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Severe Accident Analysis: Phenomenology and Computational Tools
  • Next Event:  NINE Headquarters, LUCCA (Italy), 27 September - 01 October 2021 
  • Early Registration deadline: 06 August, 2021   

MMARS - Severe Accident Analysis: Phenomenology and Computational Tools

Day 1
•    SA History and its relevance in safety analysis
      o    Short review of main historical severe accidents   
      o    Development of SA analysis approach in safety analysis
      o    Current relevance of the SA analysis
•    Phenomenology review
      o    In-vessel event progression (BWR/PWR)
      o    Ex vessel phenomena (PWR/BWR)
      o    CANDU and fuels channel reactor
      o    Special issue: SFP phenomena (loss of coolant, loss of cooling)


Day 2
•    SA analysis methodologies (deterministic, probabilistic)
•    Severe accident licensing
      o    IAEA
      o    Other organization
      o    Countries legislation
•    Severe accident codes (description and comparison)/1
      o    System codes
            -    SCDAP
            -    MELCOR
            -    MAAP

            -    ASTEC
      o    Containment codes
            -    Gothic
            -    Cocosys
            -    Smart
•    Code models (core and vessel simulation)
      o    Melcor application
      o    SCDAP application
      o    Nodalization, models set up and comparison of results


Day 3
•    Containment integrity
      o    Short term and long term actions
      o    Preventive actions in modern plant
      o    Mitigate actions in modern plant
•    Uncertainty analysis for severe accidents
•    Code Models (Containment Simulation):
      o    Melcor application
      o    Gothic application
      o    Nodalization, models set up and comparison of results


Day 4
•    Experimental tests for SA and code qualification
•    RadioNuclide (RN) release and source term
•    Code Models (RN release or ex vessel phenomena simulation or Spent Fuel Pool accident):
      o    Melcor application
      o    MAAP
      o    Nodalization, models set up and comparison of results


Day 5
•    Example of codes applications results
•    How to perform a SA analysis step by step: user and regulatory authorities point of view
      o    Needed data
      o    Code selection
      o    Nodalization detail and qualification
      o    Code running requirement
      o    Results evaluation and verification
•    Evaluation and Closure of the Training Course