Materials Literature
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At the Korea Atomic Energy Research Institute (KAERI), the Korea Research Reactor (KRR-2) and one uranium conversion plant (UCP) were decommissioned. A project was launched in 1997, for the decommissioning of KRR-2 reactor with the goal of completion by 2008. Another project for the decommissioning of the UCP was laun…
The in-situ formation mechanism of nano-scale AlN particles on the surface of pure Al powder by direct nitridation and mechanical properties of resultant P/M Al-AlN composite were investigated. Nano-scale AlN particles were formed on the powder surface by heat treatment at 873 K in N_2-H_2 mixed gas. The mean particle…
The Japan Society of Mechanical Engineers (JSME) is developing the codes and standards to reflect the lessons learned from Fukushima event and to comply with new regulation in Japan. This paper describes the activity to develop the evaluation guidelines for containment vessel structural integrity under severe accident…
実用化されている接着剤のほとんどは高分子を主成分としている。それゆえ，高分子どうしを混ぜる場合も多く，その特性の向上のためには高分子間の相溶性に関する知見はたいへん重要である。また，相溶性は界面現象に大きく影響を及ぼし，接着界面を理解するうえでも重要となる。本稿では，高分子間の相溶性に関して簡単に説明し，それに関連する現象をいくつか取り上げて紹介する。
Fuel components generated by fuel reforming using exhaust heat improve thermal efficiency of spark ignition engine. In this study, we estimated reforming fuel components of gasoline and energy recovery ratio with equilibrium calculation using chemical kinetic model of gasoline surrogate at the exhaust gas conditions w…
For water-cooled ceramic breeder blankets in fusion reactors, neutron multiplier materials such as beryllium are packed into the blankets to obtain tritium breeding capability. Pipe rupture inside the blanket leading to ingress of coolant is an important event to be assessed because the reaction of water or vapor with…
Pyrolysis of polymer waste can potentially be a source of renewable energy, as it is a possible way to produce liquid fuel. In order to industrialize the process, the kinetic behavior of the pyrolysis has to be well understood. In this study, pyrolysis of virgin low density polyethylene (LDPE) was studied using thermo…
In order to develop drug delivery systems (DDS) using liposomes, it is important to understand the effects of mechanical stresses on the water permeability of liposomes. We perform a series of molecular dynamics simulations of stretched palmitoyl-oleoyl phosphatidylcoline (POPC) lipid bilayers, which is the fundamenta…
In order to measure the two-dimensional distribution of the thickness of a metal layer coated on a dielectric layer at a time, we propose to use a micro-lens array (MLA), instead of a conventional single plano-convex lens, by which lots of surface-plasmon-resonance (SPR) dip patterns could be observed from a modified…
Hydrogen behaviors in steam, which seem to be main reason of explosion in the nuclear power plant, were investigated by simulating hydrogen to helium. Hydrogen generates by both radiolysis and water-Zr reaction. Hydrogen behaviors in vessel or pipe have not been well clarified in spite of its importance. To avoid simi…
本研究ではジアリルアミン系化合物を単独で添加した場合における穴埋め性可能性を検討した。側鎖を変化させて異なる塩基性を持たせた4種類のジアリルアミン系化合物をそれぞれ単独で添加した銅めっき液について，穴埋めめっき後の断面観察，電気化学測定，QCM測定を行なった。さらにジアリルアミン系化合物の電極吸着モデルを検討した。
In this study, we develop the constitutive model to analyse the self-healing ceramic materials within the framework of FEM. The isotropic damage and self-healing constitutive model for ceramic materials can describe not only the damage process under a certain boundary condition, but also the self-healing process under…
The effects of shot peening (SP) on the wear performance of silicon nitride were investigated. Silicon nitride plate specimens with and without SP were prepared. Then, ball on plate tests were carried out using the silicon nitride plate specimens in air under dry conditions. The wear volume of the silicon nitride plat…
Biological diversity is the result of a long evolutionary process for adaptation to various environments. This diversity has been acquired by "biological process and techniques" including "production process" "operation principles" and "operation systems", all of which differ from "human technology". "Sub-cellular str…
Surface-enhanced Raman scattering (SERS) exploits the enhancement of electromagnetic fields in close vicinity of plasmonic nanostructures, enabling characterization of analytes at the single-molecule level. The nanometer-scale spatial arrangement of plasmonic metal nanoparticles and analyte molecules has a significant…
To solve the problem of the high NOx emissions of W-shaped boiler during the combustion of low-quality coal, a technique combining an additional separated over fire air (SOFA) ports above the furnace arch and fuel-lean coal/air ports retrofit was carried out in a 600 MW subcritical W-shaped boiler. The results indicat…
Simulations based on molecular dynamics (MD) provide insight into processes occuring on atomic-scale level, with detail unprecedented by any experimental techniques. The obvious downside are the large computational costs of these atomistic computations. On the other hand, in many applications one is not interested in…
The results of investigation of phase composition and elements of morphology of nano-sized Ni-Cu powders obtained by reduction from aqua salts solutions are presented. The methods of investigation are: X-ray diffraction and small-angle X-ray scattering. The influence of the nano-sise factor on reciprocal solution of m…
This paper describes some general methodological aspects of the assessment of the damage to human life and health caused by a hypothetical nuclear accident at the nuclear power plant (NPP). Probability estimation of death (due to cancer and non-cancer effects of radiation injury), disability and incapacity of individu…
Aerodynamic pressure pulsation generated by rotating fan blades was measured using a basic experimental device consisting of fan blades, a motor, and pressure gauges. The motor was installed on a high-stiffness block via load cells and the motor reaction forces were measured by load cells. On the other hand the aerody…