Hanford Supplemental Low Activity Waste Simulant Evaporation Testing for Removal of Organics

Nash, C. A.; Siegfried, Matthew; McCabe, Daniel J.; Fondeur, F. F.

doi:10.2172/1762790

Cited by 2 publications

(7 citation statements)

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“…The removal or destruction or organics from regulated waste is EPA's primary method to address treatment of organics under the LDR program. The scope of this task is to continue the evaluation of using SLAW stream evaporation for removing regulated organic chemicals as documented in the earlier work [Nash et al, 2021]. This would eliminate one impediment to enable a possible cementitious waste form.…”

Section: List Of Figuresmentioning

confidence: 99%

“…For the purpose of this effort, the list of 207 organic compounds in 1 were used to determine if the chemical could be readily removed from the tank waste using evaporation. Prior testing showed that methanol (H = 4.55E-06 atm-m 3 by differential evaporation from a Hanford LAW simulant [Nash et al, 2021]. This indicates that the methanol and any species with a higher H will likely be removed by evaporation.…”

Section: Assessment and Selection Of Regulated Organic Species For Evaluationsmentioning

confidence: 99%

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Potential for Evaporation and <em>In Situ</em> Reaction of Organic Compounds in Hanford Supplemental LAW

Nash

White

McCabe

2022

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Section: List Of Figuresmentioning

confidence: 99%

Section: Assessment and Selection Of Regulated Organic Species For Evaluationsmentioning

confidence: 99%

Potential for Evaporation and <em>In Situ</em> Reaction of Organic Compounds in Hanford Supplemental LAW

Nash

White

McCabe

2022

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“…Waste Treatment and Immobilization Plant (WTP) Processes The scope of this task is to continue the evaluation of using SLAW stream evaporation for removing regulated organic chemicals as documented in the earlier work [Nash et al, 2021]. This would eliminate one impediment to enable a possible cementitious waste form.…”

Section: List Of Figuresmentioning

confidence: 99%

“…For the purpose of this effort, the list of 207 organic compounds in 1 were used to determine if the chemical could be readily removed from the tank waste using evaporation. Prior testing showed that methanol (H = 4.55E-06 atm-m 3 /mol at 25⁰ C) was readily removed by differential evaporation from a Hanford LAW simulant [Nash et al, 2021]. This indicates that the methanol and any species with a higher H will likely be removed by evaporation.…”

Section: Assessment and Selection Of Regulated Organic Species For Ev...mentioning

confidence: 99%

“…If an "~x" appears, then the H for this chemical is between 4.55E-06 and 1.4E-06 atmm 3 /mol, so is below the proven limit for methanol but above the estimated limit value for separable by evaporation and further evaluation is needed to verify that it is removable by evaporation. Finally, the Note the H value listed is for the chemical at ambient temperature, typically in the range of 20 to 25⁰ C, and not the 42⁰ C associated with the previously reported evaporation limit (1.4E-06 atm-m 3 /mol) [Nash et al, 2021]. However, since data at 42⁰ C is not readily available for these compounds, the H at 25⁰ C was used to compare with the limit to evaluate if a compound is expected to be removed by evaporation.…”

Section: Assessment and Selection Of Regulated Organic Species For Ev...mentioning

confidence: 99%

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Potential for Evaporation and In Situ Reaction of Organic Compounds in Hanford Supplemental LAW

NASH¹,

Skeen²,

Miskho³

et al. 2022

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The presence of regulated organic species in Hanford nuclear tank waste is assessed in this report, along with fate of the organics and possible evaporative treatment. A narrowed list of regulated organic species of concern is developed based upon published analyses, chemical properties like aqueous solubility, and chemical reactivity under alkaline conditions. Published analyses include tank headspace and liquid samples, review of chemical reagents formerly used at Hanford, and the Tank Waste Information Network System (TWINS). This work supports possible stabilization of Hanford Supplemental Low Activity Waste (SLAW) by grouting.Revision 1 of this report includes information on a regulatory and processing Land Disposal Restriction (LDR) treatment variance strategy termed "Sample-and-Send". The Hanford Tank Operating Contractor, Washington River Protection Solutions, LLC (WRPS) has been developing this regulatory and processing LDR treatment variance strategy that relies, in part, on demonstrating that in situ decomposition reactions along with historic evaporation of tank waste has destroyed or removed many of the LDR organics (SRNL-STI-2020-00582, SRNL-STI-2021-00453). Under the Sample-and-Send concept, Hanford tank waste would be prepared to create a feed candidate tank that would then be sampled to confirm the waste acceptance criteria is met for a supplemental LAW cementitious treatment facility.a Phthalates may be present but are excluded from this list for reasons discussed in the document SRNL-STI-2021-00453Revision 1 vii

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Hanford Supplemental Low Activity Waste Simulant Evaporation Testing for Removal of Organics

Cited by 2 publications

References 10 publications

Potential for Evaporation and <em>In Situ</em> Reaction of Organic Compounds in Hanford Supplemental LAW

Potential for Evaporation and <em>In Situ</em> Reaction of Organic Compounds in Hanford Supplemental LAW

Potential for Evaporation and In Situ Reaction of Organic Compounds in Hanford Supplemental LAW

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