December 8, 2022 | Author: Anonymous | Category: N/A
Safeti Saf eti Awa Awaren reness ess Course Course For National University of Singapore (NUS) Todd Yu 25 October 2019
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DNV GL DNV GL © 2019 2019
25 October 2019
SAFER, SMARTER, GREENER
Purpose of the course ▪
Have an overview overview of of Phast/Safeti Phast/Safeti software – What Phast Phast/Safe /Safeti ti can do do
– What are the inputs – What are the results ▪
Practise the the workflow of using Phast/Safeti Phast/Safeti software
– Build a small study – Run the study and view/analyse vi ew/analyse the results
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Today’s Agenda ▪
Phast Pha st Ove Overvie rview w
▪
User Interface
▪
Build a Study in Phast for Conseque Consequence nce Analysis Analysis
▪
Phast Pha st Re Resul sults ts
▪
Safeti Saf eti Ove Overvie rview w
▪
Build a Study in Safe Safeti ti for QRA QRA
▪ ▪
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Safeti Re Safeti Resul sults ts Help and Support
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Tools and Rules ▪
Tools – Introduction by using presentations
– Phast Phast/Safe /Safeti ti Softw Software are
▪
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Rules – Please feel free to ask questions at any times
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Phas Ph astt Ove Overvi rview ew
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Phast ▪
Phast (Process Hazard Analysis Software Tool)
▪
Phast Pha st can be be used used to:
– Estimate the magnitude of consequence consequences s – Review siting, layout, and design – Determine effects of modifications – Emergency preparedness –
Comply with regulations – Insurance estimations and negotiations
– Promote safety awareness – Start a QRA study 7
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Hazard Analysis using Phast Software ▪
Hazard analysis calculations in Phast in split spli t into 3 stages: 1. Discharge calculation calculations s Modelling the release from vessel or pipe
2. Dispersion calculations Modelling the behaviour of the released material (i.e. cloud or pool)
3. Effects calculation calculations s Predicting and modelling all the potential consequences (e.g. fire, explosion)
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Discharge
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Dispersion: near field
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Dispersion, far field
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Dispersion, different ambient conditions
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Effects (Fire, Explosion, Toxic)
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Phas Ph astt Ov Over ervie view w
Weather
Scenario
Discharge
Dispersion
Toxic
Radiation
Explosion
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User Interface
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Layout: Quick Access Toolbar ▪
Can be modified to include actions performed regularly, e.g. Run Models
▪
Right click on any function to add it to the quick access toolbar
▪
Can be displayed above or below the Ribbon
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Layout: Ribbon RIBBON
WORK SPACE
WORK AREA
LOG WINDOW
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The Ribbon
▪
▪
Consists of 7 main tabs that are always present: ➢
File
➢
Home
➢
Settings
➢
Tools
➢
Data
➢
View
➢
Help
Other tabs are context specific and are displayed only when applicable
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Ribbon: File tab ▪
Create a New Workspace
▪
Open an existing study file
▪
Open an example file
▪
Save, Save As
▪
Update “New workspace template”
▪
Close
▪
Preferences for temporary files, example files, and user interface settings
▪
Recent documents documents are listed l isted for easy access
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Ribbon: Home tab
▪
This tab includes actions most commonly performed ➢ ➢
Clipboard options: Cut, Copy, Paste Edit: Rename and Delete the selected item
➢
Navigate: show the GIS Input (Map) and Grid windows
➢
Calculation: Run ,Stop, Run Mode selection, Run in Parallel
➢
Results: Reports, Graphs, GIS graph
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Ribbon: Settings tab
▪
This tab includes tools for manipulating display of results, input, GIS display settings
– Styles and properties of features/results shown on GIS – Insert Equipment on GIS – Display Contours As Polygons
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Ribbon: Tools tab
▪
This tab includes tools for manipulating units of measure & language ➢ ➢
Search feature Unit of Measurement
➢
Pinpoint & Select on GIS
➢
Graph Wizard & Manage Templates
➢
Language selection
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Ribbon: Data tab
▪
This tab includes tools for manipulating data input & output tools ➢
CAD (insert AutoCAD or Micro-station drawing)
➢
Excel Import and Export
➢
Material data Import and Export
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Ribbon: View tab
▪
This tab includes tools for changing display views ➢
Toggle Full Window view on and off
➢
Select Current View for the workspace
➢
Switch windows, Cascade, Tile Horizontally or Vertically are currently disabled
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Ribbon: Help tab
▪
This tab includes access to the available help resources ➢
