Revalidation hazards analysis

Grumpier and Whittle (1996) suggest the following approaches to a revalidation hazards analysis ... 

The employer establishes a system to promptly address the team s results, timely resolve recommendations, schedule completion, and communicate the activities to affected personnel, livery five years after the completion of the initial process hazard analysis, it is equivalently updated and revalidated. Employers retain the required process hazards analyses for the life of the nmei-v -.. 

Frank, W. I. and Whittle, D. K. (2001) I Revalidating Process Hazard Analysis (AIChE). 

The reader is reminded that a HAZOP or What-If report is a living document for a facility. As changes are made to a facility or its procedures the HAZOP or What-If review(s) will be updated to represent the current facility. Process hazard analysis reviews are also required to be updated and revalidated every five years as a minimum by U.S. regulations (OSHA and EPA). 

OSHA requires that the hazards analysis be updated and revalidated at least every 5 years. The regulation does not require that a full hazards analysis be conducted for the revalidation—although it may make sense to do so if many changes have been made to the facility since the first hazards analysis was carried out, and/or the MOC process was not always followed. 

If it is decided that a full hazards analysis is not required for the revalidation, then what can be called a hazards analysis-by-exception is required. Such an approach evaluates the full hazards analysis that was performed originally, then checks out the impact of changes that have been made since that time. 

The second route for the revalidation analysis covers those cases where the MOC process was not effectively followed, or where the information base has not been kept up to date. In such cases, the team will have to conduct a full hazards analysis in order to ensure that no changes or modifications are overlooked. 

Process safety issues and concerns may come as a result of a process hazard analysis or revalidation, an incident investigation, an audit finding or a review of delays in required mechanical integrity tests and inspections. The appropriate priority must be... 

At least every five (5) years after the completion of the initial process hazard analysis, the process hazard analysis shall be updated and revalidated by a team meeting the requirements in paragraph (e)(4) of this section, to assure that the process hazard analysis is consistent with the current process. 

Process Hazard Analysis. Process hazard analyses (PrHAs) must be conducted as soon as possible for each covered process using compiled process safety information in an order based on a set of required considerations. Process hazard analyses must be updated and revalidated at least every five years and must be retained for the life of the process. 

Although Management of Change provisions cover interim changes, after the valve is in place the Process Safety Information will have to be updated before the Process Hazard Analysis is updated or revalidated, to account for potential hazards associated with the new equipment. Also, inspection and maintenance procedures and training will need to be updated (Mechanical Integrity). 

Are the PHA s updated and revalidated to assure that the process hazard analysis is consistent with the current process ... 

Production stage The Production stage is where the first article of a hardware item or the beta-version of software is produced. The Subsystem Hazard Analysis (SSHA) is generated. Scale-up is done in order to resolve production problems and costs, and to refine system capabilities. Any changes to initial system requirements or revalidation efforts must be accomplished in the Production stage. 

A chronological documentation (e.g., a logbook) of the change request procedures (identified hazards, change request description, reason for change request, decision made, impact analysis, re-verification and revalidation, all documents affected, all activities carried out and responsible persons). 

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