Computer-aided Hazard Identification Paul Chung p w h

Computer-aided Hazard Identification Paul Chung (p. w. h. chung@lboro. ac. uk) Steve Mc. Coy and Dingfeng Zhou Department of Computer Science

HAZOP Studies n n an established and widely used technique in the process industry for hazard identification time consuming, labour intensive process n n tedious expensive

Computer-aided HAZOP n different levels of support n n n electronic report form electronic data automated hazard identification n n continuous operation batch operation

Automated Hazard Identification n continuous operation n n from basic research to commercial product HAZID basic technology n n n signed directed graph representation fault propagation go through a list of deviations systematically and identify the faults that cause the deviations and the consequences that result from the faults and deviations

HAZID Overview n Features n n n automated extraction of plant design from a CAD system, e. g. Intergraph Smart. Plant P&ID and Smart Sketch convenient forms for adding any missing process specific information tick boxes for selecting analysis options n n deviations, e. g. more flow, less flow, etc. items

HAZID Overview n Features n different output formats n n n query facility for viewing analysis results n n n XML web page Excel spreadsheet e. g. viewing faults and consequences relating to a particular plant item e. g. viewing the propagation path between a particular fault and consequence compare facility for viewing the difference between two HAZID runs n useful for after making a change to the design

HAZID Demo

Automated Hazard Identification n batch operation n n early research prototype (CHECKOP) basic technology n n action representation state-based simulation go through a set of operation instructions systematically and identify potential ambiguities, operating problems and hazards applying guidewords such as before, after, no action, etc

CHECKOP Demonstration

Conclusions n automated hazard identification n continuous operation n n commercial tool that can reduce the time of HAZOP batch operation n promising area of research and development for identifying problems associated with human errors and operating procedures