Field lysimeter investigations: Low-level waste data base development program for fiscal year 1996. Annual report; Volume 9

McConnell, J.W.; Rogers, R. D.; Larsen, I.L.; Jastrow, J.D.; Sanford, W. E.; Sullivan, T.M.; Fuhrmann, M.

doi:10.2172/527460

Cited by 2 publications

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“…Modeling of the performance of cementitious materials for very long time frames in support of LLW disposal PAs has been a topic of specific interest for many years. For example, in the late 1980s and 1990s, the US NRC sponsored research directed at leaching of radionuclides from cementitious waste forms (McConnell et al 1997) and modeling the evolution and performance of cementitious barriers (e.g., Seitz andWalton 1992, Walton et al 1990). These earlier studies focused on specific mechanisms of aging of cementitious materials and approaches to model intact and degraded cementitious materials for PAs.…”

Section: Example Considerations For Modeling Cementitious Materialsmentioning

confidence: 99%

Solid Secondary Waste Data Package Supporting Hanford Integrated Disposal Facility Performance Assessment

Flach¹,

Kaplan²,

Nichols³

et al. 2016

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This data package provides recommendations for waste form physical and chemical properties to support the initial analysis of Solid Secondary Waste (SSW) disposals in the 2017 Integrated Disposal Facility (IDF) Performance Assessment (PA). At this time, specific formulations have not been identified for cementitious materials that will be used to encapsulate or solidify SSW, and no IDF-specific experiments were conducted to obtain data for the PA. Thus recommended property values are provided for a range of candidate materials, and based on a review of existing literature. Four key SSW streams were identified for emphasis due to expected inventories for contaminants of potential concern (COPC): HEPA filters, ion exchange resins, carbon adsorber beds and Ag-mordenite. Based on current disposal plans, compacted HEPA filters were considered as an encapsulated waste form and the other three key waste streams were assumed to be blended and solidified in a cementitious matrix. Considerations for alternative disposal methods were also addressed. The IDF PA team identified specific COPCs expected to be the key contributors for the PA calculations: Tc-99, I-129, Cs-137, Sr-90, uranium isotopes (and total uranium), chromium, mercury and nitrate. These species are the focus of this data package.

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Section: Example Considerations For Modeling Cementitious Materialsmentioning

confidence: 99%

Solid Secondary Waste Data Package Supporting Hanford Integrated Disposal Facility Performance Assessment

Flach¹,

Kaplan²,

Nichols³

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Diffusion coefficient values measured in laboratory testing of these waste forms were 9.6E-10 cm2/s for Sr-90 in portland cement and 6.OE-10 cm2/s for Cs-137 in portland cement (13). The Darcy velocities ranged from 2.%E-6 cm/s at ANL-E to 4.3E-6 cmis at O W L (7). The soil bulk density values were 1.55 g/cm3 at ANL-E and 1.60 g/cm' at ORNL (6).…”

Section: Source Term Modeling Of Lysimeter Releasesmentioning

confidence: 94%

“…Precipitation, air temperature, wind speed, and relative humidity were recorded continuously by the ANL-E and ORNL DAS during the experiment. The cumulative volume of leachate from the lysimeters since the inhiation of field work, and examples of the lysimeter soil temperature and moisture data from ANL-E and ORNL sites are found in Reference (7). Data recorded in FY-95 indicate that the lysimeter soil columns at both sites have remained moist durink the last reporting period.…”

Section: Experiments Descriptionmentioning

confidence: 99%

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Experiment close out of lysimeter testing of low-level radioactive waste forms

McConnell¹,

Rogers

Jastrow

et al. 1997

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any spccific commercial product, proc#s, or senrice by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors exprrsscd herein do not necessarily state or reflect those of the United States Government or any agency thereof. DISCLAIMER Portions of this document may be illegible electronic image products. Images are produced from the best available original document.

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Field lysimeter investigations: Low-level waste data base development program for fiscal year 1996. Annual report; Volume 9

Cited by 2 publications

References 0 publications

Solid Secondary Waste Data Package Supporting Hanford Integrated Disposal Facility Performance Assessment

Solid Secondary Waste Data Package Supporting Hanford Integrated Disposal Facility Performance Assessment

Experiment close out of lysimeter testing of low-level radioactive waste forms

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