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Safety Study review 
Geometry simplifiction - Does it matter in your case ?

For safety studies, in particular for QRA and fire and explosion studies  it is increasingly easy to obtain a certain result but the interpretation of the results and the reliability of the methods used to obtain them may not be as easily attained.  In some markets, the lowest bidder wins the RFP and this sometimes means a less thorough product delivered to the operator. 

We have therefore seen increasing need for the review of safety studies over the last 5 years,  in particular for QRA and fire and explosion studies as well as safety cases. Issues such as: the number of cases considered for dispersion and explosion, the ignition probability model used have key impacts on the outcomes of many types of studies and care needs to be taken when addressing these.  A good review will ensure that any study will adhere to a minimum requirement to guarantee reliable outcomes and that if any processes are deficient, that the deficiency does not affect the final result outcome. One example is the quality of a 3D geometry used for simulations. Is the level of detail suitable for the type of study undertaken ? Have simplifications resulted in a large uncertainty in the results? For example, for the purpose of  explosion modelling, the omission of certain details in the geometry can result in an underestimate of the overpressures by one to two orders of magnitude. 

Our most experienced staff have had many years' experience in carrying out and using the results of safety studies.

Safety Surveys and Audits

The purpose of a safety survey of audit is to highlight any major safety concerns prior to committing to a Safety Case. It is an investigation seeking reasons why a Safety Case may not be approved and determine a budget for any required upgrades.  This is normally performed in conjunction with a “Gap Assessment” against the latest Codes, Standards and Legislation.  Some Clients  require us to perform an annual  audit to confirm compliance with the Safety Case. This also often includes a review of the facility hazards

Hazardous Area Classification 

Hazardous  Area  Classification is the division of a facility into hazardous areas and non-hazardous areas. Hazardous areas are further divided into zones, depending on the flammability of material (including dust) and the probability of an explosive dust and flammable atmosphere occurring.  A Hazardous Area Classification (HAC) Schedule is usually developed for the Project. 


The HAC schedule will identify the extent of the hazardous area due to flammable gas or explosive dust that may arise on the Facility to facilitate appropriate selection of electrical apparatus for use.  The HAC exercise is based on AS standards for Australia or similar IEC and NFPA standards for other parts of the world. 


Passive Fire Protection Optimisation

We have specific expertise in PFP optimisation and revaluation studies . We typically use CFD and FEA as well as analytical methods to assess the requirements and required locations for PFP. PFP is generally required to mitigate consequences of jet fires and pool fires and also to prevent
escalation due to stress rupture of adjacent process equipment or to  protect critical structures (e.g. protect a flare tower )).

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