safeti offshore workshop - dnv gl6 years working with phast and safeti – 3 years with technical...

DNV GL © 2016

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01 March 2016 SAFER, SMARTER, GREENER DNV GL © 2016

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Safeti Offshore workshop

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Justification of blast and fire wall location for offshore structures

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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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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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Learning Objectives

To see how we can use Safeti offshore for consequence and risk based decision making

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Introduction

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The Problem with safety studies

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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Information can be out of date by the time the study is issued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

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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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An Overview of Safeti Offshore

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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

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Layout

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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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A look at fire and Blast Wall modelling

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To start with we set the vulnerability Levels

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Set up the wall Characteristics

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Then Apply the rating

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Analysis of results

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Risk Based

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See Demo

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Determining economical blast and firewall locations based on both consequence and risk criteria

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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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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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Consequence based

Should this event occur can people escape?

Should this event occur what happens?

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safeti offshore workshop - dnv gl6 years working with phast and safeti – 3 years with technical...

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