Steam chemical reactivity of plasma-sprayed beryllium

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Plasma-spraying with the potential for in-situ repair makes beryllium a primary candidate for plasma facing and structural components in experimental magnetic fusion machines. Deposits with good thermal conductivity and resistance to thermal cycling have been produced with low pressure plasma-spraying (LPPS). A concern during a potential accident with steam ingress is the amount of hydrogen produced by the reactions of steam with hot components. In this study the authors measure the reaction rates of various deposits produced by LPPS with steam from 350 C to above 1,000 C. They correlate these reaction rates with measurements of density, open porosity and ... continued below

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7 p.

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Anderl, R.A.; Pawelko, R.J.; Smolik, G.R. & Castro, R.G. July 1, 1998.

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Description

Plasma-spraying with the potential for in-situ repair makes beryllium a primary candidate for plasma facing and structural components in experimental magnetic fusion machines. Deposits with good thermal conductivity and resistance to thermal cycling have been produced with low pressure plasma-spraying (LPPS). A concern during a potential accident with steam ingress is the amount of hydrogen produced by the reactions of steam with hot components. In this study the authors measure the reaction rates of various deposits produced by LPPS with steam from 350 C to above 1,000 C. They correlate these reaction rates with measurements of density, open porosity and BET surface areas. They find the reactivity to be largely dependent upon effective surface area. Promising results were obtained below 600 C from a 94% theoretical dense (TD) deposit with a BET specific surface area of 0.085 m{sup 2}/g. Although reaction rates were higher than those for dense consolidated beryllium they were substantially lower, i.e., about two orders of magnitude, than those obtained from previously tested lower density plasma-sprayed deposits.

Physical Description

7 p.

Notes

INIS; OSTI as DE98057481

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  • Annual meeting of the American Nuclear Society, Nashville, TN (United States), 7-12 Jun 1998

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  • Other: DE98057481
  • Report No.: INEEL/CON--98-00019
  • Report No.: CONF-980606--
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/666034 | External Link
  • Office of Scientific & Technical Information Report Number: 666034
  • Archival Resource Key: ark:/67531/metadc703286

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  • July 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 25, 2016, 5:49 p.m.

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Anderl, R.A.; Pawelko, R.J.; Smolik, G.R. & Castro, R.G. Steam chemical reactivity of plasma-sprayed beryllium, report, July 1, 1998; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc703286/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.