experiences on risk analysis, modelling and the preparation of safety reports in the netherlands...
TRANSCRIPT
Experiences on risk analysis, modelling and the
preparation of safety reports in the Netherlands
Eric van der SchansSenior ConsultantDHV
Content
1. What is in a safety report? And why?
2. The various types of risk assessment
The objective of the safety report is twofold
1. To provide a case to the authorities that the establishment can be operated safely
2. To inform the authorities and the public on the activities and risks of the establishment
And there are more objectives possible
3. To facilitate inspections by the authorities
4. The Safety Report as a starting point for a Population Protection Plan
5. The Safety Report as an information source within the establishment
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 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
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
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)
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
Objective:Assess the risks for the surface water in a quantitative way
Requirements:As with a QRA
Bowtie Risk Assessment
Objective: Demonstrate technical and organisational
“lines of defence”R
oot C
ause
s
Effe
ct
Loss of containment
Line of defence
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