Safety systems in the ITER neutral beam test facility

•Neutral Beam Test Facility adopts an integrated approach for occupational safety.•Safety system supervises plant items providing effective human machine interface.•Safety system implements safety instrumented functions according to IEC 61508/61511.•Safety system relies on fully redundant hardware a...

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Bibliographic Details
Published in:Fusion engineering and design 2019-09, Vol.146, p.246-249
Main Authors: Dal Bello, Samuele, Battistella, Manuela, Grando, Luca, Luchetta, Adriano, Moressa, Modesto, Breda, Mauro, Svensson, Lennart, Paolucci, Francesco, Labate, Carmelo Vincenzo
Format: Article
Language:English
Subjects:
Computer architecture
Data buses
Functional safety
IEC61508
Ion sources
Man-machine interfaces
Neutral beam test facility
Neutral beams
Open architectures
Operational hazards
Radiation hazards
Redundant system
Rings (mathematics)
Risk analysis
Safety
System effectiveness
Topology
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Summary:•Neutral Beam Test Facility adopts an integrated approach for occupational safety.•Safety system supervises plant items providing effective human machine interface.•Safety system implements safety instrumented functions according to IEC 61508/61511.•Safety system relies on fully redundant hardware architecture.•Safety system uses Siemens 400FH PLC, PROFISafe profile and WinCC Open Architecture. SPIDER, the experimental device of the ITER Neutral Beam Test Facility (NBTF) devoted to the study of the ion source, has recently started operation. The construction of MITICA, the full-size prototype of the ITER heating neutral beam injector, is in progress. SPIDER and MITICA operation presents many possible hazards including radiation, electrical, explosive gas, laser and fire risks. An integrated approach, referred to as the NBTF Safety System, was chosen to deal globally with all risks for people and environment safety. As many different systems collaborate to guarantee the NBTF safety, a coordinating system, called Central Safety System (CSS), was implemented to supervise safety-relevant systems and provide an effective human interface of the NBTF safety. The CSS is also required to implement directly safety instrumented functions. The requirements of the safety systems derived from the safety risk analysis. The CSS uses the Siemens SIMATIC S7 400FH PLC along with safe input/output remote nodes connected through double ring-topology, redundant Profibus network. Complying with the IEC 61508/61511 standards, the system architecture uses the PROFISafe profile and the human machine interface is based on WinCC Open Architecture. Special provisions are used for communication of safety-related information with the PLC.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2018.12.037