The Continued Need for Modeling and Scaled Testing to Advance the Hanford Tank Waste Mission

Peurrung, Loni M. ; Fort, James A. ; Rector, David R.

Pacific Northwest National Laboratory (U.S.)

关键词: Modeling And Scaled Testing;    Hanford Tank Waste;    Tank Waste;    Fluid Dynamics;   

DOI  :  10.2172/1104630
RP-ID  :  PNNL-22626
RP-ID  :  AC05-76RL01830
RP-ID  :  1104630

美国|英语

来源: UNT Digital Library

【 摘 要 】

Hanford tank wastes are chemically complex slurries of liquids and solids that can exhibit changes in rheological behavior during retrieval and processing. The Hanford Waste Treatment and Immobilization Plant (WTP) recently abandoned its planned approach to use computational fluid dynamics (CFD) supported by testing at less than full scale to verify the design of vessels that process these wastes within the plant. The commercial CFD tool selected was deemed too difficult to validate to the degree necessary for use in the design of a nuclear facility. Alternative, but somewhat immature, CFD tools are available that can simulate multiphase flow of non-Newtonian fluids. Yet both CFD and scaled testing can play an important role in advancing the Hanford tank waste mission—in supporting the new verification approach, which is to conduct testing in actual plant vessels; in supporting waste feed delivery, where scaled testing is ongoing; as a fallback approach to design verification if the Full Scale Vessel Testing Program is deemed too costly and time-consuming; to troubleshoot problems during commissioning and operation of the plant; and to evaluate the effects of any proposed changes in operating conditions in the future to optimize plant performance.