Raman spectroscopy of eutectic melting between boride granule and stainless steel for sodium-cooled fast reactors

Hirofumi Fukai, Masahiro Furuya*, Hidemasa Yamano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

To understand the eutectic reaction mechanism and the relocation behavior of the core debris is indispensable for the safety assessment of core disruptive accidents (CDAs) in sodium-cooled fast reactors (SFRs). This paper addresses reaction products and their distribution of the eutectic melting/solidifying reaction of boron carbide (B4C) and stainless-steel (SS). The influence of the existence of carbon on the B4C-SS eutectic reaction was investigated by comparing the iron boride (FeB)-SS reaction by Raman spectroscopy with Multivariate Curve Resolution (MCR) analysis. The scanning electron microscopy with dispersive X-ray spectrometer was also used to investigate the elemental information of the pure metals such as Cr, Ni, and Fe. In the B4C-SS samples, a new layer was formed between B4C/SS interface, and the layer was confirmed that the formed layer corresponded to amorphous carbon (graphite) or FeB or Fe2B. In contrast, a new layer was not clearly formed between FeB and SS interface in the FeB-SS samples. All samples observed the Cr-rich domain and Fe and Ni-rich domain after the reaction. These domains might be formed during the solidifying process.

Original languageEnglish
JournalNuclear Engineering and Technology
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • Boron carbide
  • Eutectic reaction
  • Raman spectroscopy
  • Sodium-cooled fast reactor
  • Stainless steel

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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