Panel discussion role of a phenomenological validation and integral experiments for maturing the predictive simulations

E. Ivanov (1) , J. Baccou (1) , B. Rearden (2) , A. Boulore (3) , K. Velkov (4)

1 IRSN - Institut de Radioprotection et de Sûreté Nucléaire
2 ORNL - Oak Ridge National Laboratory [Oak Ridge]
3 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)
4 Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) mbH

Best Estimate Plus Uncertainty (BEPU) in its basis pretends on an exact use of high-fidelity simulations in a process of safety assessment. Despite on shared definition of BEPU has not been yet presented it seems to be a Decision Making (DM) support tool. BEPU needs, of course, in a consistent experiment-based UQ otherwise it could make a little sense for characterization of safety margins and, in its order, in safety assessment. Panel discussion stresses the needs to provide consistent system of criteria intended to prioritize existing IEs with respect to their impacts on VetUQ process. Given that IEs bring unique objective information inaccessible via differential experimentation one can see that to make this information useful IEs should be evaluated quantifying total uncertainties of each single IE and correlations between IE cases.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

E. Ivanov, J. Baccou, B. Rearden, A. Boulore, K. Velkov. Panel discussion role of a phenomenological validation and integral experiments for maturing the predictive simulations. ANS Best Estimate Plus Uncertainty International Conference (BEPU 2018), May 2019, Lucca, Italy. ⟨cea-02339874⟩