1/16/2023 0 Comments Portsmouth paducah project office![]() The Oak Ridge Institute for Science and Education (ORISE), a DOE prime contractor, was contracted by the DOE Portsmouth/Paducah Project Office (DOE-PPPO) to conduct radiation dose modeling analyses and derive single radionuclide soil guidelines (soil guidelines) in support of the derivation of Authorized Limits (ALs) for 'DOE-Owned Property Outside the Limited Area' ('Property') at the PGDP. Department of Energy (DOE) at the Paducah Gaseous Diffusion Plant (PGDP), Paducah, Kentucky. = ,Įnvironmental assessments and remediation activities are being conducted by the U.S. Realistic parameters, such as the incinerator characteristics data, are used when available. This report provides a bounding dose analysis using scenarios described in PPPO document. For these reasons, dose modeling was conducted to demonstrate that using ANSI/HPS N13.12 more » screening levels as ALs for release of PGDP Freon meets the dose criteria set in U.S. Furthermore, while the ANSI N13.12 volumetric clearance values are used in the ALs, questions arose concerning whether the values are appropriate for materials of greater than 1 metric ton, and whether or not the ANSI N13.12 standard could be used for liquids that are sent to an incinerator. In addition, the inverse square rule was inadequately applied to the inhalation and ingestion pathways. A more appropriate evaluation would have considered the material as a cylindrical source for this pathway. For example, PPPO used the inverse square rule to estimate dose to the truck driver. However, questions arose regarding the assumptions made for the ANSI N13.12 clearance values, and whether or not all pathway doses were adequately considered in the Authorized Limits Request. ![]() A review of the proposed ALs document indicated that potential exposure scenarios from the release of Freon are adequately discussed therein. The Portsmouth/Paducah Project Office (PPPO) proposes to use the American National Standard Institute (ANSI)/Health Physics Society (HPS) N13.12 (ANSI 2013) volumetric screening levels as Authorized Limits (ALs) for the release of cryofluorane R-114 (Freon) at the Paducah Gaseous Diffusion Plant (PGDP) in Paducah, Kentucky. ![]()
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