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Energy and Environment,

Environmental Health and Remediation

Dawn Wellman


Manager
(509) 375-2017
Biography

Prior waste generation activities dating back to the 1940's nuclear weapons mission paired with the impact of contaminants in the environment have resulted in the necessary ability to make critical cleanup decisions. Pacific Northwest National Laboratory develops and delivers science-based and risk-informed solutions to make water, soil, and air cleaner. Our goal is to enable cleanup for complex challenges in waste processing and environmental remediation and stewardship with a depth of expertise and objectivity that promotes public confidence in the country's ability to manage the nuclear legacy and achieve environmental protection.

To achieve this, we are integrating our fundamental science-based understanding with applied research to deliver systems-based solutions. Our approaches enable predictive understanding of system performance for managing and monitoring residual DOE tank waste, waste processing, immobilization and disposal, environmental remediation, restoration, and stewardship (see interactive web feature). Equally important, we facilitate interactions with stakeholders, regulators, and the public by providing scientific and technical understanding necessary to provide solutions and inform the risks, liabilities, and economics of complex cleanup challenges as the nation strives to achieve environmental protection.

The Environmental Health and Remediation focus areas include: Chemical and Nuclear Processing, Subsurface Science and Engineering, Energy-Water Nexus, Radiation Measurements and Irradiation, Climate Change Modeling and Decision Science, Landscape Scale Management and Resilient Coastal Systems. We also are building capabilities through PNNL's Nuclear Process Science Initiative.

  • Separation Technique for Radioactive Technetium

    Separation Technique for Radioactive Technetium

    A tin-aluminum-phosphate composite synthesized by researchers at PNNL has separated troublesome pertechnetate—a difficult-to-immobilize chemical form found in the highly radioactive contaminant technetium-99 (Tc)—in alkaline nuclear wastes. Based on six months of testing, the results hold important implications for using these composites for immobilizing low-temperature waste forms.

  • An Award-Winning Subsurface Software

    An Award-Winning Subsurface Software

    A subsurface imaging software that combines supercomputing data analysis with real-time imaging and modeling capabilities was named one of the 100 most innovative scientific breakthroughs of the year. Real-time Four-Dimensional Subsurface Imaging Software—or E4D-RT—and its inventor, PNNL scientist Tim Johnson, were recognized November 3 at the R&D 100 Awards ceremony near Washington, D.C.

  • Targeting Technetium

    Targeting Technetium

    Technetium-99 is one of the toughest challenges faced by the Department of Energy in cleaning up millions of gallons of legacy nuclear waste at the Hanford Site in southeastern Washington State. PNNL researchers think they may have an answer in a promising technique would be to use metal organic frameworks or MOFs, to safely remove technetium-99 selectively from Hanford wastes.


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