Reactor;"Reflector (thickness, material)";"Effective delayed neutron fraction $, %";"Average neutron lifetime, ms";"Reactivity, $";+0.5;+1.1;"Tас, s" BREST;"0.5 m, Pb";0.36;0.0005;5.72;0.00128 VVER;–;0.65;0.1;5.80;0.11 CANDU;–;0.65;1.0;6.50;0.61 BREST;"4 m, Pb-208";0.36;+0.5;7.61;1.15