Tank characterization report for single-shell tank 241-BY-112

Baldwin, John H.

doi:10.2172/341242

Cited by 4 publications

(12 citation statements)

References 6 publications

(8 reference statements)

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“…Condensed phase samples from BY-108 showed no solvents in the top 50 cm of waste as shown in Section 2.1 of Campbell et al (1995) and Section 5.2 of Baldwin et al (1996). However, samples below 50 cm showed NPH and some tributyl phosphate (TBP).…”

Section: Speciation For Tank C-103 Is Recorded In Waste Tank Organimentioning

confidence: 96%

High priority tank sampling and analysis report

Brown¹

1998

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Section: Speciation For Tank C-103 Is Recorded In Waste Tank Organimentioning

confidence: 96%

High priority tank sampling and analysis report

Brown¹

1998

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“…Much of the supernate was removed and disposed of in soil columns. Baldwin et al (1996) list many transfers in and out of the tank,between 1951and 1982. From 1951to 1954, the initial waste stream was 5.5 megaliters (ML) of first-cycle decontamination'waste &om the bismuth-phosphate process.…”

Section: Fill Historymentioning

confidence: 99%

“…Tank BY-108 was classified as an assumed leaker in 1972 with an estimated leak of less than 20 E. While the reported tank volume has remained constant since 1982 at approximately 860 kL (Hanlon 1996;Baldwin et al 1996), Baldwin et al (1996) reports that drywell measurements indicate that "significant (radioactivity) was observed in the past (as expected from an assumed leaker)." Tank …”

Section: Fill Historymentioning

confidence: 99%

“…Segment 1 in Core 99 contained approximately 5 cm of solids and no drainable liquid. Baldwin et al (1996) described the material as a dirty white saltcake. Segment 2 contained 230 mL of an opaque yellow-green drahable liquid and approximately 5 cm of solids.…”

Section: Core Sampling Eventmentioning

confidence: 99%

“…water-content studies were taken from Baldwin et al (1996) [a) 3,700 pg/g detected in process blank.…”

Section: Compositionmentioning

confidence: 99%

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Organic tank safety project: Effect of water partial pressure on the equilibrium water contents of waste samples from Hanford Tank 241-BY-108

Scheele¹,

Bredt²,

Sell³

1997

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Portions of this document may be illegible in electronic image products. Images are produced from the best available original dOCUIIWlt, SummaryWater content plays a crucial role in the strategy developed by Webb et al. (1995) to prevent propagating or sustainable chemical reactions in the organic-bearing wastes stored in the 20 Organic Tank Watch List tanks at the U. S. Department of Energy's Hanford Site. Because of water's importance in ensuring that the organic-bearing wastes continue to be stored safely, Duke Engineering and Services Hanford commissioned the Pacific Northwest National Laboratory (PNNL) to investigate the effect of water partial pressure (Pwo) on the water content of organic-bearing or representative wastes. Of the various interrelated controlling factors affecting the water content in wastes, Pw0 is.the most susceptible to being controlled by the arid Hanford Site's environmental conditions and, ifnecessary, could be managed to maintain the water content at an acceptable level or could be used to adjust the water content back to an acceptable level.Of the various waste types resulting fiom weapons production and waste-management operations at the Hanford Site, Webb et al. (1995) determined that saltcake wastes are the most likely to require active management to maintain the wastes in a Conditionally Safe condition. A Conditionally Safe waste is one that satisfies the waste classification criteria based on water content alone or a combination of water content and either total organic carbon (TOC) content or waste energetics. To provide information on the behavior of saltcake wastes, two waste samples taken fiom Tank 241-BY-108 (BY-108) were selected for study, even though BY-108 is not on the Organic Tanks Watch List, because of their ready availability and their similarity to some of the organic-bearing saltcakes.In these BY-108 studies, PNNLkxposed waste obtained by Core 99 fiom the uppermost 5-cmsegment sample (Segment 1) and fiom the lower quarter portion of the next 48-cm-segment sample (Subsegment 2D) to water partial pressures of 2.2,7.6,18,27, and.29 torr at 30"C, the nominal temperature of the uppermost waste in BY-108. These water partial pressures encompass the minimum Pm0 observed at the Hanford Site between 1985 and 1995 and the higher water partial pressures that may exist in the tank.The water content was monitored until stabilized or appeared to be approaching a stable level, at which time the samples exposed to 2.2 and 29 torr were switched to determine whether hydration and dehydration had an effect on the retentive capabilities of these wastes and whether the samples had achieved a true equilibrium water content. The water contents were determined gravimetrically by drying in a 105°C oven until a stable mass was reached.Our studies indicate that, as expected,-the equilibrium water content of these saltcake wastes depends on the Pwo. Exposure to water parlid pressures ranging fiom 2.2 to 29 torr resulted in water contents in the homogenized Segment 1 sample ranging fiom 1 t...

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