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D&D Dictionary

Popular deactivation and decommissioning terms and their definitions.

Index:  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  : View all

Listing: G

    Graded Approach

     The depth of detail required and the magnitude of resources expended for a particular management element to be tailored to be commensurate with the element's relative importance to safety, environmental compliance, safeguards and security, programmatic importance, magnitude of the hazard, financial impact, and/or other facility-specific requirements.


     A construction material used to embed the reinforcing bars on the walls, connect sections of pre-cast concrete, fill voids, and seal joints. Grout is composed of water, sand, cement, color tint, and often fine gravel.


     A covering for hands having separate sections for each of the fingers and thumb. It protects and comforts hands against cold or heat, damage by friction, abrasion etc. Gloves are made of materials including cloth, knitted or felted wool, leather, rubber, latex, neoprene, and metal.

    Gamma Ray Imaging

     Gamma-ray imaging is a technique to capture the distribution of radioactive decay within a body or from a distant source by detecting the emitted gamma rays.

    Graphite Electrode

     A type of electrode that carries electricity to melt scrap iron and steel, in electric arc furnace and steel furnaces. Their size can vary up to 11 ft. long and 30 in. in diameter. They are made from petroleum coke after it is mixed with coal tar pitch, extruded and shaped, baked to carbonize the binder (pitch), and then graphitized by heating it to temperatures approaching 3000 °C that converts carbon to graphite.
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