Stochastic Parameter Development for PORFLOW Simulations of the Hanford AX Tank Farm

Ho, Clifford K.; Baca, R.G.; Conrad, Stephen H.; Smith, Gary A.; Shyr, Lih-Jenn; Wheeler, Timothy A.

doi:10.2172/2759

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…1. (contd)Taken from Freeman's e-mail to George Last, dated 12/27/01 (finetex1a.doc and HStex1.doc).Taken fromHo, et. al., 1999 [Stochastic Parameter Development for PORFLOW Simulations of the Hanford AX Tank Farm].Taken fromKhaleel, et.…”

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confidence: 99%

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Three-Dimensional Modeling of DNAPL in the Subsurface of the 216-Z-9 Trench at the Hanford Site

Oostrom¹,

Rockhold²,

Thorne³

et al. 2004

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was contracted to improve the conceptual model of how CT is distributed in the Hanford 200 West Area subsurface through use of numerical flow and transport modeling. This work supports the U.S. Department of Energy's (DOE's) efforts to characterize the nature and distribution of CT in the 200 West Area and subsequently select an appropriate final remedy. Three-dimensional modeling was conducted to enhance the conceptual model of CT distribution in the vertical and lateral direction beneath the 216-Z-9 trench. Simulations targeted migration of dense, nonaqueous phase liquid (DNAPL) consisting of CT and co-disposed organics in the subsurface beneath the 216-Z-9 trench as a function of the properties and distribution of subsurface sediments and of the properties and disposal history of the waste. The geological representation of the computational domain was extracted from a larger Earthvision TM geologic model of the 200 West Area subsurface developed during fiscal year 2002. Simulations of CT migration were conducted using the Subsurface Transport Over Multiple Phases (STOMP) simulator, a multi-fluid flow and transport code developed by Pacific Northwest National Laboratory. • How does SVE affect the distribution of CT in the vadose zone? SVE effectively removes CT from the permeable layers of the vadose zone. SVE previously applied in the 216-Z-9 trench area has likely removed a large portion of CT initially present in the permeable layers within the large radius of influence of the extraction wells.

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confidence: 99%

“…2000 (Modeling Data Package for S-SX Field Investigation Report (FIR) [DRAFT]). Taken from Freeman's e-mail to George Last, dated 12/27/01 (finetex1a.doc and HStex1.doc) Ho, et. al., 1999.…”

mentioning

confidence: 99%

Three-Dimensional Modeling of DNAPL in the Subsurface of the 216-Z-9 Trench at the Hanford Site

Oostrom¹,

Rockhold²,

Thorne³

et al. 2004

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“…Future revisions of this database ought to address any disparity that might exist among samples. Estimates for longitudinal dispersivity were primarily taken from Ho et al (1999). Values for residual saturation (S r ) were calculated by dividing the raw residual water content (θ R ) by the raw saturated content (θ S ).…”

Section: Gravel Dominatedmentioning

confidence: 99%

“…Field measurements of dispersivity are extremely rare and small-scale laboratory measurements have only marginal utility in estimating field values (Meyer et al 2004). Estimates of longitudinal dispersivity for the composite analysis were primarily taken from Ho et al (1999). In the absence of data, dispersivity values are often based on simple guidelines related to the size of the computational elements in numerical simulation codes.…”

Section: Transport Parametersmentioning

confidence: 99%

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Vadose Zone Hydrogeology Data Package for the 2004 Composite Analysis

Freeman¹,

Cantrell²,

Fayer³

et al. 2004

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Investigating the effective resistivity of reinforced concrete waste storage tanks at the Hanford Site

Haas

Rucker²,

Levitt³

2021

GEOPHYSICS

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Industrialized sites pose challenges for conducting electrical resistivity geophysical surveys, as the sites typically contain metallic infrastructure that can mask electrolytic-based soil and groundwater contamination. The Hanford site in eastern Washington State, USA, is an industrialized site with underground storage tanks, piping networks, steel fencing, and other potentially interfering infrastructure that could inhibit the effectiveness of electrical resistivity tomography (ERT) to map historical and monitor current waste releases. The underground storage tanks are the largest contributor by volume to subsurface infrastructure and can be classified as reinforced concrete structures with an internal steel liner. Directly measuring the effective value for the electrical resistivity of the tank, i.e., the combination of individual components that comprise the tanks shell, is not reasonably possible because they are buried and dangerously radioactive. Therefore, we indirectly assess the general resistivity of the tanks and surrounding infrastructure by developing synthetic ERT models with a parametric forward modeling study using a wide range of resistivity values from 1×10−6 to 1×104 ohm-m, which are equivalent to steel and dry rock, respectively. The synthetic models used the long-electrode ERT method (LE-ERT), whereby steel cased metallic wells surrounding the tanks are used as electrodes. The patterns and values of the synthetic tomographic models were then compared to LE-ERT field data from the AX tank farm at the Hanford site. This indirect method of assessing the effective resistivity revealed that the reinforced concrete tanks are electrically resistive and the accompanying piping infrastructure has little influence on the overall resistivity distribution when using electrically based geophysical methods for characterizing or monitoring waste releases. Our findings are consistent with nondestructive testing literature that also shows reinforced concrete to be generally resistive.

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Stochastic Parameter Development for PORFLOW Simulations of the Hanford AX Tank Farm

Cited by 4 publications

References 7 publications

Three-Dimensional Modeling of DNAPL in the Subsurface of the 216-Z-9 Trench at the Hanford Site

Three-Dimensional Modeling of DNAPL in the Subsurface of the 216-Z-9 Trench at the Hanford Site

Vadose Zone Hydrogeology Data Package for the 2004 Composite Analysis

Investigating the effective resistivity of reinforced concrete waste storage tanks at the Hanford Site

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