Hydrogen produces no harmful by-products upon combustion, but it is highly flammable gas over a concentration of 4%2in the air. In order to use hydrogen gas safely, therefore, the hydrogen safety sensor is required wherever using the hydrogen gas. Conventionally, Palladium (I'd) metal has long been used for the safety sensors because of its high hydrogen sensitivity and selectivity to other gases. In this study, we demonstrated the hydrogen sensing using I'd nanowire array as a proto-type sensor.

In France, the steel transportation network for natural gas is connected to the distribution network which operates at lower pressure. This one (total length of 165 000 km) is mainly made of polymer pipes like polyethylene. With the introduction of hydrogen in mixture with natural gas and finally the transport of pure hydrogen, the key challenge is the high level of permeability that is to say the flow rate of hydrogen through polymer infrastructures (pipes or components like connecting parts).

In ferritic steels, especially those of higher tensile strength, Hydrogen-Induced Stress Corrosion Cracking (HISCC) can lead to sudden component failure and is thus a safety risk. The interaction of the steel with the diffusing hydrogen leads to changes in the material's properties that can be detected with micromagnetic testing methods.

The materials sensitivity to hydrogen is studied and measured in this work using the disk pressure testing, whose principle is the comparison of the rupture parameters obtained with metallic membranes tested similarly under helium and hydrogen Such technique allows various studies and reveals parameters that remain not significant with less sensitive methods This work presents an overview of numerous experimental results concerning the influence of various factors (material and gas composition, mechanical and heat treatments, type of microstructure.) on the hydrogen embrittlement of ferrous

Detection of hydrogen gas is important for safety reasons. To obtain improved hydrogen sensing performances for miniaturized sensors, copper doping in zinc oxide micro- and nanostructures were investigated. Samples were grown by hydrothermal technique at relatively low temperature and studied by X-ray diffraction, micro- Raman, SEM and sensorial techniques. It is found evidence on the improvement of the sensorial properties due to copper-doping in zinc oxide rods-like structures.

There appears a level of consternation swirling about of late that is rooted in varying interpretations by Authorities Having Jurisdiction (AHJ) such as building inspectors, electrical inspectors and so on regarding international building codes now that they have been adopted over national codes in many US jurisdictions. The intention of this paper is to identify the international codes covering hydrogen evolution in stationary battery strings and compare them with national codes, IEEE practices, Telephone company best practices and practical experience.

According to leading automobile manufacturers, hydrogen vehicles will be commercially available within the next few years. Up to now, a number of pre-production models have covered millions of test kilometres and proven to be sufficiently reliable for market launch. Nevertheless, there are still some reservations with respect to safety. The concerns are nourished by the fact that the physical properties of hydrogen differ significantly from the properties of conventional fuels like gasoline and diesel.

One still unsolved problem for the use of hydrogen as dean fuel is the safe and efficient storage of hydrogen. Currently cryo tanks, gas cylinders or metal hydrides are used. Important parameters for a hydrogen storage system ate weight and volume density, cost and safety. Recent publications [1-3] claimed that large amounts of hydrogen can be stored reversibly in carbon nanotubes from the gas phase. Similar to a gas phase experiment where the storage material absorbs hydrogen as a function of pressure the hydrogen absorption in a electrochemical system is controlled by the potential.

Plasma wall interactions studies are of primary importance for increasing the life time of the first wall in fusion devices. In ITER, the divertor target plates will receive on a small surface a significant part of the power during operation, and carbon materials will be used. Although carbon has several advantages than the materials used at other places of the plasma chamber (W and Be), they undergo chemical reactions with hydrogen and its isotopes used as fuel for the fusion reaction.