Materials Literature
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A hydrogen gas container is one of the critical components for fuel cell vehicles (FCV), which is expected for CO2-free personal transportation. In the early stage of commercial FCV, the major container structure will be a compressed hydrogen gas cylinder, which consists of metal or plastic linear with metal boss and…
Stress corrosion cracking (SCC) has been observed in the weld joining the core spray sparger bracket to the core shroud at a number of Boiling Water Reactors (BWRs). The cracking occurs preferentially on the shroud side of the weld and has typically been detected with visual inspections. Limited ultrasonic (UT) inspec…
Gloveboxes are generally used to protect workers from the potential hazards that arise in the materials they are working with. In the middle of the 20th century gloveboxes were mainly used to protect workers against radioactive materials. Factory Mutual investigated accidents involved in gloveboxes at nuclear faciliti…
Many Code Comparisons have been done by different organizations. The differences are better and better known by Code Development Organizations like ASME, AFCEN, JSME, KEPIC, CSA and NIKIET. This paper uses the last MDEP (Multinational Design Evaluation Program) comparison for class 1 components to classify differences…
In this paper, a stress analysis on a new type of multilayer cylinder using thin shell and cross-helically interlocked shaped-steel ribbon wound layers is carried out under the action of internal pressure based on the elastic and elastic-plastic mechanics.
In this paper, research will be discussed on how to scientifically, systematically, and economically reduce greenhouse gas emissions within the state of West Virginia, USA. While fossil fuels such as coal and natural gas remain the top resources within this particular state, there are new technologies, different appro…
Stress corrosion cracking (SCC) has been observed near the welded zones of pipes made of austenitic stainless steel type 316L in boiling water reactors (BWRs). For safety, the lifetime assessment of structures in nuclear power plants is performed on the assumption that an initial crack exists. It is said that the life…
The sunlight has been considered a promising alternative energy source because of its abundance and sustainability. A solar thermal collector can turn the solar irradiation into the usable heat, and thus, its performance highly depends on the efficiency of absorber. An ideal absorber should trap most incoming solar ra…
When a corroded pressure vessel is inspected, a potential finding is multiple local thin areas (LTA’s) adjacent to one another. API-579-1/ASME FFS-1 (hereafter referred to as FFS-1) contains rules to determine if adjacent LTA’s should be combined and analyzed as a single flaw based on spacing and sizing. This paper re…
The In Situ Adaptive Tabulation (ISAT) procedure, originally developed for the efficient computation of homogeneous reactions in chemically reacting flows, is adapted and demonstrated for reacting flow computations with complex heterogeneous (or surface) reactions. The treatment of heterogeneous reactions within a rea…
Polyvinyl pyrrolidone (PVP) based titanium n-butoxide (TNBT) and zirconium n-propoxide (ZNP) composite fibres were prepared by electrospinning, and the corresponding fibres with the addition of acetic acid (HAc) were also prepared for comparison. The storage stabilities of four alkoxide composite fibres and PVP electr…
CMK-3 is a typical of carbon rods which are arranged in relatively regular two-dimensional hexagonal array. In our study, the effective thermal conductivity of CMK-3 composite is investigated. For the thermal conductivity of carbon rods, the equilibrium molecular dynamics (EMD) is performed with Tersoff potential. The…
Due to unique and tunable optical properties, gold nanoparticles (GNPs) are becoming more widely used in biological and biomedical applications. However, nanoparticles in fluid tend to lose the specific function because of aggregation in the transport process of use. Therefore, it is necessary to investigate the aggre…
Using a scale/analytical analysis approach, we model phase change (melting) for pure materials which generate constant internal heat generation for small Stefan numbers (approximately one). The analysis considers conduction in the solid phase and natural convection, driven by internal heat generation, in the liquid re…
A comprehensive numerical model is developed to predict evaporation of a water droplet from an unheated superhydrophobic substrate. Analytical models that only consider vapor diffusion in the gas domain, and assume the system to be isothermal, over-predict the evaporation rates by ∼25% compared to experiments conducte…
After the Code Case N-640 was issued in 1999, the fracture toughness curve of reactor pressure vessel materials in ASME Section XI-Appendix G was amended to the KIC curve. In Taiwan, the present pressure-temperature limit curves of normal reactor startup (heat-up) and shut-down (cool-down) for the reactor pressure ves…
High temperature pressure pipes are widely used in power stations, nuclear power plants, and petroleum refinery, which always bear combined effects of high temperature, high pressure, and corrosive media, so the local pits are the most common volume defects in pressure pipe. Due to various reasons, the defects usually…
Water management is an effective way of improving Proton Exchange Membrane (PEM) fuel cell performance and durability. Changing the wettability of gas channel walls and gas diffusion layer (GDL) is one way of controlling the water management in a fuel cell for its influence on the liquid water dynamic behavior. The ob…
Experimental investigations of the creep-rupture properties of metal of intermediate heat exchangers (IHX) from fast breeder reactor BN-600 after its operation during ∼ 170 thousands hours over temperature range of 500–550°C were carried out. IHX was produced from 18Cr-9Ni steel. To study the role of thermal aging par…
The objective of this work is to improve the HOt Blow-out Test procedure (HOBT) to determine the maximum operating temperature of Teflon-based gaskets. The study aims to analyze the relaxation of these gaskets due to creep at high temperature. The determination of their safe operating temperature limit requires a good…