Challenges in spent nuclear fuel final disposal: conceptual design models

MISCELLANEOUS

Challenges in spent nuclear fuel final disposal: conceptual design models

Mukhtar Ahmed RANA

Nuclear Science and Techniques

Vol.19, No.2

pp.117-120

Published in print 20 Apr 2008

DOI：10.1016/S1001-8042(08)60035-4

CLC：TL24

29300

The disposal of spent nuclear fuel is a long-standing issue in nuclear technology. Mainly, UO₂ and metallic U are used as a fuel in nuclear reactors. Spent nuclear fuel contains fission products and transuranium elements, which would remain radioactive for 10⁴ to 10⁸ years. In this brief communication, essential concepts and engineering elements related to high-level nuclear waste disposal are described. Conceptual design models are described and discussed considering the long-time scale activity of spent nuclear fuel or high level waste. Notions of physical and chemical barriers to contain nuclear waste are highlightened. Concerns regarding integrity, self-irradiation induced decomposition and thermal effects of decay heat on the spent nuclear fuel are also discussed. The question of retrievability of spent nuclear fuel after disposal is considered.

Spent nuclear fuel disposalConceptual design modelsSelf-irradiation induced decompositionThermal effects

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