This article presents Virtual Radiopharmacy Laboratory (VR LAB), a virtual laboratory accessible through the Internet. VR LAB is designed and implemented in the framework of the VirRAD European project. This laboratory represents a 3D simulation of a radio-pharmacy laboratory, where learners, represented by 3D avatars, can experiment on radiopharmacy equipment by carrying out specific learning scenarios. This article describes the functionality provided by this laboratory, the motivation factors which led to its formation, the technological decisions that were made for the optimization of the system, as well as the envisioned steps to be carried out. (Contains 3 figures.)