Geochemical Model of Eh and pH Transitions in Pore Fluids during Saltstone and SDU Concrete Aging: Saltstone Disposal Facility PA Revision
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
The chemical and physical properties of the cementitious materials (dry cement, blast furnace slag, and fly ash) used to construct the Saltstone Disposal Units (SDUs) and saltstone waste form play a key role in the design and long-term performance of the Saltstone Disposal Facility. Chemical degradation of the reducing saltstone and concrete over time will impact radionuclide release and transport due to the changing chemical composition of groundwater (GW) percolating through the porous saltstone waste form. An equilibrium reaction path model was developed using The Geochemist’s Workbench® (GWB) software to estimate the timescales (expressed as number of pore volumes) for chemical degradation of the reducing cementitious materials as indicated by changes in redox potential (Eh) and pH.
- Research Organization:
- Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC09-08SR22470
- OSTI ID:
- 1480836
- Report Number(s):
- SRNL-STI--2018-00586
- Country of Publication:
- United States
- Language:
- English
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