Investigation of Accelerated Casing Corrosion in Two Wells at Waste Management Area A-AX

Brown, Christopher F.; Serne, R. Jeffrey; Schaef, Herbert T.; Williams, Bruce A.; Valenta, Michelle M.; Legore, Virginia L.; Lindberg, Michael J.; Geiszler, Keith N.; Baum, Steven R.; Kutnyakov, Igor V.; Vickerman, Tanya S.; Clayton, Ray E.

doi:10.2172/859996

Cited by 5 publications

(10 citation statements)

References 10 publications

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“…As is found in most vadose sediments from the Hanford Reservation, there was very little (generally <0.1% by weight) organic carbon present. These values are quite typical and compare well with other samples collected from various locations around the Hanford Site (Serne et al 2004 a,b;Brown et al 2005). …”

Section: Radionuclide Content In Vadose Zone Sediment From Borehole Csupporting

confidence: 88%

“…The sediment in the Hanford formation H1 and H2 units was relatively low in calcium carbonate (<3 wt%), with little to no organic carbon. These values are quite typical and compare well with other RCRA borehole samples collected from other locations around the Hanford site (Serne et al 2004b for WMA T andBrown et al 2005 for WMA A-AX). …”

Section: Radionuclide Content In Vadose Zone Sediment From 299-e27-22supporting

confidence: 87%

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Characterization of Vadose Zone Sediments Below the C Tank Farm: Borehole C4297 and RCRA Borehole 299-E27-22

Brown¹,

Serne²,

Bjornstad³

et al. 2006

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Executive SummaryThe overall goal of the Tank Farm Vadose Zone Project, led by CH2M HILL Hanford Group, Inc., is to define risks from past and future single-shell tank farm activities at the Hanford Site. To meet this goal, CH2M HILL Hanford Group, Inc. tasked scientists from Pacific Northwest National Laboratory (PNNL) to perform detailed analyses on vadose zone sediments from within Waste Management Area (WMA) C. This report is the first of two reports written to present the results of these analyses. Specifically, this report contains all the geologic, geochemical, and selected physiochemical characterization data collected on vadose zone sediment recovered from borehole C4297, installed adjacent to tank C-105, and from borehole 299-E27-22, installed directly north of the C Tank Farm. This report also presents the interpretation of data in the context of sediment types, the vertical extent of contamination, the migration potential of the contaminants, and the likely source of the contamination in the vadose zone below the C Tank Farm. The information presented in this report supports the WMA A-AX, C, and U field investigation report in preparation by CH2M HILL Hanford Group, Inc.Sediments from borehole 299-E27-22 were characterized for their potential to be used as background (i.e., uncontaminated) sediments against which to compare contaminated sediments during the C Tank Farm characterization effort. Upon analysis of sediment samples from borehole 299-E27-22, elevated concentrations of chloride, nitrate, sulfate, phosphate, magnesium, calcium, strontium, and sodium were encountered at various depths within the borehole. Although no known spills have been recorded at the location where borehole 299-E27-22 was emplaced, the data strongly suggest the sediment has been contacted by a non-radiological waste stream. While the data from borehole 299-E27-22 are presented within this report, it is not recommended that the data be used holistically as background or baseline values for uncontaminated sediment. Instead, data from a companion report (Lindenmeier et al. 2002), which was an investigation of samples from borehole 299-E33-338, should be used for baseline comparisons.A core log was generated for both boreholes and a geologic evaluation of all core samples was performed at the time of opening. Aliquots of sediment from the borehole core samples were analyzed and characterized in the laboratory for the following parameters: moisture content, gamma-emitting radionuclides, one-to-one sediment:water extracts (which provide soil pH, electrical conductivity, cation, trace metal, and anion data), total carbon and inorganic carbon content, and 8 M nitric acid extracts (which provide a measure of the total leachable contaminant content from the sediment). Two key radioactive contaminants, technetium-99 and uranium-238, along with other trace metals were determined in acid and water extracts using inductively coupled plasma-mass spectrometry (ICP-MS). The laboratory tests provided the following conclusions regarding co...

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Section: Radionuclide Content In Vadose Zone Sediment From Borehole Csupporting

confidence: 88%

Section: Radionuclide Content In Vadose Zone Sediment From 299-e27-22supporting

confidence: 87%

Characterization of Vadose Zone Sediments Below the C Tank Farm: Borehole C4297 and RCRA Borehole 299-E27-22

Brown¹,

Serne²,

Bjornstad³

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…As is the case with most vadose sediments from the Hanford Site, there was very little (generally <0.15 wt%) organic carbon in the slant push samples. These values are quite typical and compare well with other samples collected from other locations around the Hanford Site (Serne et al 2004a, b;Brown et al 2005). …”

