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D&D Dictionary

Popular deactivation and decommissioning terms and their definitions.

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Listing: S

    Sampling and Analysis Plans

     If environmental samples are to be collected during a removal action, DOE must develop a sampling and analysis plan that provides a process for obtaining data of sufficient quality and quantity to satisfy data needs.

    Sanitary Waste

     Waste, such as garbage, that is generated by normal housekeeping activities and is not hazardous or radioactive. The waste is disposed of in sanitary landfills. Sanitary waste also includes liquids which are treated in sewage treatment plants.


     A geographic entity comprising leased or owned land, buildings, or other structures required to perform program activities.

    Site Inspection

    The collection of information from a CERCLA (Superfund) site to determine the extent and severity of hazards posed by the site. It follows a preliminary assessment and is more extensive.

    Solid Waste

     Non-liquid, non-soluble material ranging from municipal garbage to industrial waste that contains complex, and sometimes hazardous, substances. Solid waste also includes sewage sludge, agricultural refuse, demolition wastes, and residues.

    Solid Waste Management Unit

     Any discernible unit at which solid wastes have been placed at any time, irrespective of whether the unit was intended for the management of solid or hazardous wastes. Such units include any area at a facility where solid wastes have been routinely and systematically released.

    Source Material

     Uranium or thorium, other than special nuclear material or ores which contain by weight 0.05 percent or more of uranium or thorium, or any combination of these.

    Special Nuclear Material

     Plutonium, uranium enriched in the isotope 233 or in the isotope 235, and any other material which the U.S. Nuclear Regulatory Commission, pursuant to the provisions of Section 2071 of title 42 U.

    Surveillance and Maintenance

     These activities are conducted through-out the facility life cycle phase including when a facility is not operating and is not expected to operate again and continues until phased out during decommissioning. Activities include providing in a cost effective manner periodic inspections and maintenance of structures, systems and equipment necessary for the satisfactory containment of contamination and protection of workers, the public and the environment.


     A cutting tool having a thin, flat metal blade, band, or stiff plate with continuous cutting teeth along the edge. It is used mainly for cutting metals, wood or other hard materials. Usually saws have cutting blades with teeth, but some saws have   an abrasive diamond disk or steel cable-like blades; such saws are used to cut materials like stone and glass.
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