Safe Process Structure Subindex

Table 25. Values of the Safe Process Structure Subindex 1st-... 

The Safe Process Structure Subindex for the acetic acid process is discussed in more detail in Chapter 13.2. 

All stored cases are validated on the basis of the Safe Process Structure Subindex. The validations are given for every case and included in the output. Further information on the cases is given as appendices, which describe the case in more detailed. 

The final score of the Safe Process Structure Subindex for the carbonylation process would be 2 based on this limited reasoning, since the final score of 1st is chosen on the basis of the worst case. Of course in practice one should do the reasoning on all the systems and subsystems in the process. This case study was given only to represent the principle of CBR. in reasoning the value of the Safe Process Structure Subindex. 

Case-based reasoning on the safe process structure subindex... 

The chemical and most process factors affecting the index are quite straightforward to estimate. More problematic are the equipment safety and the safety of process structure. The equipment safety subindex was developed based on evaluation of accident statistics and layout information. The evaluation of the safe process structure subindex is based on case-based reasoning, which requires experience based information on accident cases and on the operation characteristics of different process configurations. 

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