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DNV GL © 2016
Ungraded
01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
Ungraded
01 March 2016
Safeti Offshore workshop
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Justification of blast and fire wall location for offshore structures
DNV GL © 2016
Ungraded
01 March 2016
Your Presenter – Daragh Stokes
6 Years working with Phast and Safeti
– 3 years with technical Support
– 18 months with consulting
– Now back with Sales for DNV GL Software
Responsible for
– Phast – Consequence Analysis Software
– Safeti(Phast Risk) – QRA software
– Safeti Offshore – Offshore QRA
– Maros – Upstream Reliability Modelling
– Taro – Downstream Reliability Modelling
– Others
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DNV GL © 2016
Ungraded
01 March 2016
General Structure
Introduciton
An overview of Safeti offshore
A look at fire and blast wall modelling in Safeti Offshore
Benchmarking
Analysis of Results
Determining economical blast and firewall locations based on both consequence criteria and risk criteria
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DNV GL © 2016
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01 March 2016
Learning Objectives
To see how we can use Safeti offshore for consequence and risk based decision making
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DNV GL © 2016
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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
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01 March 2016
Introduction
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The Problem with safety studies
DNV GL © 2016
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01 March 2016
The problem with safety studies
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Design Initial Design Design continues Additional Feedback
from Safety Study
Design continues Design Frozen
Safety Safety study carried out Safety Study Results
Sensitivities & Updates
Final Revision of
Report
Safety studies are static, changes can be challenging
They are time consuming,
Information can be out of date by the time the study is issued
But they are essential to the design process
DNV GL © 2016
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01 March 2016
So what can we do?
DNV GL Software and others in the industry are working on approaches and methodologies to shorted this lead time.
Some approaches include
– Integrating studies
– Re using data
– Digital Twin Concept
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DNV GL © 2016
Ungraded
01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
Ungraded
01 March 2016
An Overview of Safeti Offshore
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DNV GL © 2016
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01 March 2016
An Overview
The Software takes a typical approach to running an offshore QRA
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Layout
Parts Count
Process Condition
Scenario Definition
Event and Frequency Generation
Population Calculation
Results Generation
Risk
DNV GL © 2016
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01 March 2016
Layout
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DNV GL © 2016
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01 March 2016
Run Results
Now there is a deviation based on our recommended practice.
– Risk Based we can use Safeti Offshore to produce a range of risk results
– Consequence based
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DNV GL © 2016
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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
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01 March 2016
A look at fire and Blast Wall modelling
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DNV GL © 2016
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01 March 2016
To start with we set the vulnerability Levels
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DNV GL © 2016
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Set up the wall Characteristics
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DNV GL © 2016
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01 March 2016
Then Apply the rating
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DNV GL © 2016
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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
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01 March 2016
Analysis of results
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Risk Based
DNV GL © 2016
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01 March 2016
See Demo
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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
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01 March 2016
Analysis of results
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Consequence based
DNV GL © 2016
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01 March 2016
See Demo
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DNV GL © 2016
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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016
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01 March 2016
Determining economical blast and firewall locations based on both consequence and risk criteria
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DNV GL © 2016
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01 March 2016
Cost Benefit Analysis
As with all engineering design decisions cost benefit is a key factor.
How can we be sure that our Safety dollars are well spent?
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DNV GL © 2016
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01 March 2016
Risk Based – Impact on Life
ALARP, F-N Curves etc.
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DNV GL © 2016
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01 March 2016
Risk Based – Impact on the Asset
Cost Benefit analysis
– Does the cost of the blast wall equate to the cost of damage?
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DNV GL © 2016
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01 March 2016
Consequence based
Should this event occur can people escape?
Should this event occur what happens?
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DNV GL © 2016
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01 March 2016
SAFER, SMARTER, GREENER
www.dnvgl.com
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