This paper describes design, calibration, and testing of a dual He-3 detector neutron backscatter gauge for use in the Savannah River Site Mixed Oxide Fuel project. The gauge is demonstrated to measure boron content and uniformity in concrete slabs used in the facility construction.

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A new capability for SRNL was developed to study fluid mechanics by passing a tracer through porous media within an X-ray Computed Tomography Scanner. This new capability will enhance SRNL's ability to describe the movement of liquids as they pass through glass, cement, fractured rock or soil.