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CX-004445: Categorical Exclusion Determination

Waste Treatment Plant Secondary Waste Radioactive Fluidized Bed Steam Reforming (Module A)
CX(s) Applied: B3.6
Date: 10/25/2010
Location(s): Aiken, South Carolina
Office(s): Savannah River Operations Office

This work (Module A) involves performing the fluidized bed steam reforming (FBSR) process on caustic Defense Waste Processing Facility (DWPF) Offgas Condensate Tank (OGCT) in Savannah River National Laboratory High Level Caves (HLC), A-block. The DWPF OGCT radioactive condensate is being used to mimic a proposed Hanford Waste Treatment Plant Secondary Waste (WTP-SW) stream. Approximately 700 milliliters (mL) of caustic, concentrated OGCT will be fed to the process over the course of 7 individual 100-mL runs. This project will be conducted under a Hazardous Waste Treatability Study. The process operates at approximately 700 degrees Celsius and at -6 inches of water column pressure. The process will generate approximately 25 grams of solid sodium-alumino-silicate mineralized, granular product per run. This mineral product contains Resource Conservation and Recovery Act metals. The process also produces approximately 0.07 moles of gaseous nitrous oxide per run. Other constituents of the off-gas stream include carbon monoxide, carbon dioxide, hydrogen, water and nitrogen. Approximately 860 mL of steam condensate will also be produced per run. A maximum of 7 different 100-mL runs is anticipated. After the FBSR process has been applied to the DWPF OGCT, the granular product will be managed as hazardous waste.

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