MCNP model of L-54M nuclear research reactor: validation by preliminary graphite radiological characterization

  • Eros MossiniEmail author
  • Luca CodispotiEmail author
  • Giorgio Parma
  • Filippo Maria Rossi
  • Elena Macerata
  • Alessandro Porta
  • Fabrizio Campi
  • Mario Mariani


Since its shutdown in 1979, L-54M nuclear research reactor of Politecnico di Milano has been kept in safe storage configuration. In view of forthcoming decommissioning activities, many characterization activities have been performed on its matrices. Regarding the L-54M graphite stack, a neutron activation model was developed and validated by a graphite sampling and preliminary radiological characterization campaign focused on the most significant gamma-emitting radionuclides. Even if slightly underestimating the measured values, between − 5% and − 49% for 152Eu, between − 41% and − 67% for 154Eu, the simulated activity concentrations promisingly reproduce the experimental radial profile.


Decommissioning Radiological characterization AGOT graphite Neutron activation MCNP neutronic model Gamma spectrometry (HPGe) 



This work was presented at the 2nd International Conference on Radioanalytical and Nuclear Chemistry (RANC 2019) held in Budapest (H) on May 5th–10th 2019.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Eros Mossini
    • 1
    Email author
  • Luca Codispoti
    • 1
    Email author
  • Giorgio Parma
    • 1
  • Filippo Maria Rossi
    • 1
  • Elena Macerata
    • 1
  • Alessandro Porta
    • 1
  • Fabrizio Campi
    • 1
  • Mario Mariani
    • 1
  1. 1.Department of EnergyPolitecnico di MilanoMilanItaly

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