Experiences on risk analysis modelling and the preparation of safety reports in the netherlands
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Experiences on risk analysis, modelling and the preparation of safety reports in the Netherlands. Eric van der Schans Senior Consultant DHV. Content. What is in a safety report? And why? The various types of risk assessment. The objective of the safety report is twofold.

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Experiences on risk analysis modelling and the preparation of safety reports in the netherlands

Experiences on risk analysis, modelling and the preparation of safety reports in the Netherlands

Eric van der Schans

Senior Consultant

DHV


Content
Content

  • What is in a safety report? And why?

  • The various types of risk assessment


The objective of the safety report is twofold
The objective of the safety report is twofold

  • To provide a case to the authorities that the establishment can be operated safely

  • To inform the authorities and the public on the activities and risks of the establishment


And there are more objectives possible
And there are more objectives possible

  • To facilitate inspections by the authorities

  • The Safety Report as a starting point for a Population Protection Plan

  • The Safety Report as an information source within the establishment


The content of a dutch safety report
The content of a Dutch safety report

  • The required content of is specified in a “Guideline for information requirement of the Seveso II Directive”

  • Guideline is derived from EU guidelines and sharpened during pilot projects in the Netherlands

  • The safety report is divided into three volumes


The content of a dutch safety report1
The content of a Dutch safety report

  • Volume 1

    • Description of the establishment (including safety management system)

  • Volume 2

    • Detailed description of the various installations

  • Volume 3

    • Risk assessments


Risk assessment in the safety report
Risk assessment in the Safety Report

  • The objectives of the risk assessment is:

    • Demonstrate that the establishment is operated safely

    • Inform the authorities (and public) of the remaining risks of the establishment


The risk assessments focus on various kinds of risks
The risk assessments focus on various kinds of risks

  • Risk for the population

    • Quantitative Risk Assessment (QRA)

  • Risk for the environment

    • Surface water risk Assessment (SWRA)

  • Risk for personnel

    • Bowtie Analysis of available lines of defences (qualitative)

    • Emergency preparedness Analysis (semi-quantitative)


Quantitative risk assessment qra

10-5

10-6

10-7

10-8

Quantitative Risk Assessment (QRA)

  • Objective:

    • Assess the risk for the population in a quantitative way

  • Requirements:

    • Assessment criteria

    • Sound method (rules on what and how to model the risks)

    • Software tools


Surface water risk assessment
Surface water risk assessment

  • Objective:

  • Assess the risks for the surface water in a quantitative way

  • Requirements:

  • As with a QRA


Bowtie risk assessment
Bowtie Risk Assessment

  • Objective:

    • Demonstrate technical and organisational “lines of defence”

Loss of containment

Root Causes

Effect

Line of defence


Emergency preparedness analysis
Emergency preparedness Analysis

  • Objective:

    • Assess the need for a fire brigade in the establishment

  • and

    • Assess the size and equipment of the fire brigade

  • Starting point:

    • The credible effects from the bowtie


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