The Impact of Higher Waste Loading on Glass Properties: The Effects of Uranium and Thorium

PDF Version Also Available for Download.

Description

In this study, glasses are designed or selected to assess the impacts of U3O8 and ThO2 on various glass properties of interest. More specifically, glasses were fabricated in which Th replaced U (on a molar basis) to assess the impact of ThO2 on the durability response (as measured by the Product Consistency Test ) and viscosity. Based on the measured normalized boron release values, the results indicated that the Th-enriched glasses were less durable than their Ubased counterparts. Although molar substitution of Th or U had a negative impact, all of the glasses were more durable than the Environmental Assessment ... continued below

Physical Description

vp.

Creation Information

Peeler, D.K. December 2, 2003.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

In this study, glasses are designed or selected to assess the impacts of U3O8 and ThO2 on various glass properties of interest. More specifically, glasses were fabricated in which Th replaced U (on a molar basis) to assess the impact of ThO2 on the durability response (as measured by the Product Consistency Test ) and viscosity. Based on the measured normalized boron release values, the results indicated that the Th-enriched glasses were less durable than their Ubased counterparts. Although molar substitution of Th or U had a negative impact, all of the glasses were more durable than the Environmental Assessment glass - the highest release being 7.39 g/L as compared to 16.695 g/L as reported for EA. With respect to model predictions, THERMOTM predicts that a molar substitution of thorium for uranium should increase glass durability. However, these data suggest that the signs and/or magnitudes of the Gi values associated with U3O8 and ThO2 are inconsistent with the theory on which the current model is based for the limited number of glasses tested. It should be noted that these glasses cover a narrow compositional region. With respect to the impact on viscosity, the data suggest that there may be a bias in the model. That is, the model currently does not contain a U3O8 or ThO2 term - but perhaps it should to account for their contributions to the measured (or actual) viscosity results. In addition, a series of glasses were produced to assess the impact of higher waste loadings on select glass properties. The PCT results suggest that durable glasses can be made at relatively high WLs (exceeding 40 wt percent). Comparisons between the measured PCTs and their predictions indicate that the current model is applicable, with all of the quenched glasses falling within the 95 percent confidence bands. The viscosity data for the higher WL glasses suggest that the current model may be extremely accurate for some systems but for different regions the model may be biased high or low - an observation that is consistent with that of Harbour et al. (1999).

Physical Description

vp.

Source

  • Other Information: PBD: 2 Dec 2003

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: WSRC-TR-2003-00386
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/820001 | External Link
  • Office of Scientific & Technical Information Report Number: 820001
  • Archival Resource Key: ark:/67531/metadc739213

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • December 2, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

Description Last Updated

  • May 5, 2016, 4:19 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 1
Total Uses: 3

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Peeler, D.K. The Impact of Higher Waste Loading on Glass Properties: The Effects of Uranium and Thorium, report, December 2, 2003; South Carolina. (digital.library.unt.edu/ark:/67531/metadc739213/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.