CX-005512: Categorical Exclusion Determination

Radiation Mapping Dosimeter Exposure in Shielded Cell in 773-A: RadBall and GrayQb technologiesCX(s) Applied: B3.6Date: 02/10/2011Location(s): Aiken, South CarolinaOffice(s): Environmental Management, Savannah River Operations Office

Office of NEPA Policy and Compliance

February 10, 2011
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Radiation Mapping Dosimeter Exposure in Shielded Cell in 773-A: RadBall and GrayQb technologies
CX(s) Applied: B3.6
Date: 02/10/2011
Location(s): Aiken, South Carolina
Office(s): Environmental Management, Savannah River Operations Office

A radiation mapping dosimeter will be placed in a shielded cell in 773-A E-wing Shielded Cell Operations (SCO) facility for in-cell exposure to ambient radiation. Either the RadBall or GrayQb technologies will be selected for deployment; details of these two radiation mapping technologies are discussed below. --The RadBall consists of an inner spherical core made of a radiation sensitive polymer and an outer tungsten based collimation sheath. --The GrayQb is a alternate type of radiation mapping dosimeter. The GrayQb replaces the polymer component of the RadBall with metallic components. The unit is fabricated from tungsten, aluminum, and a small amount of copper. Stainless steel is also utilized in the design.

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