Uncertainty and covariances of the newly derived 8-groups delayed-neutrons abundances set

Daniela Foligno (1) , Pierre Leconte (1)

1 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

Delayed-neutrons are of great importance for reactor operations. Current abundances derive from either a measurement performed in 1957 by Keepin or by a summation calculation performed by Brady and England in 1989. In this work, a code has been written to compute a new set of delayed-neutron abundances as well as to estimate uncertainties and correlations through a Monte Carlo method and a Bayesian inference. An experiment will take place in the future to verify the validity of the calculated quantities.

Domaines: Physique [physics]

Daniela Foligno, Pierre Leconte. Uncertainty and covariances of the newly derived 8-groups delayed-neutrons abundances set. EPJ N - Nuclear Sciences & Technologies, 2018, 4, pp.31. ⟨10.1051/epjn/2018018⟩. ⟨cea-02305439⟩