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Graphite-Moderated Subcritical Reactor

subcritical reactor The NRL houses a graphite-moderated subcritical reactor utilizing natural-enrichment uranium. The subcritical reactor is used for lab classes and low-flux neutron irradiations.

The figure below shows the geometric arrangement of the fuel and moderator in the pile. The dots on the front face indicate fuel rods. Everything else is reactor-grade graphite. The source is inserted from the side in the eighth row of graphite. All of the fuel is above the source. The reactor is enclosed in a wood box with a cadmium sheet liner.


Length x Width x Height 68" x 68" x 9'
Fuel Type Natural Uranium
Graphite Dimensions 4" x 4" x 68"
Maximum Neutron Flux 104 n/cm2sec