The safety analysis of Gen-IV lead-cooled fast reactors requires accurate evaluations for different operational and accidental conditions. The FRENETIC code, constituted by a full-core, multi-group nodal diffusion module coupled with a thermal-hydraulics one, allows to perform accurate transient calculations, but it is not suitable for the detailed parametric evaluations required by a thorough safety assessment. To fill this gap in the code performances, a non-intrusive reduced-order model reproducing an accurate approx- imation of the FRENETIC output with a reduced computational effort is proposed. The results obtained for a stand-alone neutronic transient involving the accidental insertion of a control rod show how the approach adopted is promising for computationally-efficient safety assessments.

A non-intrusive reduced order model for neutronic transient analyses of the ALFRED reactor / Abrate, Nicolo'; Dulla, Sandra; Pedroni, Nicola; Ravetto, Piero. - ELETTRONICO. - (2021), pp. 489-498. ((Intervento presentato al convegno Mathematics & Computation (M&C) 2021 tenutosi a Virtual Meeting.

A non-intrusive reduced order model for neutronic transient analyses of the ALFRED reactor

Nicolo Abrate;Sandra Dulla;Nicola Pedroni;Piero Ravetto
2021

Abstract

The safety analysis of Gen-IV lead-cooled fast reactors requires accurate evaluations for different operational and accidental conditions. The FRENETIC code, constituted by a full-core, multi-group nodal diffusion module coupled with a thermal-hydraulics one, allows to perform accurate transient calculations, but it is not suitable for the detailed parametric evaluations required by a thorough safety assessment. To fill this gap in the code performances, a non-intrusive reduced-order model reproducing an accurate approx- imation of the FRENETIC output with a reduced computational effort is proposed. The results obtained for a stand-alone neutronic transient involving the accidental insertion of a control rod show how the approach adopted is promising for computationally-efficient safety assessments.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2970482