Deactivation and Decommissioning (D&D) is the planned shut-down or removal of a plant or facility from the operation or usage that includes the process of safely closing a plant or facility to retire it from service after its useful life has ended. The Deactivation and Decommissioning Knowledge Management Information Tool (D&D KM-IT: Source: www.dndkm.org/) is a centralized web-based knowledge management information tool built for the D&D that is to improve efficiency by reducing the need to rediscover the knowledge and to promote reuse of the existing knowledge.

Reference Definition by Energy.gov: A Deactivation and Decommissioning (D&D) is the process of taking an active/excess/abandoned facility to a final disposition end state. Because of residual radioactivity, other hazardous constituents, and the physical condition of EM’s (Office of Environmental Management) facilities, D&D presents unique hazards that must be addressed from a safety, programmatic, environmental, and technological standpoint. The general D&D process applies to all facilities across the EM complex.

Related Definitions in the Project: The Operation and Maintenance; Project