Methods for contacting DNV software via the Web
➢
References Reference s readily available online
➢
Information related to licensing and installed version
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Ribbon: Context sensitive
▪
For certain areas, the ribbon will have specific tools that will only be displayed when the pertinent features are enabled
▪
For example when you select the GIS Input tab in the Work Area, the GIS Input Tools tabs and a region with a new colour will be displayed above the ribbon tabs: ➢ GIS
Input Tools area is blue
➢ Two
new tabs are displayed: General and Input
➢ GIS
specific items such as zoom buttons and snapshot tools are displayed in the GIS tabs
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Layout: Workspace RIBBON
WORK SPACE
WORK AREA
LOG WINDOW
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Workspace
▪
This is where the model data, including scenarios, s cenarios, are added to the software Data input is driven through the Workspace
▪
Navigation Arrows
▪
Tabs
▪
▪
➢
Models
➢
Weather
➢
Parameters
➢
Materials
➢
Map
It is possible to change the workspace display
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Workspace: Icons means the system is processing the tree: the correct icons will appear when processing has finished.
In the top left hand corner indicates necessary data is missing.
Indicates the model ran successfully and results are available.
In the top right hand corner indicates a calculation error.
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Input Dialog icons Required fields are indicated by Red exclamation icons.
Any tab with a missing field is also indicated by a red exclamation icon.
Defaulted fields are indicated by a green arrow. Tabs containing fields which are all defaults also have a green arrow.
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Layout: Work Area RIBBON
WORK SPACE
WORK AREA
LOG WINDOW
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Work Area
▪
Input dialogs will be displayed on the work area when being edited By default, the GIS Input & Grid tabs are displayed
▪
The tabs on the work area can be re-ordered
▪
Multiple tabs along the top of the Map & Grid View allow for easy navigation
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Work Area: GIS Input ▪
Maps can be viewed/edited here
▪
Set scale & Origin
▪
Zooming Options
▪
Snapshot options
▪
Distance measure
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Work Area: Grid Input ▪
Easy method for viewing, adding and editing data from multiple models
▪
Can copy/paste from Excel for increased efficiency ➢
Fields must be exactly in the same order
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Layout: Log Window RIBBON
WORK SPACE
WORK AREA
LOG WINDOW
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Log Window: Output ▪
The Output Log is presented in the Log Window
▪
Ability to show/hide Errors, Warnings and Messages;
▪
The output text can be saved, printed, cleared and copied using the tools in the top left of the window
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Log Window: Search results ▪
Feature allowing for easier navigation of large studies
▪
Search results will display the path for the items containing the searched string
▪
Click the desired row to highlight that item in the work space
▪
Control & Click the desired row to open the selected item
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Unit its s - Sy Syst stem em Un ▪
The Units of Measure can be found in the Tools tab of the ribbon
▪
Various systems systems can be chosen or any combination will create a User system
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Units – Input fields ▪
▪
Units for data entry can be changed in the input dialogue box by clicking the hyperlink next to the input i nput field ➢ This
unit change is tempora temporary ry
➢ This
unit change is not reflected in graphs and reports
If the units you require are not present in the dialog list, enter the name of the desired unit.
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Build d a Study in Phast Phast for Conseque Consequence nce Analysis Analysis Buil
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Building a Phast model 1. Insert a Map (Raster image or CAD image) 2. Set up weathers 3. Insert materials or mixtures (if needed) 4. Insert equipment items (vessel, pipeline, standalones) 5. Insert scenarios (Continuous/I (Continuous/Instantaneous nstantaneous releases) 6. Run scenarios and view results ▪
Discharge results
▪
Dispersion results
▪
Effect results (T (Toxic oxic effect, radiation effect, Explosion effect)
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Inserting a Map ▪
Phast Pha st sup suppo ports rts::
– Raster Images: JPG, PNG, TIFF, etc. – Vector Images: e.g. CAD drawings, MicroStation, ArcView files, etc. ▪
It is helpful to see the results of your dispersion and consequence analysis overlaid on a map or plant layout diagram
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Inserting a Map Exercise: Insert Singapore SVY21 coordinate system
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Inserting a Map Exercise: Insert Singapore SVY21 coordinate system ▪
On Map tab, right click on the root and insert External Connection, select “Arcview “Arcview”, ”, browse to the folder where SVY21 coordinate system files are saved.
