Class SISIntegratedRiskModel

java.lang.Object

neqsim.process.safety.risk.RiskModel

neqsim.process.safety.risk.sis.SISIntegratedRiskModel

All Implemented Interfaces:

Serializable

public class SISIntegratedRiskModel
extends RiskModel
implements Serializable

Risk model integrated with Safety Instrumented Systems (SIS).

Extends the standard RiskModel with SIS-specific features:

• SIF definitions and PFD calculations
• Residual risk after SIF mitigation
• Layer of Protection Analysis (LOPA) support
• SIL verification against risk targets

Example Usage

SISIntegratedRiskModel model = new SISIntegratedRiskModel("Process Risk Study");
model.setProcessSystem(processSystem);

// Add initiating events
model.addInitiatingEvent("Overpressure", 0.1, ConsequenceCategory.MAJOR);

// Add SIFs
SafetyInstrumentedFunction hipps =
    SafetyInstrumentedFunction.builder().name("HIPPS-001").sil(3).pfd(0.001)
        .protectedEquipment(Arrays.asList("Pipeline")).initiatingEvent("Overpressure").build();
model.addSIF(hipps);

// Calculate residual risk
SISRiskResult result = model.calculateResidualRisk();
System.out.println("Residual frequency: " + result.getResidualFrequency());

Version:

1.0

Author:

NeqSim Development Team

See Also:

• RiskModel
• SafetyInstrumentedFunction
• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SISIntegratedRiskModel.ConsequenceType	Consequence types for risk criteria.
static class	SISIntegratedRiskModel.IndependentProtectionLayer	Independent Protection Layer (IPL) for LOPA.
static class	SISIntegratedRiskModel.RiskToleranceCriteria	Risk tolerance criteria for SIL determination.

Nested classes/interfaces inherited from class RiskModel

RiskModel.Builder

Field Summary

Fields

Modifier and Type	Field	Description
private Map<String, List<SafetyInstrumentedFunction>>	equipmentSIFs	Mapping of equipment to protecting SIFs.
private Map<String, List<SafetyInstrumentedFunction>>	eventSIFs	Mapping of initiating events to mitigating SIFs.
private List<SISIntegratedRiskModel.IndependentProtectionLayer>	ipls	Independent Protection Layers (non-SIS barriers).
private static final long	serialVersionUID
private List<SafetyInstrumentedFunction>	sifs	List of SIFs in the model.
private SISIntegratedRiskModel.RiskToleranceCriteria	toleranceCriteria	Risk tolerance criteria.

Constructor Summary

Constructors

Constructor	Description
SISIntegratedRiskModel(String name)	Creates a SIS-integrated risk model.

Method Summary

Modifier and Type	Method	Description
void	addIPL(SISIntegratedRiskModel.IndependentProtectionLayer ipl)	Adds an Independent Protection Layer.
void	addSIF(SafetyInstrumentedFunction sif)	Adds a SIF to the model.
SISRiskResult	calculateResidualRisk()	Calculates residual risk after SIF mitigation.
int	determineRequiredSIL(String eventName, SISIntegratedRiskModel.ConsequenceType consequenceType)	Determines required SIL for an event to meet risk criteria.
List<SISIntegratedRiskModel.IndependentProtectionLayer>	getIPLs()	Gets all IPLs.
List<SafetyInstrumentedFunction>	getSIFs()	Gets all SIFs in the model.
List<SafetyInstrumentedFunction>	getSIFsForEquipment(String equipmentName)	Gets SIFs protecting specific equipment.
List<SafetyInstrumentedFunction>	getSIFsForEvent(String eventName)	Gets SIFs mitigating a specific initiating event.
SISIntegratedRiskModel.RiskToleranceCriteria	getToleranceCriteria()	Gets risk tolerance criteria.
LOPAResult	performLOPA(String eventName)	Performs Layer of Protection Analysis (LOPA) for an event.
void	setToleranceCriteria(SISIntegratedRiskModel.RiskToleranceCriteria criteria)	Sets risk tolerance criteria.
String	toJson()	Converts to JSON string.
Map<String,Object>	toMap()	Converts to map for JSON serialization.
Map<String, SILVerificationResult>	verifySILRequirements()	Verifies that SIFs meet required SIL for all events.

