It is now becoming clear that relatively few U.S. Department of Energy (DOE) waste sites will be cleaned up to the point where they can be released for unrestricted use. "Long-term stewardship" (activities to protect human health and the environment from hazards that may remain at its sites after cessation of remediation) will be required for over 100 of the 144 waste sites under DOE control (U.S. Department of Energy, 1999). After stabilizing wastes that remain on site and containing them as well as is feasible, DOE intends to rely on stewardship for as long as hazards persistâ€"in many cases, indefinitely. Physical containment barriers, the management systems upon which their long-term reliability depends, and institutional controls intended to prevent exposure of people and the environment to the remaining site hazards, will have to be maintained at some DOE sites for an indefinite period of time. The Committee on Remediation of Buried and Tank Wastes finds that much regarding DOE's intended reliance on long-term stewardship is at this point problematic. The details of long-term stewardship planning are yet to be specified, the adequacy of funding is not assured, and there is no convincing evidence that institutional controls and other stewardship measures are reliable over the long term. Scientific understanding of the factors that govern the long-term behavior of residual contaminants in the environment is not adequate. Yet, the likelihood that institutional management measures will fail at some point is relatively high, underscoring the need to assure that decisions made in the near term are based on the best available science. Improving institutional capabilities can be expected to be every bit as difficult as improving scientific and technical ones, but without improved understanding of why and how institutions succeed and fail, the follow-through necessary to assure that long-term stewardship remains effective cannot reliably be counted on to occur. Long-Term Institutional Management of U.S. Department of Energy Legacy Waste Sites examines the capabilities and limitations of the scientific, technical, and human and institutional systems that compose the measures that DOE expects to put into place at potentially hazardous, residually contaminated sites.

This book demonstrates that the long-term safety of nuclear waste repositories, special waste disposal and carbon storage (CCS) is highly challenging and monitoring may contribute to substantiate evidence, support decision making and legitimise the programme. Deep geological disposal is a long-term safety issue and, in parallel, requires long-term institutional involvement of the technoscientific community, waste producers, public administrators, NGOs and the public. What, where and when to monitor is determined by its goal setting: It may be operational, confirmatory (in the near field) or environmental (far field). Strategic monitoring as proposed here contributes to process, implementation or policy and institutional surveillance. It not only addresses the controversial long-lasting “problem” (of nuclear, other toxic or CO2 waste) but investigates some ways to approach for “solutions” or solution spaces – not just technical but also institutional, societal and personal. It includes the tailored transfer of knowledge, concept and system understanding, experience and documentation to specific audiences above. It is an integrative tool of targeted yet adaptive management and may be applicable to other long-term sociotechnical fields.

Experience in IAEA member states has often shown that sites with radiation legacies cannot be remediated to residual levels of radioactivity below concern, and so cannot be released for unrestricted use. Residual contamination, buried wastes and other hazards may remain after cleanup is complete, for several reasons including technical limitations, economic feasibility, worker health and safety issues. This publication deals with the key conceptual, managerial and technical issues involved in the maintenance of institutional control over sites for prolonged periods of time, possibly for hundreds or even thousands of years. The management of sites with such long-term radiological liabilities is often referred to as 'stewardship'.