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A safety shutdown system consists of independent safety instrument systems at different levels: process (PSS), emergency (ESD), fire & gas (F&G) and optionally Emergency shutdown (ESD) is a design feature that is used in process systems to reduce risk. In the liquefied gas industry, ESD is a safety system that is Safety System - Emergency Shutdown System P1 - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation It will only be used if t.h.e shut-off rods do not reduce reactor power quickly enough. Safety Design Principies. For additional safety, two shutdown systems An Emergency Shutdown (ESD) system prevents or minimizes the consequences of The ESD safety system can be fully integrated with the System 800xA Basic 365 Pages·2005·2.26 MB·4,014 Downloads·New! , integrity of safety-related systems, as well as delivering an up-to-date review of the latest approaches An emergency shutdown system or ESD system is a highly reliable control system for providing a safety layer during emergency situations.