Overview on backfill materials and permeable reactive barriers for nuclear waste disposal facilities. Metadata

Metadata describes a digital item, providing (if known) such information as creator, publisher, contents, size, relationship to other resources, and more. Metadata may also contain "preservation" components that help us to maintain the integrity of digital files over time.

Title

  • Main Title Overview on backfill materials and permeable reactive barriers for nuclear waste disposal facilities.

Creator

  • Author: Moore, Robert Charles
    Creator Type: Personal
  • Author: Hasan, Ahmed Ali Mohamed
    Creator Type: Personal
  • Author: Holt, Kathleen Caroline
    Creator Type: Personal
  • Author: Hasan, Mahmoud A. (Egyptian Atomic Energy Authority, Cairo, Egypt)
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization

Publisher

  • Name: Sandia National Laboratories
    Place of Publication: United States

Date

  • Creation: 2003-10-01

Language

  • English

Description

  • Content Description: A great deal of money and effort has been spent on environmental restoration during the past several decades. Significant progress has been made on improving air quality, cleaning up and preventing leaching from dumps and landfills, and improving surface water quality. However, significant challenges still exist in all of these areas. Among the more difficult and expensive environmental problems, and often the primary factor limiting closure of contaminated sites following surface restoration, is contamination of ground water. The most common technology used for remediating ground water is surface treatment where the water is pumped to the surface, treated and pumped back into the ground or released at a nearby river or lake. Although still useful for certain remediation scenarios, the limitations of pump-and-treat technologies have recently been recognized, along with the need for innovative solutions to ground-water contamination. Even with the current challenges we face there is a strong need to create geological repository systems for dispose of radioactive wastes containing long-lived radionuclides. The potential contamination of groundwater is a major factor in selection of a radioactive waste disposal site, design of the facility, future scenarios such as human intrusion into the repository and possible need for retrieving the radioactive material, and the use of backfills designed to keep the radionuclides immobile. One of the most promising technologies for remediation of contaminated sites and design of radioactive waste repositories is the use of permeable reactive barriers (PRBs). PRBs are constructed of reactive material(s) to intercept and remove the radionuclides from the water and decontaminate the plumes in situ. The concept of PRBs is relatively simple. The reactive material(s) is placed in the subsurface between the waste or contaminated area and the groundwater. Reactive materials used thus far in practice and research include zero valent iron, hydroxyapatite, magnesium oxide, and others. As the contaminant moves through the reactive material, the contaminant is either sorbed by the reactive material or chemically reacts with the material to form a less harmful substance. Because of the high risk associated with failure of a geological repository for nuclear waste, most nations favor a near-field multibarrier engineered system using backfill materials to prevent release of radionuclides into the surrounding groundwater.
  • Physical Description: 27 p.

Subject

  • Keyword: Radioactive Wastes
  • Keyword: Radioactive Waste Disposal
  • Keyword: Air Quality
  • Keyword: Surface Treatments
  • Keyword: Ground Water
  • Keyword: Permeable Reactive Barriers (Prbs).
  • Keyword: Radioactive Materials
  • Keyword: Wastes
  • Keyword: Surface Waters
  • Keyword: Groundwater-Contamination.
  • Keyword: In Situ Remediation.
  • Keyword: Magnesium Oxides
  • Keyword: Contamination
  • Keyword: Water Groundwater-Contamination.
  • STI Subject Categories: 12 Management Of Radioactive Wastes, And Non-Radioactive Wastes From Nuclear Facilities
  • Keyword: Sanitary Landfills
  • Keyword: Hazardous Waste Site Remediation.
  • Keyword: Human Intrusion
  • Keyword: Nuclear Facilities-Waste Disposal.

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Report No.: SAND2003-2101
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/917140
  • Office of Scientific & Technical Information Report Number: 917140
  • Archival Resource Key: ark:/67531/metadc889578
Back to Top of Screen