ValeriaLab is a research laboratory at the University of Granada (Spain) with more than 5 years of expertise creating virtual reality environments for many different use cases. These environments represent a powerful tool at different stages of design and operation of an industrial plant or a scientific facility. During the design stage, VR reconstructions allow fast validation of maintenance/logistics processes, early detection of collision risks and immersive experiences to facilitate the design of any operation. At the operation stage, these environments enable optimization of the maintenance processes and cost- and time-effective training of the task operators. The solution has been used for fusion and is available for new applications.