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Yamano, Hidemasa; Takai, Toshihide; Emura, Yuki; Fukuyama, Hiroyuki*; Nishi, Tsuyoshi*; Morita, Koji*; Nakamura, Kinya*; Pellegrini, M.*
Nihon Kikai Gakkai 2023-Nendo Nenji Taikai Koen Rombunshu (Internet), 5 Pages, 2023/09
A research project has been conducting thermophysical property measurement of a eutectic melt, eutectic melting reaction and relocation experiments, eutectic reaction mechanism investigation, and physical model development on the eutectic melting reaction for reactor application analysis in order to simulate the eutectic melting reaction and relocation behavior of boron carbide as a control rod material and stainless steel during a core disruptive accident in an advanced sodium-cooled fast reactor designed in Japan. This paper describes the project overview and progress until JFY2022.
Fukai, Hirofumi*; Furuya, Masahiro*; Yamano, Hidemasa
Nuclear Engineering and Technology, 55(3), p.902 - 907, 2023/03
Times Cited Count：1 Percentile：0.01(Nuclear Science & Technology)This paper addresses reaction products and their distribution of the eutectic melting/solidifying reaction of boron carbide (B
C) 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 Fe
B. In contrast, a new layer was not clearly formed between FeB and SS interface in the FeB-SS samples.
Emura, Yuki; Kamiyama, Kenji; Yamano, Hidemasa
Dai-26-Kai Doryoku, Enerugi Gijutsu Shimpojiumu Koen Rombunshu (Internet), 4 Pages, 2022/07
no abstracts in English
C) during hydrogen- and hilium-ion bombardmentsKushita, Kohei; Hojo, Kiichi; Furuno, Shigemi
Microsc. Microanal. Microstruct., 6, p.149 - 157, 1995/02
Times Cited Count：13 Percentile：65.31(Microscopy)no abstracts in English
Matsuo, Hideto; Kobayashi, Fumiaki; Sawa, Kazuhiro
Tanso, 0(159), p.185 - 191, 1993/00
no abstracts in English
Saito, Hiroyuki*; Higurashi, Koichi*; Masuyama, Daisuke*; Oki, Shigeo; Ohgama, Kazuya; Maeda, Seiichiro
no journal, ,
no abstracts in English
C with (Pu,U)OOtobe, Haruyoshi; Hayashi, Hirokazu; Takano, Masahide
no journal, ,
The high-temperature reaction of BC with U
Pu
O has been investigated. The samples were prepared by mixing BC and UPuO powders for the molar ratio of 1 to 1 and 1 to 4 and pressing them into disks. The samples heated at 1333 or 1473 K in Ar gas were identified to be the fluorite-type phases like UO by the powder X-ray diffraction method, independently of the molar ratio of BC to UPuO and the heating temperature. The formation of PuBO
was not discernable in the X-ray diffraction patterns. The samples heated at 1473 K in He-4%H gas were also the fluorite-type phases, independently of the molar ratio of BC to UPuO (1 to 1 or 1 to 4). On the other hand, the samples heated at 1333 K in He-4%H gas were composed of not only fluorite-type phases but also BC phases.
C-SS eutectic materials in the solid stateTakai, 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.
C-SS eutectic molten materialsFukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa
no journal, ,
To develop thermophysical property model to simulate eutectic reaction behavior of BC as control rod material and stainless steel: SUS316L (SS) in core disruptive accident of sodium-cooled fast reactor, thermophysical property measurement of BC-SS melt has been systematically conducted with very high temperature physical property measurement system (PROSPECT). This fiscal year's paper reports measurement results of density and surface tension of 10mass%BC-SS melt.
C-SS eutectic molten materialNishi, Tsuyoshi*; Ota, Hiromichi*; Yamano, Hidemasa
no journal, ,
It is necessary to obtain viscosity data of eutectic molten material of boron carbide (BC) and stainless steel (SS) for severe accident analyses. In this study, continuing from viscosity measurement of 5mass%BC-SS eutectic melt which was reported in JFY 2017, viscosity measurement of 10mass%BC-SS eutectic melt and its data verification have been conducted. This paper reports their results.
C-SS eutectic in the solid stateTakai, Toshihide; Furukawa, Tomohiro; Yamano, Hidemasa
no journal, ,
no abstracts in English
C into molten stainless steelEmura, Yuki; Kamiyama, Kenji; Yamano, Hidemasa
no journal, ,
In core disruptive accidents of sodium-cooled fast reactors, boron carbide used as the control material may melt into molten stainless steel and be widely transferred to the inside and outside of the core region. In this study, a series of tests was conducted to acquire the data regarding melting rate of boron carbide into molten stainless steel and its results were considered.
C-SS eutectic molten materialHigashi, Hideo*; Fukuyama, Hiroyuki*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the emissivity, thermal capacity, and thermal conductivity of the molten material of 7mass% BC-SS measured with High-Temperature Thermophysical Property Measurement System (PROSPECT) employing noncontact laser modulation calorimetry.
C-SS eutectic molten materialsFukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the density and surface tension of the molten compound of 7mass% BC-SS systematically measured with the High-Temperature Thermophysical Property Measurement System (PROSPECT).
C-SS eutectic in the solid stateTakai, 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
C-SS eutectic molten materialsFukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the density and surface tension of the molten compound of 2.5mass% BC-SS systematically measured with the High-Temperature Thermophysical Property Measurement System (PROSPECT).
C-SS eutectic molten materialHigashi, Hideo*; Fukuyama, Hiroyuki*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SS) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the emissivity, thermal capacity, and thermal conductivity of the molten material of 2.5mass% BC-SS measured with High-Temperature Thermophysical Property Measurement System (PROSPECT) employing noncontact laser modulation calorimetry.
Nishi, Tsuyoshi*; Ota, Hiromichi*; Kokubo, Hiroki*; Sato, Rika*; Yamano, Hidemasa
no journal, ,
In this study, the viscosities of the molten SS (SUS316L), 2.5mass%BC-SS, 5.0mass%BC-SS, 7.0mass%BC-SS and 10mass%BC-SS alloys were measured by the oscillating crucible method. The viscosity measurements of the molten SS, 2.5mass%BC-SS and 5mass%BC-SS, 7mass%BC-SS and 10mass%BC-SS alloys were performed in the temperature range from 1613 to 1793 K, from 1713 to 1793 K, and from 1793 to 1823 K, respectively. In these results, the viscosity increased with BC components in the BC components range from 0 to 7.0mass%. The equation of viscosity of molten BC-SS alloys was estimated by using the experimental data of the molten 2.5mass%BC-SS and 5.0mass%BC-SS, and 7.0mass%BC-SS in the temperature range from 1713 to 1793 K. The equation of viscosity of molten SS+BC alloys was determined as follows. y=Ax+B, A=0.0302, B=-9.881
10
T+2.546, where x is the BC component and T is the temperature. The uncertainty of the equation is 2.5%.
C-SS eutectic molten materialsFukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the liquidus temperature, density and surface tension of the molten compound of 15mass% BC-SS systematically measured with the High-Temperature Thermophysical Property Measurement System (PROSPECT).
C-SS eutectic molten materialHigashi, Hideo*; Fukuyama, Hiroyuki*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SS) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the emissivity, thermal capacity, and thermal conductivity of the molten material of 15mass% BC-SS measured with High-Temperature Thermophysical Property Measurement System (PROSPECT) employing noncontact laser modulation calorimetry.
