size is maintained, the reflector makes additional reactivity available for higher fuel burnup. The decrease in the critical size of core required is known as the reflector savings. Neutron reflectors reduce neutron leakage i.e. to reduce the neutron fluence on a reactor pressure vessel. Neutron reflectors reduce a coolant flow bypass of a core. Neutron reflectors serve as a thermal and radiation shield of a reactor core. See also Tamper (nuclear weapon) Neutron scattering Neutron supermirror External links Neutron reflectivity introduction (ISIS) reflector Nuclear weapon design Neutron