Speaker
Description
The Wendelstein 7-X (W7-X) is a superconducting stellarator at IPP in Greifswald, which went into operation in 2015. The aim of W7-X is to demonstrate the fusion reactor relevance of the numerically optimized stellarator. It has been designed for performing high-energy plasma discharges in the range of some seconds up to 30 minutes in a steady state operation mode. The plasma is heated mostly by Electron Cyclotron Resonance Heating (ECRH) at 140 GHz with up to 9 MW. The first plasmas were produced in December 2015 starting with a few milliseconds and an energy of < 4 MJ. Since then three operational phases were performed with more than 3500 plasma experiments. In the last operational phase, which ended in October 2018, the plasma experiments reached up to an energy of 200 MJ and a duration of 100 s.
This work will give an overview about the main components (i.e. superconducting magnet system, different (future) heating systems, gas system) and its different potential hazards for the personnel safety and for the plant (investment protection). During the development of any component, a risk analysis has to be performed and measures for risk reduction are considered. These risks are controlled within different layers of protection. One layer of protection is the safety instrumented system/central safety system. The structure and the most important safety functions will be described in this talk.
