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MHI Risk Assessment - MHI Risk Engineers - adding value to your organisation

MHI RISK ASSESSMENT REPORT

 

The MHI Risk Assessment process is shown in the diagram below

The MHI Risk Assessment report done according to the SANS 1461 standard  has the following format :

1        Introduction  

1.1.    Scope of the Risk Assessment

1.2.    Legal Aspects

1.3.    Methodology

2        Description

2.1     Company Main Activities     

2.2     Location

2.3     Process Description

2.4     Map showing developments

2.5     Number of People on site

2.5.1  Population Data    

2.6     Details of neighbouring facilities

2.7     Relevant meteorology

2.7.1  Weather

2.7.2  Wind  Data

2.8     Topography of the area

3        Hazard Identification

3.1     Material on Site

3.2     Chemical Properties

3.3     Reactions      

3.4     Licencing

3.5     Site Layout for Plant

3.6     Geographical Layout for Plant

3.7     Incidents/Accidents on Site 

3.8     Major accidents and incidents at related facilities

3.9     Safety System

4        Hazard Analysis

4.1     Scenarios to be modeled

4.2     Hazard Analysis

5        Process Safety Management  System

6        Consequence Analysis

6.1     Scenarios included in the Consequence Analysis

6.2     Process Data used in Modelling

6.3     Consequence Plots

6.3.1  Concentration Effects for toxic substances

6.3.2  Heat Radiation Effects for flammable substances

6.3.3  Over Pressure Effects for Explosive and Flammable Material

6.4     Consequence Scenarios modeled for the Plant Name

6.4.1  Equipment

6.4.2  The Equipment # 2 Effects

6.5     Domino Effects

6.6     MHI Classification

7        Frequency Analysis

7.1     PLANT SPECIFIC FAILURE DATA

8        Risk Calculations

8.1     The Individual Risk Contours

8.2     Risk Levels across the site

8.3     The F-N Curve       

9        Risk Judgement

9.1     The Public Risk Acceptance Criteria

9.2     The Employee Risk Acceptance Criteria

9.3     Societal Risk Acceptance Criteria

9.4     Societal Risk

9.5     Employee Risk

9.6     Risk Reduction

9.7     ALARP (As Low As Reasonably Possible)

10      Land Use Planning

10.1   Restricted Development Distance

10.2   Map plot showing restricted development zones

10.3   Conflicts for new developments 

10.4   Conclusions and Recommendations for Land Use Planning

11      Emergency Planning

11.1   Onsite Emergency Planning

11.2   Offsite Emergency Planning

11.3   Recommendations for the Sites Emergency Plan

12      Environmental

13      Conclusions and Recommendations

13.1   Hazardous Installations on Site

13.2   Maximum Extent of the 1% Lethality consequence

13.3   Risk Evaluation

13.4   Recommendations for Risk Reduction

13.5   Technical Assumptions

13.6   Land use planning