To obtain a 30 year life span, the SSTAR nuclear reactor design calls for a moveable neutron reflector to be placed over the column of fuel.
Jimmy Neutron: Boy Genius | Jimmy Neutron | Cassegrain reflector | Reflector sight | Parabolic reflector | Jimmy Neutron: Boy Genius (film) | reflector sight | Prompt neutron | Neutron Dance | Neutron cross section | Neutron activation analysis | neutron activation analysis | Multifaceted reflector | Jimmy Neutron (character) | High-Flux Advanced Neutron Application Reactor | Corner reflector |