- •Contents
- •1 An introduction to Safeti
- •What to Expect of this Tutorial
- •Starting the program running
- •The main window
- •Opening the Safeti examples file
- •The Risk Supertabs
- •The tabs in the Study Tree pane
- •The Models tab section
- •Level 1: the Workspace
- •Level 2: the Study
- •Level 3: the Equipment item
- •Level 4: the Scenario
- •The Weather tab section
- •The Parameters tab section
- •The Materials tab section
- •Pure Components
- •Mixtures
- •Warehouse Materials
- •The Map tab section
- •Bund types
- •Terrain types
- •Building types and Buildings
- •Raster Image Set
- •The Risk tab section
- •Categories
- •Ignitions
- •Populations
- •Vulnerabilities
- •Risk transects
- •Risk ranking points
- •Plant Boundaries
- •Viewing input data
- •The input dialog for the Propane Pressure Vessel Equipment item
- •The Grid View allows you to work on input data for multiple items
- •Running the consequence calculations and viewing the results
- •Running the calculations
- •Viewing the graphs for the Propane Scenarios
- •Viewing results on the GIS, against the background of map images
- •Viewing the Reports for the Catastrophic rupture Scenario
- •Summary group: Consequence Summary Report
- •Summary group: Flammable Hazards Report
- •Input group: Input Report
- •Equipment group: Discharge Report
- •Equipment group: Dispersion Report
- •Equipment group: Commentary Report
- •Equipment group: Averaging Times Report
- •Equipment group: Dynamic Fireball Report
- •Equipment group: Explosion Report
- •Running the risk calculations and viewing the results
- •Running the calculations
- •The list of available risk results
- •Viewing the risk results
- •Multi-Level risk contours for day and night combined
- •Multi-Row contours for a risk level of 1x10-6/AvgeYear
- •Category PLL societal risk results for day and night combined
- •2 Setting up your own analysis
- •The form of the analysis
- •The Equipment and Scenarios defined in the analysis
- •Creating a new workspace
- •Saving the workspace
- •The contents of a new workspace
- •Setting up the map image
- •Inserting the raster image
- •Ensure that there is a Raster Image Set in the Map tab section
- •Insert a Raster Image inside the Set
- •Placing the image in the GIS Input View
- •Setting the co-ordinates and size of the image
- •The location of the site on the map
- •Setting up Weather data for day and night
- •Creating a second Weather folder
- •Defining representative day-time weathers
- •Defining representative night-time weathers
- •Setting up the Run Rows
- •Creating a second Run Row
- •Setting the selection of Weather folders
- •Saving the changes to the workspace
- •3 Performing the consequence analysis
- •Defining the pressure vessel that contains a toxic material
- •Turn on the option to insert Equipment on the GIS
- •Insert a Pressure Vessel Equipment item
- •Setting the input data for the vessel
- •The Material tab section
- •The Geometry tab section
- •A Summary of the Input Data
- •Defining a catastrophic rupture scenario
- •Inserting the Scenario
- •Setting the input data
- •Elevation in Scenario tab section
- •Event frequency in Risk tab section
- •Run the calculations for the Scenario and view the results
- •Viewing the set of Graphs
- •Viewing outdoor toxic lethality results against the map
- •Defining the second Scenario: a liquid release from pipework
- •Insert a Time varying short pipe Scenario
- •Supplying the tank shape data for the Pressure Vessel
- •Setting the input data for the Scenario
- •Scenario tab section
- •Risk tab section
- •Material tab section
- •Short pipe tab section
- •Time varying releases tab section
- •Running the discharge calculations
- •Using the averaged discharge results to create a User-defined source Scenario
- •Inserting a Short pipe Scenario and set up the equivalent input data
- •Run the consequence calculations for the Short pipe and view the results
- •Defining the third scenario: toxic vapour from pipework
- •Defining three flammable releases
- •Setting the input data for the propane Equipment item
- •Copying the Equipment item
- •Changing the Material selection
- •Changing the coordinates
- •Running the consequence calculations and viewing the results
- •Jet Fire Graphs
- •Pool Fire Graphs
- •Fireball Graphs
- •Explosion Graphs
- •Flash Fire Graph
- •Defining toxic releases from a rail tank wagon
- •Inserting a Route Model
- •Defining the rupture and leak Scenarios
- •Copying the existing Chlorine Equipment item
- •Editing the Equipment item
- •Editing the Catastrophic rupture Scenario
- •Defining the liquid leak
- •Defining the vapour leak
- •Defining the rail route inside the site
- •Drawing the route on the GIS
- •Completing the input data for the route segment
- •Running the consequence calculations and viewing the results
- •Saving the workspace
- •4 Performing the risk calculations
- •Viewing the wind rose data for the Weather folders
- •Setting up the population data
- •Defining the night population data
- •Drawing the shapes
- •Using the Grid View to set the population values
- •Defining the day population data
- •Adding the shape for the school
- •Setting the population values
- •Setting up the ignition source data
- •Setting up the risk ranking point data
- •Defining the Models and Populations Playlists for the two Run Rows
- •Defining a Models Playlist for the Day Run Row
- •Defining a Models Playlist for the Night Run Row
- •Defining the Populations Playlists
- •Running the risk calculations and viewing the results
- •Comparing the Multi-Level Risk Contour Plots for Day and Night
- •Viewing the individual risk ranking results for the school
- •Viewing the societal risk results for day, night, and the whole year
- •Setting values for the Combination Factors
- •Viewing the FN Curve
- •Saving the workspace
- •What next?
A Summary of the Input Data
The dialog includes a large number of input fields, but the number of values that you have to enter in order to complete the data for this Pressure Vessel is very small, as shown in the table below:
Tab Section |
Input Field |
Value |
|
|
|
Material |
Discharge Material |
Chlorine |
|
|
|
|
Specify volume inventory? |
[checked] |
|
|
|
|
Volume inventory |
102 m3 |
|
|
|
|
Specified condition |
Temperature/bubble point |
|
|
|
|
Temperature |
10oC. |
|
|
|
Geometry |
East Co-ordinate |
198492 m |
|
|
|
|
North Co-ordinate |
435063 m |
|
|
|
Make sure you have set all of these values correctly, and then click on OK to close the dialog.
Defining a catastrophic rupture scenario
Now that you have defined the Pressure Vessel, you can define any number of different Scenarios underneath it. The Catastrophic rupture Scenario is defined here first, as it has the simplest set of input data.
Inserting the Scenario
Select the Pressure Vessel node, and then insert a Catastrophic rupture Scenario using either the rightclick menu or the Insert gallery in the Home tab of the Ribbon Bar.
The Scenario node will be added to the Study Tree immediately. You do not have to place Scenarios on the GIS Input View, as Scenarios take their Geometry data (i.e.their location) from the Equipment item to which they belong. When you insert a new Scenario, it is automatically added to the Models Playlist for the active Run Row, and you will see that the Scenario and the Pressure Vessel are shown as selected in the tree, i.e. the Pressure Vessel is no longer shown as greyed out.
You can leave the node with the default name of Catastrophic rupture. You will only be defining one Catastrophic Rupture Scenario for this Pressure Vessel so do not need to distinguish it from other Scenarios of the same type.
| SAFETI | April 2018 | www.dnvgl.com/software |
Page 35 |
