Impact of delayed neutron constants on reactivity effects measured in a fast reactor Antonín Krása, Anatoly Kochetkov, Nadia Messaoudi, Alexey Stankovskiy, Guido Vittiglio and Jan Wagemans EPJ Web Conf., 211 (2019) 03004 Published online: 05 June 2019 DOI: 10.1051/epjconf/201921103004