5-9 September 2016
Prague Congress Centre
Europe/Prague timezone

P3.038 Application of the engineering standard for functional safety to the W7-X central safety system

7 Sep 2016, 11:00
1h 20m
Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Foyer 2A (2nd floor), 3A (3rd floor)

Prague Congress Centre

5. května 65, Prague, Czech Republic
Board: 38
Poster C. Plasma Engineering and Control P3 Poster session

Speaker

Reinhard Vilbrandt (Max-Planck-Institute for Plasma Physics)

Description

The commissioning and final validation of the central safety system and the acceptance by the authority were very important steps immediately before the successful ignition of the first plasma in Wendelstein 7-X in December 2016. Safety is the mandatory prerequisite for the operation of experimental devices of course to protect the personnel and the investment from hazardous situations. To fulfill these requirements the system has to control all dangerous situations with high availability and reliability. On the other hand the safety system has to be designed and realized very carefully to avoid safe but nuisance trips which might hinder experiments. Therefore the W7-X-team implemented a controlled process to develop and implement the Safety Integrated System (SIS) based on the international safety standard IEC 61511 (very similar to ANSI/ISA 84) for the process industry sector as guideline. This standard is based mainly on the concept of the safety lifecycle and safety integrity levels (SIL). The hazard and risk assessment delivers the allocation of the identified safety functions to different protection layers and the necessary SIL rating for the SIS. All activities to specify the requirements of the SIS, the design, the implementation, commissioning and validation follow the v-shape model proposed in the standard. Each single step is carried out with documented verification against the results of the previous development stages. In the end the validation shows whether the demands to the whole SIS are fulfilled. Of course the SIS must be operated and maintained in the future. Modifications and extensions in the future are foreseeable.

Co-authors

Andreas Werner (Max-Planck-Institute for Plasma Physics, Greifswald, Germany) Dirk Naujoks (Max-Planck-Institute for Plasma Physics, Greifswald, Germany) Georg Kuhner (Max-Planck-Institute for Plasma Physics, Greifswald, Germany) Hans-Stephan Bosch (Max-Planck-Institute for Plasma Physics, Greifswald, Germany) Jorg Schacht (Max-Planck-Institute for Plasma Physics, Greifswald, Germany) Reinhard Vilbrandt (Max-Planck-Institute for Plasma Physics, Greifswald, Germany)

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