sup 6} {Omega}-cm{sup 2}. These results have been used to identify fabrication procedures for coating a large vanadium alloy (V-4Cr-4Ti) test section that was tested in the ALEX (Argonne Liquid metal Experiment) facility. Similar test sections have been produced in both Russia and the US.

Physical Description

23 p.

Notes

INIS; OSTI as DE97006979

Source

  • ISFNT-4: 4th international symposium on fusion nuclear technology, Tokyo (Japan), 6-11 Apr 1997

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  • Other: DE97006979
  • Report No.: ANL/TD/CP--91213
  • Report No.: CONF-970404--7
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 510421
  • Archival Resource Key: ark:/67531/metadc695423

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  • April 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 15, 2015, noon

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Mattas, R.F.; Smith, D.L.; Reed, C.B.; Park, J.H.; Kirillov, I.R.; Strebkov, Yu.S. et al. Results of R and D for lithium/vanadium breeding blanket design, article, April 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc695423/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.