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Inserting a Map Exercise: Insert Singapore SVY21 coordinate system ▪
Insert a Feature Class under ArcView ArcVi ew Connection (inserted in previous step)
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Inserting a Map Exercise: Insert a Raster Image
Jurong Juron g isla island nd from Google Google Earth https://earth.google.com/web/@1.27971929,103.71032153,19.3404608a,204 https://earth.google.com/web/@1.27971 929,103.71032153,19.3404608a,2040.5475037d,35y 0.5475037d,35y,-0h,0t,0r ,-0h,0t,0r
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Inserting a Map Exercise: Insert a Raster Image ▪
Right click on “Raster Images” folder and insert a “Raster Image”.
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Inserting a Map Exercise: Insert a Raster Image ▪
Drag a box on the GIS Input view (any location, any size)
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Inserting a Map Exercise: Set Scale ▪
You can get scale data from Google Earth or other GIS system
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Inserting a Map Exercise: Set Scale ▪
Right click on the map and click on “Set Scale”
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Inserting a Map Exercise: Set Origin ▪
Right click on the map and click on “Set Origin”
20960, 23460
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Set Up Weathers ▪
Weathers Wea thers are used during discharge, dispersion and effects calculations
▪
Multiple weather conditions can be used for
▪
calculations Weather Wea ther inputs inputs include Pasquill stability class, wind speed, Ambient conditions, etc.
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Set Up Weathers Exercise: Set up weathers according to QRA Technical Guidance ▪
5.3 Weather (QRA Technical Guidance)
Weather categories F1, B2 and C3 should be modelled for each outcome. Category F1 represents Weather typical night time weather and categories B2 and C3 represent typical day time weather. weather.
– Humidity should be set to 85%. temperature should be assumed to be 30°C – Ambient temperature – Solar Radiation should be set as follows:
– Day time: 1000 W/m2 – Night time: 0 W/m2 In this session, QRA Technical Guidance is Singapore Technical QRA Guidance
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Set Up Weathers Exercise: Set up weathers according to QRA Technical Guidance ▪
Weathers can be defined in Weather tab.
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Insert Materials or create a Mixture ▪
Phast contains complete data for 66 pure components which are ready for use in calculations cal culations
▪
Additional components can be added to from the
▪
Reference database (DIPPR) or created manually Reference Mixtures can be created by mixing pure components
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Insert Equipment ▪
The Asset Hierarchy has been designed to have a realistic feel. (i.e. 1 Equipment with various possible failure scenarios under it)
▪
The Equipment and process conditions are defined once only (e.g. material, inventory, pressure & temperature)
▪
Available Equipment:
– Pressure Vessel – Atmospheric Storage Tank – Long Pipeline – Standalone – Warehouse
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Insert Equipment Exercise: Insert Hexane Tank and Chlorine Tank (dummy data)
Chlorine tank
Hexane tank
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Insert Equipment Exercise: Insert Hexane Tank and Chlorine Tank (dummy data) ▪
Hexane tank
▪
Chlorine tank
– Equipment type: Atmosphe Atmospheric ric Storage Tank
– Equipment type: Pressure Vessel
– Material: N-Hexane
– Material: Chlorine
– Volume Inventory: 400 m3
– Mass Inventory: 5,000 kg
– Temperature: 10 degC – Pressure: atmospheric pressure
– Temperature: 20 degC – Pressure: 5 barg
– Tank head: 10m
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Insert Equipment Exercise: Insert Hexane Tank and Chlorine Tank (dummy data) ▪
Check the box “Insert Equipment on GIS” (Settings tab)
▪
Insert Equipment under Study node (Models tab)
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Insert Equipment Exercise: Insert Hexane Tank and Chlorine Tank (dummy data) ▪
Input process data
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Insert Scenarios ▪
Multiple scenarios can be created under each equipment to represent different accidents
▪
Each scenario will take the process and equipment data from the Equipment item in the asset hierarchy and will only require the related data for the scenario (e.g. hole size, pipe length, etc). This will save a lot of time for users when building studies.