Methods inherited from class RiskModel

addConditionalEvent, addEvent, addInitiatingEvent, builder, getEvents, getInitiatingEvents, getName, runDeterministicAnalysis, runMonteCarloAnalysis, runSensitivityAnalysis, runSensitivityAnalysis, runSimulationBasedAnalysis, setFrequencyUncertaintyFactor, setProbabilityUncertaintyStdDev, setProcessSystem, setRandomSeed, setStoreMonteCarloSamples, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

sifs

private List<SafetyInstrumentedFunction> sifs

List of SIFs in the model.

equipmentSIFs

private Map<String, List<SafetyInstrumentedFunction>> equipmentSIFs

Mapping of equipment to protecting SIFs.

eventSIFs

private Map<String, List<SafetyInstrumentedFunction>> eventSIFs

Mapping of initiating events to mitigating SIFs.

ipls

private List<SISIntegratedRiskModel.IndependentProtectionLayer> ipls

Independent Protection Layers (non-SIS barriers).

toleranceCriteria

private SISIntegratedRiskModel.RiskToleranceCriteria toleranceCriteria

Risk tolerance criteria.

Constructor Details

SISIntegratedRiskModel

public SISIntegratedRiskModel(String name)

Creates a SIS-integrated risk model.

Parameters:

name - study name

Method Details

addSIF

public void addSIF(SafetyInstrumentedFunction sif)

Adds a SIF to the model.

Parameters:

sif - safety instrumented function

getSIFs

public List<SafetyInstrumentedFunction> getSIFs()

Gets all SIFs in the model.

Returns:

list of SIFs

getSIFsForEquipment

public List<SafetyInstrumentedFunction> getSIFsForEquipment(String equipmentName)

Gets SIFs protecting specific equipment.

Parameters:

equipmentName - equipment name

Returns:

list of protecting SIFs

getSIFsForEvent

public List<SafetyInstrumentedFunction> getSIFsForEvent(String eventName)

Gets SIFs mitigating a specific initiating event.

Parameters:

eventName - event name

Returns:

list of mitigating SIFs

addIPL

public void addIPL(SISIntegratedRiskModel.IndependentProtectionLayer ipl)

Adds an Independent Protection Layer.

Parameters:

ipl - the IPL

getIPLs

public List<SISIntegratedRiskModel.IndependentProtectionLayer> getIPLs()

Gets all IPLs.

Returns:

list of IPLs

calculateResidualRisk

public SISRiskResult calculateResidualRisk()

Calculates residual risk after SIF mitigation.

Returns:

SIS risk result

performLOPA

public LOPAResult performLOPA(String eventName)

Performs Layer of Protection Analysis (LOPA) for an event.

Parameters:

eventName - initiating event name

Returns:

LOPA result

determineRequiredSIL

public int determineRequiredSIL(String eventName,
 SISIntegratedRiskModel.ConsequenceType consequenceType)

Determines required SIL for an event to meet risk criteria.

Parameters:

eventName - event name

consequenceType - consequence type for criteria

Returns:

required SIL (0 if no SIF needed, -1 if SIL4 insufficient)

verifySILRequirements

public Map<String, SILVerificationResult> verifySILRequirements()

Verifies that SIFs meet required SIL for all events.

Returns:

verification results as a map (or null if no SIFs)

setToleranceCriteria

public void setToleranceCriteria(SISIntegratedRiskModel.RiskToleranceCriteria criteria)

Sets risk tolerance criteria.

Parameters:

criteria - tolerance criteria

getToleranceCriteria

public SISIntegratedRiskModel.RiskToleranceCriteria getToleranceCriteria()

Gets risk tolerance criteria.

Returns:

tolerance criteria

toMap

public Map<String,Object> toMap()

Converts to map for JSON serialization.

Returns:

map representation

toJson

public String toJson()

Converts to JSON string.

Returns:

JSON representation