11. Oktober 2018

Studentische Arbeit: Criticality calculations of debris bed models (english version only)

Criticality calculations of debris bed models for a risk assessment

The goal of the project „SBN-KEK“ is the evaluation of the criticality potential in debris beds which are formed after severe accidents in LWRs. The development of an exhaustive criticality database is one of the current R&D priorities for a safe decommissioning of the damaged Fukushima reactor units.

In this thesis, you will develop debris bed models for the most common in- and ex-vessel scenarios after a severe accident, as well as debris bed models that represent the current damaged reactors of Fukushima units 1, 2 and 3. The neutron multiplication factor (keff) will be then calculated for a wide range of parameters using the neutronic Monte Carlo code Serpent.

The final objective is to develop a criticality map and identify safety parameter ranges. These data will be used for a future criticality risk assessment.



  • Bachelor- or master student in engineering or similar studies
  • Knowledge of nuclear engineering
  • Basic programming skills
  • Very good English skills
  • Creativity and motivation


Starting: from November 2018 onwards


María Freiría López

Wissenschaftliche Mitarbeiterin / Doktorandin

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