▪
Available Scenarios include:
– Instantaneou Instantaneous s release – Continuous releases (leak, line rupture, etc.) – Pipeline Breach – Liquid Spill – Standalone fires & Explosions –
Warehouse Fires 61
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Insert Scenarios Exercise: Insert Scenarios for Hexane Tank and Chlorine Tank (dummy data) ▪
3.1 Scenarios (QRA Technical Guidance)
Scenarios considered within the QRA should be identified by means of a systematic procedure. This should use available project documentation (e.g. process and instrumentation diagrams, process flowsheets, layout diagrams) to identify all significant inventories i nventories of hazardous materials. The list of scenarios to include in the QRA should comprise loss of containment of each inventory via: – Catastrophic failure (cold failure and hot failure/BLEVE)
– A suitable range of hole sizes (see Section 4.1.1.1). ▪
Hexane tank
▪
Chlorine tank
No.
Scenario
Hole size (mm)
No.
Scenario
Hole size (mm)
1
Small
75
1
Small
10
2
Large
250
2
medium
25
3
Catastrophic rupture
N/A
3
Large
75
4
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Phas astt Res Resul ults ts Ph
Catastrophic rupture
N/A
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Results Types
▪
Consequence Data table: table: list important consequence results in table
▪
Reports:: summary report and detailed reports Reports
▪
Graphs: various graphs for time varying discharge, dispersion and effect (toxic, fire, explosion) Graphs: results
▪
GIS:: dispersion and effect (toxic, fire, explosion) contours on GIS GIS
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Phast results: Discharge ▪
Mass flow rate & Release duration (continuous releases)
▪
Exit point conditions
▪
Atmospheric expansion results
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Phast results: Dispersion ▪
Cloud dimensions and concentratio concentrations ns at different times/locations
▪
Rainout, pool formation and pool vaporisation data at different times
▪
Cloud Max. Footprints at different heights
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Phast resul results: ts: Effects Effects overvi overview ew ▪
Phast calculates all of the possible consequence consequence types types for each scenario scenario
Effects
Flammable / Toxic?
Scenarios
Toxic Effect
Toxic
Toxic releases
Jett fi Je fire
Flam Fl amma mab ble
Con Co nti tin nuo uous us re rellea ease se ig ign nite ted d at at th the re relea ease se po poin intt (v (vap apou ourr frac fracttio ion> n>0) 0)
Fireball
Flammable
Instantaneous release or short-duration continuous release (less than 20s) ignited at the release point
Pool fire
Flammable
Pool is ignited
Flash fi firre
Flammable
Vapour cloud is ignited
VCE
Flammable
Vapour cloud is ignited in congested area
BLEVE
Both
On engineering judgement. Available as standalone model only
Flammable effects
Other
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Phast results: Toxic Effect ▪
Lethality levels at different distances
▪
Toxic concentration and Dose as a function of downwind distance
▪
Toxic lethality footprints
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Phast resul results: ts: Toxic Toxic Effe Effect ct Dispersion of toxic and flammable gases and vapours
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Phast results: Radiation Effect ▪
Possible flammable outcomes:
– Fireballs – Jet fires – Pool fires – Flash fires ▪
Radiation results available:
– Flame size and geometry – Radiation vs. distance data – Radiation ellipses
– Flash fire zones 70
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Phast resul results: ts: Radiatio Radiation n Effect Effect Accidental Jet Fires
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Phast resul results: ts: Radiatio Radiation n Effect Effect Intentional Jet Fires
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Phast resul results: ts: Radiatio Radiation n Effect Effect Fireballs
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Phast resul results: ts: Radiatio Radiation n Effect Effect Pool Fires
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Phast results: Explosion effect ▪
Vapourr Cloud explosion models: Vapou
– TNO Multi Energy – Baker-Strehlow-Tang – TNT ▪
BLEVE Blast
▪
Explosion results available:
– Explosion location, mass, and blast radius – Overpressure vs. distance – Pulse duration vs. distance
– Impulse vs. distance 75
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Phast resul results: ts: Explosio Explosion n effect effect Explosion Overpressure and Impulse
Created using Phast 3D Explosions
https://magazine.scientificmalaysian.com/issue-6 https://magazine.scientificm alaysian.com/issue-6-2013/enhancing-safet -2013/enhancing-safetyysustainability-malaysian-refineries/
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Harm Footprint with Consequence data table ▪
Section 6.1 of QRA Technical Guidance (Page 23-24):
The footprint dimensions should be modelled for each outcome and weather condition. This will typically define
– Maximum hazard distance (d) – Maximum width (mw) – Distance to maximum width (dmw) – Minimum distance (-d) that would represent an idealised footprint (Figure 5).
