Specialised PSA Courses

Interface between Level 1 and Level 2 PSA Plant Damage States (PDS)

• PDS characteristics and attributes
• PDS quantification

Accident Progression Analysis

• Containment failure modes
• Containment performance analysis
• Containment event trees

Phenomena during Severe Accidents

• Physics, modelling and quantification Release Categories and Source
  • Terms System Functions and Operator Actions

Quantification of Large Early Release Frequency (LERF) and Large Release Frequency (LRF)

Hands-on Practice using RiskSpectrum® PSA

• Development of containment event trees
• Quantification and Interpretation of Results

• Nuclear licensing and life cycle of a nuclear installation
• Overview of PSA Applications
• Introduction to ASME PRA Standard and PSA Capability Categories
• Introduction to IAEA-TECDOC-1511 (Determining the Quality of PSA for Applications)
• Overview of PSA Parameters (Risk Metrics/Measures used in Applications)
• Risk-informed Decision-making
• Probabilistic Evaluation and Rating of Operational Events Support NPP Upgrades, Back-fitting Activities
• Risk-informed Technical Specifications Optimisation Risk-based Configuration Control/Risk Monitors
• Risk-informed Categorisation of Structures, Systems and Components (SSCs)
• Risk Follow-up (Evaluation of Occurred Operational Events)

• Introduction to Seismic PSA Seismic PSA vs. Internal Events PSA Seismic PSA Methodology
• Modelling of Seismically Induced Initiators and Accident Sequences
• Using data from Probabilistic Seismic Hazard Analysis
• Seismic Fragility Analysis, Screening, Accident Sequence and Systems Logic Modelling
• System Modelling in Seismic Accident Sequences
• Seismic Risk Quantification with Characterisation of Uncertainties

Hands-on Practice deriving Seismic Input Data and using RiskSpectrum® PSA

• Screening process
• Use of fragility data
• Implementation of seismic hazard and fragilities into the PSA model
• Implementation of modified HEPs for seismic scenarios
• Development of seismic event trees
• Quantifications and results interpretation

Overview of HRA in PSA

Categories of Human Failure Events

• Pre-initiators
• Initiators
• Post-initiators

• Task analysis and performance shaping factors Quantification and HRA Methods (THERP, ASEP, HEART, SPAR-H, ATHEANA)

• Hands-on Practice using RiskSpectrum® HRA

Introduction to fire PSA based on NUREG 6850 methodology Steps Involved in Performing Fire PSA

• Plant boundary partitioning
• Component and cable selection
• Qualitative screening
• Fire ignition frequencies
• Quantitative screening
• Scoping fire modelling
• Circuit failure analysis and detailed fire modelling
• Human reliability analysis
• Quantification

Hands-on Practice using RiskSpectrum® PSA

• Modification of internal events PSA model for fire PSA
• Creation of internal fire event trees
• Implementation of modified human error probabilities (HEPs) for fire scenarios
• Quantification and results interpretation

Introduction to Flooding PSA

Tasks Involved in Performing Internal Flooding PSA

• Selection of flood areas and systems, components and structures
• Identification of flood sources
• Qualitative screening
• Characterisation of flood scenarios
• Flood initiating event frequency estimation
• Flood consequence analysis
• Flood mitigation – Human reliability analysis
• Modelling of retained flood scenarios
• Quantification and results interpretation

Hands-on Practice using RiskSpectrum® PSA

• Modification of internal events PSA model for flooding PSA
• Creation of internal flooding event trees
• Implementation of modified HEPs for flooding scenarios
• Quantification and results interpretation

Data Analysis

• Component failure modes and reliability models
• Component boundaries
• Choosing appropriate generic data source for each component
• Overview of data analysis (theory and best practice)
• Plant-specific data analysis and Bayesian analysis
• Homogenous and Non-homogenous analysis

Analysis of Dependent Failures

• Physical and functional dependencies, basic definitions
• Dependency defences against dependencies

Common Cause Failure (CCF) Analysis

• Examples of CCFs faced by industry, including more susceptible components
• General overview of the alpha, beta and MGL models
• International data references for CCF data and CCF parameters
• Modelling aspects in software and limitations

Hands-on Practice using RiskSpectrum® PSA

• Reliability models and reliability parameters
• Modelling of CCFs in RiskSpectrum®
• Modelling of maintenance