Workshop “Users of Neutronic Codes for Nuclear Reactors Calculations” Date 14 September 2021, from 09.00 to 12:00h. Presentations Introduction and Program (Spanish) Diana Cuervo (UPM) – “Plataforma Multifísica UPM para LWR (Spanish)” Antonio Jiménez-Carrascosa (UPM) – “Processing of JEFF nuclear data libraries for the SCALE code system” Francisco Álvarez (CIEMAT) – “Usuarios de Códigos Neutrónicos para Cálculos de Reactores Nucleares: Capacidades de cálculo (Spanish)” Westinghouse Electric Spain – “Westinghouse capabilities in neutron codes for calculation of nuclear reactors”