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Harm Footprint with Consequence data table ▪
Consequence data table in Phast
d
-d
mw
dmw
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Sa Safe feti ti Ov Over ervi view ew
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Commonly Used Definition of Risk
The
LIKELIHOOD and consequence of a specified undesired event occurring within a specified period or under specified circumstances
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Risk Management Workflow Identify Hazards
Postulate Accidents
Evaluate Consequences
Estimate Frequencies Risk Summation
Options to Mitigate
Options to Decrease
Consequences
Frequencies
No
Risks Managed? Yes
No
Optimise Options to Manage Risks
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Risk Management Workflow Identify Hazards
Postulate Accidents
Phast
Leak
Safeti Options to Mitigate
Options to Decrease
Consequences
Frequencies
No
Risks Managed? Yes
No
Optimise Options to Manage Risks
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Saf Safeti eti Ove Overvi rview ew
Societal Risk Wind Rose Weather
Toxic
Event Frequency
Scenario
Discharge
Dispersion
Radiation
e e r T t n e v E
Impact
n o i t a l u p o P
n o i t i n g I
Explosion
Individual Risk Vulnerability
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Buil Build d a Study Study in Safeti Safeti for QRA QRA
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Let’s Look at Safeti
Run Rows
Risk Tab
Super Tabs 85
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Data Needed in Safeti ▪
Release Scenarios and Frequencies
▪
Weather Data
▪
Population Data (for Societal risk only)
▪
Ignition Data (for delayed ignition probabilities calculations) cal culations)
▪
Risk Ranking Points (for risk analysis)
▪
Event Tree data
▪
Vulnerabilities
▪
Risk Contours Data for Risk Criteria
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Release Scenarios and Frequencies Additional Risk-specific Risk-specific inputs on Risk tab for each Scenario: ▪
Event frequency: Define how often an event is likely to happen
▪
Type of risk effects to model (Material Tab) ➢ Toxic
only ➢ Flammable only ➢ Toxic
and Flammable
▪
Non-ignition Non-ignitio n probabilities
▪
Immediate ignition probabilities ➢ Use
event trees
➢ Specify
directly
➢ Stationary ➢ Transport
– use material reactivity
(Road tanker/Tank wagon)
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Release Scenarios and Frequencies Exercise: Define Failure frequencies for current study ▪
Refer to Section 4.1 of QRA Technical Guidance
▪
Hexane tank
▪
No.
Scenario
Frequency (/ (/yr)
1
Small
1E-3
2
Large
1E-4
3
Catastrophic ru rupture
1.6E-5
Chlorine tank No.
Scenario
Frequency (/ (/yr)
1
Small
2.5E-05
2
medium
0.000324
3
Large
0.00028
4
88
Catastrophic rupture
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Weather Data ▪
The probability data for weather conditions and directions are used in the risk calculations
▪
The program performs risk calculations for each weather condition and wind direction, and applies the appropriate probability for that combination of condition and direction
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Weather Data Exercise: Set Up Wind Rose according to QRA Technical Guidance ▪
6.2.2 Weather (QRA Technical Guidance)
The splits used between weather categories F1, B2 and C3 should be specified and justified. Weather Weat her splits used should be tabulated. Direction bias data used should be specified and justified. Table Table 13 provides a set of weather weather data for F1, B2 and C3 derived from data provided by Singapore Met office.
