Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The Stern-Volmer constant is specified for the luminescence quenched by reversible ionization of excited molecules. The exergonic branch of the Rehm-Weller free energy dependence of this constant is known to be a plateau determined by irreversible ionization being under diffusion control. In the endergonic region the…
In a radioactive material (RAM) packaging, the formation of eutectic at the Pu/SS (plutonium/stainless steel) interface is a serious concern and must be avoided to prevent of leakage of fissile material to the environment. The eutectic temperature for the Pu/SS is rather low (410°C) and could seriously impact the stru…
The US Nuclear Regulatory Commission (NRC) is studying the performance of seals in spent nuclear fuel (SNF) transportation packages exposed to fires that could exceed the hypothetical accident condition fire described in Title 10 of the Code of Federal Regulations, Part 71, such as the Baltimore Tunnel Fire that occur…
Ischaemic heart disease is one of the leading causes of morbidity and mortality in the industrialised world. Although pharmacological and interventional strategies for revascularisation have improved the outcome of ischaemic heart disease, the possibility of reversing progressive ventricular remodeling remains a major…
Microfibrous Entrapped Catalyst (MFEC) manufactured from 8 $m diameter nickel fibers were engineered into pleated heterogeneous catalytic reactors to improve removal performance over that of conventional packed bed and monolith reactors. The main enabling attribute of microfibrous materials is that small particles (15…
The influence of LWR coolant environment to the lifetime of materials has been discussed recent years. Nowadays the consideration of environmentally assisted fatigue is under consideration in Codes and Standards like ASME and the German KTA Rules (e.g. Standard No. 3201.2 and Standard No. 3201.4) by means of so called…
Study on the interaction effect of multiple cracks on the collapse load during ductile crack growth processes is important for the integrity evaluation of nuclear structure. The ductile fracture processes are well studied numerically by using Gurson’s constitutive equation and taking into account of void growth during…
It is common practice to proof test high pressure vessels prior to their use in the field. One technique for leak testing these vessels is submersion in water. A test failure at high pneumatic pressure and can pose several hazards to nearby personnel, such as projectile launch and blast loads. Submerged underwater tes…
The Fitness-for-Service assessment of Zr 2.5Nb pressure tubes in CANDU reactors requires the evaluation of fatigue. As-designed, the pressure tubes do not contain notches, but in operation various degradation mechanisms, such as fretting and crevice corrosion, can generate flaws with small root radii. Since these flaw…
During operation, reactor components experience a range of static and cyclic loading that have the potential to result in environmental-fatigue crack initiation and growth. Recent experimental work has indicated that the ASME XI fatigue ‘in air’ design curves are non-conservative for fatigue cracks propagating in prim…
In this study, infrared (IR) thermography was tested on pipe specimens with artificial wall-thinning defects of various dimensions, in order to determine optimal thermal injection conditions and the capability of the procedure for detecting wall-thinning defects in small-bore nuclear piping components. An active IR me…
Oil gas is the most clean fuel. Till 2020, the requirement of oil gas will increase 104%, but consumers are mainly live in developed cities, and oil and gas resources are located in ice field, hungriness, ocean and polar place. That is, the undeveloped resources are remote from the cities. It means, long distance tran…
Fatigue life of polycrystalline materials is mainly governed by the early stages of surface short cracks. Initiation and micro-propagation phases, which represent from 50% to 80% of total component life, are experimentally proven to depend on material microstructure. The aim of this numerical study is to highlight the…
To survey core internals simply, new microscopic observation techniques were developed. These techniques were involved the use of “Gel electrode” and “underwater microscope”. A Gel electrode can etch the surface of core internals without a watertight reservoir that makes an etching environment. The underwater microsco…
At Entergy River Bend Station (a 978 MWe BWR located near Baton Rouge, Louisiana) snubber examination and testing have become unwanted expenses with the potential to lengthen planned outages and increase ALARA concerns. This paper presents a new concept for snubber replacement which can be used to expand the “Snubber…
The structural stability and theoretical strength of BCC crystals Fe, V, Nb and Ta under hydrostatic loading have been investigated by using the modified analytical embedded atom method (MAEAM). For all the calculated BCC crystals, the failures occur while the relation m >0 is violated in compression and k >0 is viola…
Conservative static load methodologies have been devised to design equipment against postulated hydrogen detonation. However, these methodologies do not address the dynamic response of the system. Moreover, dynamic response methodologies can be used in lieu of static analyses, if the moving pressure profile due to det…
Metal hydrides (MH) are often preferred to absorb and desorb hydrogen at ambient temperature and pressure with a high volumetric density. These hydrogen storage alloys create promising prospects for hydrogen storage and can solve the energetic and environmental issues. In the present research work, the goal of our stu…
Recently, Risk-Based Inspection (RBI) evaluation technique based on API 581 has become a preferred approach to determine economic feasibility and safety to plants. However, there are limitations of applying API 581 to Liquefied Natural Gas (LNG) plant because its liquefaction process is operated in cryogenic temperatu…
Counter-intuitive phenomenon has been reported in beams, plates and rings. In this paper, we present thorough investigation on the counter-intuitive breathing mode response of elastic-plastic spherical shells subjected to impulsive loading, which is due to the combined effects of the plastic energy dissipation and the…