NSS regularly supplies high density (heavyweight) aggregates. mix designs and technical expertise to the country's largest and best known nuclear research facilities.

These include the Fast Flux Facility in Washington, Brookhaven National Laboratory in New York, Argon National Laboratory in Chicago, and Idaho, Bettis Atomic Laboratory in Pennsylvania, the Princeton Fusion Facility in New Jersey, Underground Test Site in Nevada, and the Los Alamos National Laboratory in New Mexico.