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Weather Data Exercise: Set Up Wind Rose according to QRA Technical Guidance ▪
Wind Rose can be defined on Weather Weather folder
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Population Data ▪
Population Populatio n locations are directly put on the Map
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Ignition Data ▪
Used to specify delayed ignition probability and location
▪
Delayed Ignition locations are directly put on the Map
▪
A variety of ignition sources can be inserted for: ➢ General
ignition sources
➢ Electrical
sources of ignition
➢ Traffic/Transportation
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Ignition Data ▪
Delayed ignition probability at each point will be calculated based on: ➢ Presence ➢ Ignition ➢ In
factor (f)
Probability (ω) Presence factor = 0.8
time period (t)
Datum Point The ignition probability in 30s is 40% with of 0.8
−
,, = 1
,
∙ ,,
∙
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Ignition Data Exercise: define ignition source Road 1 0. 00
▪
0. 50
. km
Road 1
– Ignition probability: 0.2 – In time period: 10s – Traffic density: 120 /hr – Average speed: 12 m/s
Road 1
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Ignition Data Exercise: define ignition source Road 1 ▪
Right click on Ignitions folder (Risk tab) and Insert Transportation Transportation polyline.
▪
Draw multiple point on the map along Road 1, double click to finish
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Ignition Data Exercise: define ignition source Road 2 0. 00
▪
Road 2
– Ignition probability: 0.2 – In time period: 10s – Traffic density: 40 /hr – Average speed: 8 m/s
Road 2
0. 5
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Risk Ranking Points ▪
Risk Ranking points (RRP), are entered on the Risk tab of the study tree
▪
Located directly on the map
▪
Generates Individual Risk Ranking results which contain detailed break down of risk contributors to that location
▪
Any number of points can be used
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Risk Ranking Points Exercise: define two Risk Rank Points
Site
Control Room
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Event Tree data ▪
Refer to Sect Section ion 4.2 Event Event Trees Trees and Section 4.3 Event Tree Modifiers
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Vulnerabilities ▪
6.2.4.2 Fatality of QRA Technical Guidance
▪
In order to calculate individual risk of fatality to people, some of the outcomes should use a set of footprints with weightings applied to account for likelihood of fatality for each footprint within the set. The following weightings shall be applied to outcome frequencies for the respective footprints.
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Vulnerabilities Exercise: Define Vulnerabilities for IR Fatality ▪
Define Vulnerabilities Vulnerabilities in Vulnerabilities Vulnerabilities folder (Risk tab)
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Vulnerabilities Exercise: Define Vulnerabilities for IR Fatality ▪
Thermal radiation
▪
Change the radiation levels in Jet Fire parameters, Pool fire parameters, fireball parameters
▪
Change the vulnerabilities in Vulnerability nodes
Note: Values are for exercise only, only, to double check the compliance with the QRA Technical Technical Guidance Guida nce 103 DNV GL © 2019
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Vulnerabilities Exercise: Define Vulnerabilities for IR Fatality ▪
Flash Fire
Section 5.3.2 of QRA Technical Technical Reference
– Flash fires should be modelled to the lower flammable limit (LFL). – This is consistent with Table 14
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Vulnerabilities Exercise: Define Vulnerabilities for IR Fatality ▪
Explosion
▪
Similar method can be used to define the Vulnerabilities Vulnerabi lities for IR Injury (not include in this course)
Note: Values are for exercise only, only, to double check the complia compliance nce with the QRA Technica Technicall Guidance 105 DNV GL © 2019
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Risk Contours data for Risk Criteria ▪
7.2.1 IR (Fatality) (QRA Technical Guidance)
▪
The cumulative (for all outcomes indicated in Table Table 6) iso-contours for the relevant criteria (refer to Criteria Guidelines) are to be determined, based on footprints generated:
– 5x10-5 /year (example (example for Fixed Installation); Installation); – 5x10-6 /year (example (example for Fixed Installation). Installation). ▪
7.2.2 IR (Injury)
▪
The cumulative (for all outcomes indicated in Table Table 7) iso-contours for the relevant criteria are to be determined, based on injury harm footprints generated: generated:
– 3x10-7 /year (example (example for Fixed Installation). Installation).
