High burn-up operation and MOX burning in LWR; Effects of burn-up and extended cooling period of spent fuel on vitrification and disposal

Kota Kawai, Hiroshi Sagara, Kenji Takeshita, Masahiro Kawakubo, Hidekazu Asano, Yaohiro Inagaki, Yuichi Niibori, Seichi Sato

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Looking ahead to final disposal of high-level radioactive waste arising from further utilization of nuclear energy, the effects of high burn-up of light-water reactors (LWR) with UO 2 and MOX fuel and extended cooling period of spent fuel on waste management and disposal were discussed. It was assumed that the waste loading of waste glass is restricted by three factors: heat generation rate, MoO 3 content, and platinum group metal content. As a result of evaluation for effects of extended cooling period, the waste loading of waste glass from both UO 2 and MOX spent fuel could be increased in the current vitrification technology. For the storage of waste glass from MOX spent fuel with higher waste loading, however, those waste glass require long storage period prior to geological disposal because decay heat of 241 Am contributes significantly. Therefore, the evaluation of effects of Am separation on the storage period was performed. Furthermore, heat transfer calculation was carried out in order to evaluate the temperature of buffer material in a geological repository. The results showed, 70 to 90% of Am separation is sufficiently effective in terms of thermal feasibility of a repository.

Original languageEnglish
Pages (from-to)1130-1140
Number of pages11
Journaljournal of nuclear science and technology
Volume55
Issue number10
DOIs
Publication statusPublished - Oct 3 2018

Fingerprint

light water reactors
vitrification
spent fuels
Vitrification
Light water reactors
Spent fuels
disposal
Cooling
cooling
Glass
glass
Waste disposal
Geological repositories
waste management
waste disposal
evaluation
heat generation
radioactive wastes
Heat generation
Waste management

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

High burn-up operation and MOX burning in LWR; Effects of burn-up and extended cooling period of spent fuel on vitrification and disposal. / Kawai, Kota; Sagara, Hiroshi; Takeshita, Kenji; Kawakubo, Masahiro; Asano, Hidekazu; Inagaki, Yaohiro; Niibori, Yuichi; Sato, Seichi.

In: journal of nuclear science and technology, Vol. 55, No. 10, 03.10.2018, p. 1130-1140.

Research output: Contribution to journalArticle

Kawai, Kota ; Sagara, Hiroshi ; Takeshita, Kenji ; Kawakubo, Masahiro ; Asano, Hidekazu ; Inagaki, Yaohiro ; Niibori, Yuichi ; Sato, Seichi. / High burn-up operation and MOX burning in LWR; Effects of burn-up and extended cooling period of spent fuel on vitrification and disposal. In: journal of nuclear science and technology. 2018 ; Vol. 55, No. 10. pp. 1130-1140.
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