Oil & Gas
The global independenttechnical advisor
Quantitative RiskAssessment (QRA)Safety & Risk Management
Services
GL Noble Denton has a world-wide reputation for understandingand
investigating hazards associated with the energy andchemical
processing industries and undertaking safety-relatedproduct
testing. Our knowledge is combined withwell-established and
validated risk and consequence assessmenttechniques, to offer
consultancy services to customers supportingsafe and cost effective
operations for a wide range of potentiallyhazardous activities that
they undertake.
Our Approach is Developed from Over 30 Years of
HazardsExperience
Quantitative Risk Assessment (QRA) is a formalised
specialistmethod for gaining an understanding of the potential
hazards toan asset and calculating numerical individual and
societal(employee and public) risk level values for comparison
withappropriate risk criteria.
Satisfactory demonstration of acceptable risk levels is often
arequirement for approval of major hazard plant constructionplans,
including transmission pipelines, offshore platforms andstorage and
import sites.
GL Noble Dentons approach to undertaking QRAs has beendeveloped
as a result of over 30 years experience in analysingmajor accident
hazard scenarios giving our customersconfidence in the work we
undertake on their behalf.
Photos showing large scale pool fire and explosion experiments
alongside aprobabilistic contour map from GL Noble Dentons FROST
QRA package
Oil & Gas
GL Noble Dentons Approach to QRA
An overview of the general approach taken in a risk assessment
isshown in the figure below. GL Noble Denton has developed anumber
of specific software packages to perform quantitative
riskassessments. This includes the FROST and ARAMAS packages forthe
evaluation of risks relating to energy and chemical
processingonshore or offshore and the PIPESAFE package for the
evaluationof risks for buried natural gas transmission mains. These
packageshave been widely used to assess installations
worldwide.
The packages can be used to determine the consequences from,and
the risks associated with, a range of hazards. Types of hazardsthat
may be assessed include explosions, jet fires, pool fires andflash
fires. The structure and the use of correlation/phenomenological
models in the packages allow the effects ofmany parameter
variations to be studied. The large data setobtained from these
simulations provides a greater degree ofconfidence in the
conclusions that can be drawn from studies.
The models developed by GL Noble Denton have been
widelyvalidated against experimental data obtained from
large-scaleexperiments, many undertaken at our major hazards test
site atSpadeadam. These tests have not only helped us to
developpredictive models, but also for our Consultants to
understand indepth the key mechanisms involved in major accident
hazards andhow to reduce their impact. The basis of many of our
modelshave been published in peer reviewed journals. In addition,
GLNoble Denton uses Gexcons FLACS Computational Fluid Dynamics(CFD)
software to undertake more complex consequenceevaluations, where
this is appropriate, complementing the studiesusing our own
software.
GL Noble Denton - Meeting Your Safety Consultancy Needs
Safe and efficient operation is important to all areas of
industry,but with a variety of drivers and requirements. Yours may
be forthe preparation of legally required safety reports
coveringoperations, the facilitation of a hazard identification
workshop, orresults from specialist calculations for input to plant
design studies.Or you may need performance standards to be
developed forsafety critical systems, or perhaps specialist
experimentalmeasurement to demonstrate the effectiveness of a novel
safetyfeature. Whatever your needs, the wide range of experience
andfacilities within GL Noble Denton, with locations in the UK
andaround the world, is available to your organisation on
aconsultancy basis. We tailor our offerings to meet
yourrequirements and are always pleased to discuss how GL
NobleDenton can help you and your company to achieve
saferoperations.
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GL Industrial Services UK Ltd. All rights reserved
www.gl-nobledenton.com | Email [email protected]
Screenshot of a CFD simulation of the overpressure from an
explosion in anoffshore module
Overview of General Risk Management Methodology