– Refer to QRA Criteria Guidelines
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Risk Contours data for Risk Criteria Exercise: Set risk contours data ▪
Define the following risk levels in Settings tab > Risk Preferences > Contours
– 1E-3
– 1E-4 – 5E-5 – 5E-6 – 3E-7
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Organise the Study by Using Run Row ▪
A QRA is not an isolated study performed by a Risk Analyst
▪
A QRA is contributed to by a varied team
▪
Run row is used to organize the study
Project Info
structure and it should reflect the purpose of the study Structural Engineers
Schedulers ▪
Transport Supervisors
A run row is a combination of Release Cases, Weather Conditions, Population and
Facilities Engineers
Pipeline Engineers
Operators
Ignition, etc.
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Workforce
Others
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Run Row Example Run Row
Release Scenarios
Weather co conditions
Population
Ignition
Toxic Day
Toxic scenarios
Day Weather
Day Population
N/A
Toxic Night
Toxic scenarios
Night Weather
Night Population
N/A
Flammable Day
Flammable scenarios
Day We Weather
Day Po Population
Day ig ignition
Flammable Ni Night
Flammable sc scenarios
Night We Weather
Night Po P opulation
Night ig i gnition
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Exercise: Set up a Run Row ▪
Set up the row row(s) in Run Row Grid view
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Combination factors ▪
Combination factors are used to combine the risk results from different Run Rows to obtain total risk results for all times, effect types, locations etc.
▪
Located in the Combinations tab
▪
Can use up to 20 combinations
▪
Combinations can be renamed or duplicated
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Risk Results
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Exercise: Run the models and view results
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Individual Risk Results ▪
Risk contours
▪
Individual risk ranking grid
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Exercise: View Risk Contours
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Exercise: Check risk results against the criteria ▪
QRA Criteria Guidelines
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Exercise: View IR Ranking Grid for Two Risk Ranking Points
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Exercise: View IR Ranking Grid for Two Risk Ranking Points
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Societal Risk Results (Not requested by QRA Technical Guidance) ▪
F-N Curves
▪
Societal risk ranking grid
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Societal Risk Results (Cont’d) ▪
Population Populatio n category
▪
Category PLL
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Help and Support
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Context xt Sensiti Sensitive ve Help Help Phast Conte ▪
Phast built built-in -in help explain all the parameters paramete rs and inputs used for different models as well as some details about models and scenarios used in Phast
▪
It can be accessed by the Help button in all windows or through the Help tab in the Ribbon
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Technical Documentation ▪
Technical Documentation contains:
– Theory manuals and calculation calc ulation methods – Verification and validation documents
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DNV GL Software Customer Portal ▪
DNV GL Software Customer portal can be used to:
▪
Submit tech support cases and review old cases
▪
Find helpful documentation including historical User Conference Presentations and Status Notes, Release and Install Notes
▪
Read Frequently Asked Questions Can be accessed using button in Phast:
▪
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Global Technical Support Team (
[email protected] ) (
[email protected]) Huston, US
London, UK
Dubai, UAE
Kuala Lumpur, Malaysia
Shanghai, China
(UTC-6)
(UTC+0)
(UTC+4)
(UTC+8)
(UTC+8)
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References ▪
[1] Singapore QRA Technical Guidance https://www.nea.gov.sg/docs/default-source/ourservices/qra-technical-guidance_nov16.pdf
▪
[2] UK HSE Failure Rate Rate and Event Data for use within Risk Assessments (02/02/19) http://www.hse.gov.uk/landuseplanning/failure-rates.pdf
▪
[3] RVIM Reference Manual Manual Bevi Risk Assessments version 3.2 https://www.rivm.nl/docu https://ww w.rivm.nl/documenten/refe menten/reference-manual-be rence-manual-bevi-risk-a vi-risk-assessmentsssessments-version-32 version-32
▪
[4] Singapore QRA Criteria Guidelines https://www.nea.gov.sg/docs/default-source/ourservices/qra-criteria-guidelines_final_31aug16.pdf
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