Pore-Water Extraction Scale-Up Study for the SX Tank Farm

Truex, Michael J. ; Oostrom, Martinus ; Wietsma, Thomas W. ; Last, George V. ; Lanigan, David C.

Pacific Northwest National Laboratory (U.S.)

关键词: Vadose Zone;    Remediation;   

DOI  :  10.2172/1063731
RP-ID  :  PNNL-21882
RP-ID  :  AC05-76RL01830
RP-ID  :  1063731

美国|英语

来源: UNT Digital Library

【 摘 要 】

The phenomena related to pore-water extraction from unsaturated sediments have been previously examined with limited laboratory experiments and numerical modeling. However, key scale-up issues have not yet been addressed. Laboratory experiments and numerical modeling were conducted to specifically examine pore-water extraction for sediment conditions relevant to the vadose zone beneath the SX Tank Farm at Hanford Site in southeastern Washington State. Available SX Tank Farm data were evaluated to generate a conceptual model of the subsurface for a targeted pore-water extraction application in areas with elevated moisture and Tc-99 concentration. The hydraulic properties of the types of porous media representative of the SX Tank Farm target application were determined using sediment mixtures prepared in the laboratory based on available borehole sediment particle size data. Numerical modeling was used as an evaluation tool for scale-up of pore-water extraction for targeted field applications.