Research and Development of Fuel Element for Chinese 10 MW High Temperature Gas-cooled Reactor

Chunhe TANG Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Yaping TANG Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Junguo ZHU Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Xueliang QIU Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Jihong LI Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Shijiang XU Division of Nuclear Materials, Institute of Nuclear Energy Technology, Tsinghua University, P. O. Box 1021, Beijing, 102201, P.R.CHINA

Abstract

The fuel elements for Chinese 10 MW High Temperature Gas-cooled Reactor (HTR-10) are spherical all- ceramic fuel elements (SFE). TRISO (Tri-isotropic) coated fuel particles (CP) are uniformly dispersed in the graphite matrix of the fuel element. All radiological fission products are almost completely retained inside the SiC layer of the intact CP. The fabrication of SFE includes UO2 kernel preparation by sol-gel method, pyrolytic carbon (PyC) and SiC coating on the UO2 kernels by Chemical Vapor Deposition, manufacture of SFE by the quasi-isostatic pressing and the inspection of over 30 kinds of properties. This paper describes research and development (R & D) and design specification of the HTR-10 SEF, summarizes the fabrication technology and quality control mastered in R & D for HTR-10 SFE.

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