As the human demand for energy is growing by time, it's necessary to achieve as highest as possible efficiencies in energy production. One of the best sustainable energy production sources is nuclear energy. A key factor to improve the rate and performance of energy production is to train people in that area. Using simulators to educate people in the field of energy production is a superior tool to increase the quantity and quality of trained people. In our presented work we developed a Virtual Nuclear Reactor Laboratory as simulator to train students in the field of nuclear engineering. As will be seen a simulator consists of three main parts: Computational core, User interface and Scenarios. Also we introduced how virtual reality could be used to increase transmission of real feelings to the trainees.