Prototype for intergated hazard analysis

Abstract

The prototype of an integrated hazard-analysis system (IHAS) was developed. Essentially any process can be analyzed with this sofhvare if the system topology is correctly supplied by the user. Since all algorithms adopted are digraph-based, the system digraph must be constructed first with IHAS. The embedded feedfonvard and feedback loops are then identified and classified. On the basis of this information, three widely accepted hazard-assessment procedures-FTA, ETA, and HAZOP -can be peflormed automatically. From the results obtained in practical applications, one can see that the quality of hazard analysis is indeed improved if IHAS can be used as an aid to the human experts.

Petri-Net-Based Deductive Reasoning Strategy for Fault Identification in Batch Processes

“…Many efficient tools have been employed for the development of fault-tree synthesis algorithms, e.g., digraphs, , decision tables, and mini-fault trees, , among others. Several generic expert systems have also been constructed to produce comprehensive HAZOP reports. − The prerequisite of fault identification in using these methods is basically a qualitative system model. It can be observed from the literature that digraphs are, by far, the most popular choice. − Although the digraph-based approach has been demonstrated to be useful, it is effective mostly in applications concerning continuous processes.…”

“…Several generic expert systems have also been constructed to produce comprehensive HAZOP reports. [6][7][8] The prerequisite of fault identification in using these methods is basically a qualitative system model. It can be observed from the literature that digraphs are, by far, the most popular choice.…”

Petri-Net Models for Risk Analysis of Hazardous Liquid Loading Operations

“…However, if implemented manually on an ad hoc basis, these methodologies are often ineffective and error-prone in practical applications. Several tools were thus proposed in the literature to develop computer aids for improving the quality of analysis. − Lapp and Powers proposed the first digraph-based computer-aided fault-tree synthesis methods. Vaidyanathan and Venkatsubramanian 1,2 developed a systematic approach to automatically perform HAZOP analysis for continuous processes.…”