Member States, as well as most countries outside the EU, are concerned about environmental protection and measures for decreasing pollution, motivating researchers around the world to find solutions for decarbonization. One such solution may be the widespread use of hydrogen. The transport sector is one of the most difficult sectors to decarbonise, ranking first on GHG emitting sectors list. Vehicles using hydrogen as fuel to power their own propulsion systems are expected to be used more than those that work on electric batteries, ensuring the transition of the transport industry to a “green” future. Environmentally friendly technologies must overcome a number of challenges, an important issue being the safety in use. Hydrogen applications in the transport sector face challenging conditions, including very high pressures, extreme temperatures, and imminent fire and explosions risks. This is because H2 has an extremely low ignition energy, with much wider flammability limits compared to other fuel. As hydrogen refuelling station numbers are expected to increase in the comping years, special attention has to be granted for ensuring their safety in operation. Computational safety studies therefore represent a useful tool for preventing the occurrence of accidents which may lead to significant material damages or even to the loss of human lives. For modelling accidental releases and ignitions of hydrogen within a hydrogen refuelling station, specialized consequence modelling software for simulating the diffusion, jetfire and explosion of the gas has been used, the current article presenting the results and the main conclusions of the performed simulations.