HAZOP
A Hazard and Operability Study (HAZOP) is a structured technique using guidewords to identify potential hazards and operability issues. Where appropriate a HAZOP can be conducted during conceptual design but definitely during the detail design phase.
During a HAZOP study the proposed design is systematically examined, section by section using the guidewords to generate a free ranging discussion. When a possible hazard or operability issue is identified, a probable cause should be identified and then the consequences of the hazard examined, and any remedial action recommended.
Prior to the HAZOP the Chair and lead designer should:
- Section Plant to be analysed into nodes/areas.
- Agree Guide Words.
- Team members.
- Suitable venue.
- Distribute the documentation pack, including drawings and nodes.
The chair should be suitably competent including training, qualifications and experience.
At the HAZOP meeting a comprehensive record should be completed at the meeting. This should include the wording of any actions, the actionee and return date. Any action sheets should be issued straight after the meeting. The chair should review the closeout action comments and check the evidence to ensure closure, where possible. Any actions unable to be closed out during the design, should be transferred to the CDM Risk Register.
Once all of the action sheets have been completed, to the satisfaction of the chair, then a closeout report shall be prepared. The report will include all relevant documentation, or references to the drawings used, including revision status.
