This work can be considered a first approach to the world of synchrotron machines. That field implies a lot of disciplines; in this work the focus will be in the radiological protection and all that surround it. A synchrotron can be understood as a huge microscope that produces the desired light to develop research and development for companies or for public investigation in many fields of interest. ALBA synchrotron is the only one here in Spain, and it is the synchrotron of reference to do this work. The utilization of this kind of installation also produces undesired radiation. That radia- tion can be dangerous if it is not adequately dealt. For that reason the main objective of this work is to calculate the total annual (or in a period of time) dose produced by ALBA synchrotron. It was necessary to understand the physics behind ionizing radiations and to implement it in a code. In this work are described or referenced all of the assumptions and coeficients used to do it. The values calculated from the simulations are verified, with measured dose obtained from the network of detectors that ALBA has, with a very good match. These results are far away from causing damage to the workers. At the end of this work there are also possible future working to keep developing that topic.