Section: Radionuclide Content In Vadose Zone Sediment From the C-152 supporting

confidence: 89%

“…Therefore, samples from a study completed near WMA A-AX are being included for reference. Two boreholes emplaced during the construction of groundwater monitoring wells at WMA A-AX, C4665, and C4257 contained average pore-water-corrected conductivities of 1.86 and 2.53 mS/cm, respectively (Brown et al 2005). Therefore, the pore water in the vertical sediment samples collected around the C-152 pipeline leak appeared to be as dilute with respect to the dissolved salts content as samples collected from uncontaminated boreholes near the A-AX Tank Farm.…”

Section: Ph and Ecmentioning

confidence: 95%

“…As mentioned in Section 4.1.1.1, sediment samples collected from the uncontaminated WMA C borehole (299-E27-22) contained elevated nitrate and were not truly indicative of uncontaminated conditions. Therefore, comparison of the average pore-water-corrected conductivity in uncontaminated boreholes from WMA A-AX (1.86 and 2.53 mS/cm from boreholes C4665 and C4257, respectively) (Brown et al 2005) vs. these samples from the slant probe hole pushes indicates that the vadose zone sediment contained elevated dissolved salts from approximately 13 to at least 80 ft bgs. …”

Section: Ph and Ecmentioning

confidence: 97%

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Characterization of Vadose Zone Sediments from C Waste Management Area: Investigation of the C-152 Transfer Line Leak

Brown¹,

Serne²,

Bjornstad³

et al. 2007

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Executive SummaryThe overall goal of the Tank Farm Vadose Zone Project, led by CH2M HILL Hanford Group, Inc., is to define risks from past and future single-shell tank farm activities at Hanford. To meet this goal, CH2M HILL Hanford Group, Inc., tasked scientists from Pacific Northwest National Laboratory to perform detailed analyses on vadose zone sediments from within waste management area (WMA) C. Specifically, this report contains all the geologic, geochemical, and selected physiochemical characterization data compiled on vadose zone sediment recovered from direct-push samples collected around the site of an unplanned release (UPR), UPR-200-E-82, adjacent to the 241-C-152 Diversion Box located in WMA C.UPR 200-E-82 was a waste-loss event near the 241-C-152 Diversion Box that occurred in December 1969 and involved the loss of approximately 2,600 gallons of cesium-137 recovery process feed solution (Wood et al. 2003). The leak event created a temporary ground-surface puddle measuring 100 gallons in volume, which was quickly covered over with clean gravel. It is estimated that 11,300 Ci of cesium-137, 18.3 kg of uranium, and 5.01 Ci of technetium-99 were released to the subsurface.An initial geologic/geochemical investigation in the vicinity of UPR-200-E-82 was performed using pairs of direct-push probe holes. A total of 41 vertical direct pushes extending to approximately 60 ft below ground surface (bgs) were completed between July and September 2005 to characterize vadose zone moisture and the distribution of contaminants. Twenty vadose zone sediment sample sets, containing one or two core samples in stainless-steel liners and one grab sample, were delivered to the laboratory for characterization and analysis. The sediments were collected around the documented location of the C-152 pipeline leak (UPR-200-E-82) and created an approximately 120-ft-diameter circular pattern around the waste site.A second series of six probe holes were emplaced around the site of the pipeline leak between March and June 2006. Unlike their 2005 vertical counterparts, these probe holes were driven at angles of 30º, 45º, or 60º from horizontal, and extended to approximately 80 ft bgs. Up to three sets of samples (1.5 ft of core plus material recovered from the drive shoe) were retrieved from each slant probe hole. The goal of this operation was to collect a sample at depth from directly beneath the projected site of the pipeline leak.A core log was generated for both sets of samples and a visual geologic evaluation of all liner samples was performed at the time of sample processing. Aliquots of sediment from the liners were analyzed and characterized in the laboratory for the following parameters: moisture content, gammaemitting radionuclides, one-to-one sediment:water extractions (which provided soil pH, electrical conductivity, cation, trace metal, and anion data), total carbon and inorganic carbon content, and 8-M nitric acid leaches (which provided a measure of the total leachable contaminant content in the sediment). Two key ra...

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Conceptual Model of Uranium in the Vadose Zone for Acidic and Alkaline Wastes Discharged at the Hanford Site Central Plateau

Truex

Szecsody

Qafoku

et al. 2014

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Investigation of Accelerated Casing Corrosion in Two Wells at Waste Management Area A-AX

Cited by 5 publications

References 10 publications

Characterization of Vadose Zone Sediments Below the C Tank Farm: Borehole C4297 and RCRA Borehole 299-E27-22

Characterization of Vadose Zone Sediments Below the C Tank Farm: Borehole C4297 and RCRA Borehole 299-E27-22

Characterization of Vadose Zone Sediments from C Waste Management Area: Investigation of the C-152 Transfer Line Leak

Conceptual Model of Uranium in the Vadose Zone for Acidic and Alkaline Wastes Discharged at the Hanford Site Central Plateau

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