This paper presents a pioneering application of Inverse Uncertainty Quantification (IUQ) methodology, proposed by CSNI/WGAMA in the SAPIUM activity, within the Severe Accident (SA) domain. Framed under the SEAKNOT-EU project, such a systematic approach has been used for uncertainty quantification of the Fission Product Release (FPR), particularly the cesium fractional one, as estimated by the MELCOR code. More than 60 experiments have been analyzed and some of them selected based on their completeness and representativeness, as recommended by the adequacy analysis. By using the IUQ CIRCE method, the so called Revised CORSOR-Booth model uncertainty range has been estimated and proved consistent with the database. Finally, the uncertainty characterization has been validated against on-line experimental data recorded in PHEBUS-FPT1.
Inverse uncertainty Quantification in the Severe accident Domain: Application to Fission Product release
Tinfena, G.;Angelucci, M.
;Paci, S.;Herranz, L. E.
2025-01-01
Abstract
This paper presents a pioneering application of Inverse Uncertainty Quantification (IUQ) methodology, proposed by CSNI/WGAMA in the SAPIUM activity, within the Severe Accident (SA) domain. Framed under the SEAKNOT-EU project, such a systematic approach has been used for uncertainty quantification of the Fission Product Release (FPR), particularly the cesium fractional one, as estimated by the MELCOR code. More than 60 experiments have been analyzed and some of them selected based on their completeness and representativeness, as recommended by the adequacy analysis. By using the IUQ CIRCE method, the so called Revised CORSOR-Booth model uncertainty range has been estimated and proved consistent with the database. Finally, the uncertainty characterization has been validated against on-line experimental data recorded in PHEBUS-FPT1.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
