Conceptual study on recriticality prevention core having duplex pellets with neutron absorber in outer core in a fast reactor

Toshio Wakabayashi, Makoto Takahashi, Naoyuki Takaki, Yoshiaki Tachi, Mari Yano

Research output: Contribution to journalArticlepeer-review

Abstract

In a fast reactor, we evaluated a new core concept that prevents severe recriticality after whole-scale molten formation in a severe accident. A core concept in which Duplex pellets including neutron absorber are loaded in the outer core has been proposed. Analysis by the continuous energy model Monte Carlo code MVP using the JENDL-4.0 nuclear data library revealed that this fast reactor core has large negative reactivity due to fuel melting at the time of a severe accident, so that the core prevents recriticality. Regarding the core nuclear and thermal characteristics, the loading of Duplex pellets including neutron absorber in the outer core caused no significant differences from the normal core without Duplex pellets.

Original languageEnglish
Article number2753789
JournalScience and Technology of Nuclear Installations
Volume2019
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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