Reactor CGU

One key issue to automate the hazard evaluation process is to find a systematic way to represent the fault propagation in the plant process. This section describes a new way of representing the fault propagation in process plant using examples from HDS reactor CGU. 

Reactor CGU of HDS is used as a case study to illustrate the fault propagation model. The simplified P ID of the reactor CGU is shown in figure 3-21. The equivalent object-oriented model representation of the... 

Reactor process has been selected in this example. The P ID of HDS plant has been divided into control group units or CGUs, which is used to analyze process safety in smaller parts of the plant process. This means that fault propagation from one CGU to another is achieved only through the control valves or connection points between these CGUs. The simplified P ID of the reactor CGU (CGU3) can be viewed in figure 3-21. 

Figure 9-3 shows the detailed model representation of the reactor CGU of HDS plant. In this model, the different components are represented as classes, while the fluid flow is represented as data flow, which is linked to a stereotype of the class of the fluid. For example Fld-Flw-2-28 is the fluid flow from the Fumace-2-1 to the Reactor-2-1. This fluid is associated with the stereotype of the fluid mix of Diesel + H2. 

Gas circulation although this is an operation that aims at the reactor circuit in the CGU 2, it is also included in CGU 4. 

Reduce in the inertia of reactor in Reactor-2-1 (6) Affect the amine Scrubber CGU (CGU3)... 

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