Fuel Behavior Analysis by TRANSURANUS

                                                         Minimum number of Participants: 7

Lecturers and Code Instructors: M. Cherubini (NINE), P. Van-Uffelen (JRC-ITU)


                                                      Day 1

  • Brief overview of the Training Course
  • Nuclear fuel behavior under normal operation
    • Fuel characteristics modification
      • Geometrical
      • Thermal
      • Mechanical
  • Approach to nuclear fuel modeling
    • Set of equations
    • The TRANSURANUS approach
      • Main assumptions and limitations of the models
  • TRANSURANUS application to fuel rod nominal operation


                                                      Day 2

  • Nuclear fuel behavior under accident conditions: Loos of Coolant Accident (LOCA)
    • General overview of a LOCA scenario
  • Relevant phenomena occurring in LOCA scenario:
    • Clad overheating, PCT and Quench
    • Zr phase transformation
    • Clad Oxidation
    • Clad deformation (ballooning)
    • Hydriding
    • (Possible) clad rupture
    • Fuel fragmentation
    • Fuel dispersal (in case of clad rupture)
    • (Transient) Fission Gas Release
  • TRANSURANUS application to LOCA simulation


                                                      Day 3

  • Nuclear fuel behavior under accident conditions: Reactivity Initiated Accident (RIA)
    • General overview of a RIA scenario
  • Relevant phenomena occurring in RIA scenario (part1):
    • Boiling occurrence (depending on the power peak)
    • Clad Oxidation
    • Clad overheating and PCT
    • Zr phase transformation
    • Clad Quench
    • Hydriding
    • Pellet Clad Interaction / Pellet Clad Mechanical Interaction
    • (Transient) Fission Gas Release
    • (Possible) clad rupture
  • TRANSURANUS application to RIA simulation


                                                      Day 4

  • Safety aspects and concerns connected with nuclear fuel
    • Safety limits understanding and justification (from nuclear fuel perspective)
  • Overview of TRANSURANUS coupling
    • TH coupling for BIC derivation
  • TRANSURANUS application to selected problems
    • Modeling rodlet refabrication
    • High burnup structure
    • Ramp simulation


                                                      Day 5

  • Overview of experimental programs, facilities and databases related with nuclear fuel behavior
  • Sensitivity analysis by statistical method in TRANSURANUS
    • Theory
    • Hands-on training
  • Questions and Answers, Open Issues
  • Evaluation of the Training Course