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Development of High Temperature Gas-Cooled Reactor Fuel for Extended Burnup

[+] Author Affiliations
Shohei Ueta, Jun Aihara, Kazuhiro Sawa

Japan Atomic Energy Agency, Oarai, Ibaraki, Japan

Masaki Honda, Noboru Furihata

Nuclear Fuel Industries, Ltd., Tokai, Ibaraki, Japan

Paper No. ICONE18-29206, pp. 11-12; 2 pages
  • 18th International Conference on Nuclear Engineering
  • 18th International Conference on Nuclear Engineering: Volume 6
  • Xi’an, China, May 17–21, 2010
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-4934-7
  • Copyright © 2010 by ASME


Current HTGRs such as the High Temperature Engineering Test Reactor (HTTR) of Japan Atomic Energy Agency (JAEA) use Tri-Isotropic (TRISO)-coated fuel particles with diameter of around 1 mm. TRISO fuel consists of a micro spherical kernel of oxide or oxycarbide fuel and coating layers of porous pyrolytic carbon (buffer), inner dense pyrolytic carbon (IPyC), silicon carbide (SiC) and outer dense pyrolytic carbon (OPyC). The principal function of these coating layers is to retain fission products within the particle. Particularly, the SiC coating layer acts as a barrier against the diffusive release of metallic fission products and provides mechanical strength for the particle [1].

Copyright © 2010 by ASME



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