United States Nuclear Regulatory Commission - Protecting People and the Environment

Reflector

A layer of material immediately surrounding a reactor core that scatters back (or reflects) into the core many neutrons that would otherwise escape. The returned neutrons can then cause more fissions and improve the neutron economy of the reactor. Common reflector materials are graphite, beryllium, water, and natural uranium.

Page Last Reviewed/Updated Wednesday, May 07, 2014