Russian forces shelled Kharkiv, forcing the nuclear subcritical installation (NSI) Neutron Source to lose its external power supply. It is now powered by generators. Source: press service of the State Nuclear Regulatory Inspectorate of Ukraine Quote: "Neutron Source, a nuclear subcritical installation based on subcritical assembly controlled by a linear electron accelerator, lost external power supply today at 08:30 during Russian troops' bombardment of Kharkiv," the report said.