Size effect on the irradiation performance of coated fuel particles

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Outer coatings that were as near alike as possible were applied to two different sizes of inert TRISO particles that were larger than those commonly used to fuel HTGR reactors, and these particles were then irradiated in a test reactor to observe the influence of particle size on outer coating failures that resulted from irradiation-induced shrinkage of coatings onto the more stable SiC substrates over which they were applied. Outer coatings of plain pyrocarbon and of Si-alloyed pyrocarbon were used to make up two test pairs of particles with diameters of about 1050 ..mu..m and 1300 ..mu..m. For a fast-neutron ... continued below

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Pages: 29

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Bullock, R.E. September 1, 1980.

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Description

Outer coatings that were as near alike as possible were applied to two different sizes of inert TRISO particles that were larger than those commonly used to fuel HTGR reactors, and these particles were then irradiated in a test reactor to observe the influence of particle size on outer coating failures that resulted from irradiation-induced shrinkage of coatings onto the more stable SiC substrates over which they were applied. Outer coatings of plain pyrocarbon and of Si-alloyed pyrocarbon were used to make up two test pairs of particles with diameters of about 1050 ..mu..m and 1300 ..mu..m. For a fast-neutron fluence of 5.5 x 10/sup 25/ n/m/sup 2/ (E > 29fJ) at an irradiation temperature of 1125 K, failure was about twice as high in the larger 1300 ..mu..m particle of each test pair as in the smaller 1050 ..mu..m particle (16% versus 8%), with each of the coating types having roughly the same behavior.

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Pages: 29

Notes

NTIS, PC A03/MF A01.

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  • 15. biennial conference on carbon, Philadelphia, PA, USA, 22 Jun 1981

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  • Report No.: GA-A-15993
  • Report No.: CONF-810604-1
  • Grant Number: AT03-76ET35300
  • Office of Scientific & Technical Information Report Number: 6440554
  • Archival Resource Key: ark:/67531/metadc1206520

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 1, 1980

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 9, 2018, 12:01 p.m.

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Bullock, R.E. Size effect on the irradiation performance of coated fuel particles, article, September 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1206520/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.