Layout safety devices

These facts enable a more simple layout and construction of the safety device and related parts for controlling and monitoring the pressurization. 

The ergonomic design of the controls > The ergonomic layout of the workplace > Built-in safety devices... 

Any process heat plant design implies piping through the containment to connect the reactor vessel with the chemical plant. The fracture of a pipe could result in the accumulation of a flammable gas mixture in the containment. Precautions must be taken to minimize the risk of a fire or gas explosion such as avoidance of explosive gas ingress, proper detection devices, inerting, sufficient safety distances, appropriate layout of secondary coolant boundary, explosion-proofed wall, plant isolation valve. For the PNP-500, the use of two concentric pipes for the process gas carrying lines were recommended. Alternatives are concrete channels around the gas lines or inerting of the containment [10]. 

Its approach is based on the assumption that reliability analysis cannot give evidence to all risks for workers, especially inside SMEs because of their typical features as regards organization, layout and processing. So, its main target is to provide workers consciousness about risks and the necessary devices for their own safety following this approach, it s clear that data related to system faults are inadequate to quantify risks. 

---