Materials Literature
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Electrode catalyst used in industrial electrolysis is important material which affects oxidation-reduction reaction materially. The electrode catalyst having high catalystic activity and high durability gives efficient production of chemical materials. In this study, we proposed to search for new electrode catalyst us…
During the fast reactor nuclear fuel fission reaction, fission gases accumulate and form pores with the increasing of fuel burnup that decrease the fuel thermal conductivity, leading to overheating of the fuel element. The diffusion of plutonium and oxygen with high temperature gradient is also one of the important fu…
Once a severe accident occurs, to estimate the future behavior and risks of the plant, it is important to know the real-time fuel information such as decay heat and nuclide inventories, which is usually different from the safety evaluation with conservative conditions. In order to fulfill this requirement, Mitsubishi…
In this study, thermal properties of plain-woven laminates are analyzed using a triple-scale homogenization method. For this, thermal strain of fibers and matrix materials is incorporated into the elastic-viscoplastic homogenization theory developed by our research group. This method enables us to analyze thermal prop…
We have established a fabrication method of Split Ring Resonator (SRR) for optical region on a peelable polymer film and developed a stacking technique for the film with SRR. The film with SRR (SRR film) fabricated by nanosphere lithography can be separated from the glass substrate by melting a sacrificial layer forme…
The tensile deformation behavior of polyvinylidenedifluoride (PVDF) hollow fiber membranes used for water purification is studied. The present PVDF membrane has sub-micron pores with open cell structure. The surface and cross section of the membranes is observed by FE-SEM to investigate the microstructure (cell size a…
Hydrogen embrittlement of steel was caused due to hydrogen accumulation in the material. And the hydrogen distribution in material depends on the distribution of hydrostatic stress. Furthermore, since actual structures have the three dimensional shapes, each component will be under the local multiaxial. Therefore, con…
This paper describes verifying behaviors on spreading flow of molten metal at elevated temperature. In Fukushima Daiichi nuclear disaster, molten core leaked out to pedestal floor of PCV. To estimate statement of fuel debris, expansion information of behaviors of molten metal is one of the most important task to termi…
Loss-of-Coolant-Accident (LOCA) is a classical design basis accident which would be considered in LWR safety analyses. The development of LOCA simulation technique can benefit from thorough understanding of local thermal-mechanical states of the axial load on the cladding. This paper describes some analysis results of…
Magnetic field design inside the motor core is important to reduce the power loss and to increase the efficiency of the motor. However, direct measurement of the magnetic field in the motor core is not easy because of the presence of demagnetization field of the motor core. We developed the technique to determine the…
Experience gained in decades of nuclear safety research and previous nuclear accidents direct to the investigation of passive safety system design and accident-tolerant fuel (ATF) system which is now becoming a hot research point in the nuclear energy field. The ATF system is aim at upgrading safety characteristics of…
This paper focuses on a generic Pressure-Channel (PCh) SuperCritical Water-cooled Reactor (SCWR) concept, which is one of the six Generation-IV nuclear technologies, featuring two-pass (re-entrant) counter-flow fuel-channel assembly. This generic PCh SCWR contains 336 vertical pressure channels (pressure tubes) and ha…
It is necessary to prevent release of radioactive materials into the environment due to damage to a containment vessel in a severe accident. So we have been developing a safety system to stabilize the core melt and to avoid a molten core concrete interaction (MCCI). Although water will be injected to the debris coolin…
In this research, we aim to predict transverse shear stiffness of plain carbon textile by bending test which gives additional compression displacement by using our original bending machine. Using 3D image analysis, we evaluated the shape of specimen in a deformed configuration. We then presented approximate method to…
Recently, aluminium (Al) based composites containing each carbon fibers (CF), such as carbon nanotubes (CNT), and vapor-growth carbon fibers (VGCF), are actively developed. These fibers have high thermal conductivities and high strengths. And then Al/VGCF composites fabricated using spark plasma sintering are known to…
Исследовано взаимодействие многозарядных кластеров атомов марганца с примесными атомами Se и Te в кремнии, как при одновременном, так и при последовательном легировании. Установлено, что при определенных условиях термоотжига после диффузионного легирования происходит интенсивное взаимодействие Mn с примесями Se, Te. О…
Amount of blood vessel diseases has been increasing. Artificial vascular grafts are widely used for transplantation treatment, but they have problems such as clot generation and tissue rejection. Tissue engineering is considered as an excellent method for making artificial vascular grafts. The previous study showed th…
Porous nanoparticles are very attractive as a carrier for next generation drug delivery. To reliably deliver the proper amount of a drug with to the diseased part, the size and porosity of the nanoparticles should be controlled precisely. The atomized heating method is one of the promising techniques for producing por…
In order to combat global warming CO_2 emission reduction from the iron and steel making industry is necessary. The Active Carbon Recycling Energy System for the iron making process (iACRES) has been developed as a technical option for substantial CO_2 reduction. Lithium ortho-silicate (Li_4SiO_4, LS), which can separ…
Ammonia is a hydrogen storage material that may solve several problems related to hydrogen transportation and storage in the hydrogen economy. Catalytic thermal decomposition is a promising technique for producing hydrogen from hydrogen, however treatment of unreacted ammonia is a critical issue for fuel cell use. We…