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

Fukai, Hirofumi*; Furuya, Masahiro*; Yamano, Hidemasa

Nuclear Engineering and Technology, 55(3), p.902 - 907, 2023/03

https://doi.org/10.1016/j.net.2022.11.010

This paper addresses reaction products and their distribution of the eutectic melting/solidifying reaction of boron carbide (BC) and stainless-steel (SS). The influence of the existence of carbon on the BC-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 BC-SS samples, a new layer was formed between BC/SS interface, and the layer was confirmed that the formed layer corresponded to amorphous carbon (graphite) or FeB or FeB. In contrast, a new layer was not clearly formed between FeB and SS interface in the FeB-SS samples.

Behavior of radionuclide release from irradiated fuel under severe accident conditions; Results of VEGA-1 test

Hidaka, Akihide; Nakamura, Takehiko; Kudo, Tamotsu; Uetsuka, Hiroshi

JAERI-Research 2001-055, 48 Pages, 2001/12

JAERI-Research-2001-055.pdf:3.9MB

no abstracts in English

Study on eutectic melting behavior of control rod materials in core disruptive accidents of sodium-cooled fast reactors, 6; Thermophysical properties of 10mass%BC-SS eutectic materials in the solid state

Takai, Toshihide; Furukawa, Tomohiro; Yamano, Hidemasa

no journal, , 

This study describes estimation results of thermophysical properties of stainless steel containing boron carbide (BC-SS) in the solid state. Obtained results will be applied to development of physical models that explain the eutectic melting behavior.

Study on eutectic melting behavior of control rod materials in core disruptive accidents of sodium-cooled fast reactors, 20; Thermophysical properties of 17mass%BC-SS eutectic in the solid state

Takai, Toshihide; Furukawa, Tomohiro; Yamano, Hidemasa

no journal, , 

For contribute to the CDA analysis computer codes development for the SS-BC liquification and relocation behavior, this paper described the measurement results of the thermophysical properties of SS-BC in the solid phase

BWR lower plenum damage by reaction between metallic debris and structural materials

Sato, Takumi; Shimomura, Kenta; Nagae, Yuji

no journal, , 

Clarification of debris formation conditions on the basis of the sampling data and experimental study using simulated fuel debris, 5; Damage behavior of lower plenum due to reaction with metallic debris

Sato, Takumi; Shimomura, Kenta; Nagae, Yuji

no journal, , 

In the Fukushima Daiichi Nuclear Power Plant accident, a molten metal pool might be formed in the lower plenum after the core slumping, and this metal debris is considered to have contributed to the initial failure of the lower plenum structures such as the control rod drive mechanism (hereinafter referred to as CRD). In order to understand the failure behavior of the lower plenum due to the reaction with the metallic debris, we conducted simulation tests using simulated metallic debris (SUS304-Zr alloy) and a simulated CRD structure test bundle, and small-scale reaction tests between the simulated metallic debris and the structural materials.