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    ABSTRACT This paper provides a summary of the planning, execution, and lessons learned from the first ever shipment of low-level radioactive waste (LLW) to the U.S. Department of Energy (DOE) Nevada Test Site (NTS) via intermodal shipping methods. On September 17, 2003, the DOE Portsmouth Gaseous Diffusion Plant (PORTS) at Piketon, Ohio became the first DOE site to complete a shipment of LLW to the NTS using a combined rail/truck shipping method. The shipment demonstrated the viability of the shipping method, the overall cost effectiveness and also provided early lessons that will help other DOE sites to quickly take advantage of the intermodal shipping opportunity. SITE BACKGROUND The 3,700-acre DOE PORTS facility is located in southern Ohio near Piketon, Ohio, approximately 22 miles north of Portsmouth, Ohio. The PORTS was constructed in the early 1950s to provide increased uranium enrichment capacity for national defense programs. The enrichment operations were designed to provide the higher end of U.S. government uranium enrichment capabilities, with typical product enrichments of between 4 and 5 percent for commercial uses and higher enrichments for U.S. Navy propulsion reactors. The primary structures at PORTS are three massive gaseous diffusion plant buildings containing a total of about 1,700 separation stages. The site also includes a more recent vintage gas centrifuge enrichment facility constructed in the late 1970s and early 1980s in which limited testing of gas centrifuge equipment occurred, but abandoned for potentially more economic processes prior to completion of construction. In the late 1980s, PORTS became subject to a site cleanup decree under the State of Ohio Resource Conservation and Recovery Act (RCRA) Corrective Action Program. Since that time, the site has completed environmental investigations and formal decision-making with the State of Ohio, instituted cleanup activities at most release sites, and initiated disposition of legacy wastes. Uranium enrichment activities are currently shutdown, and the plant is being maintained in cold standby. The primary mission of the DOE and its management and integration contractor, Bechtel Jacobs Company LLC (BJC), is remediation of the contaminated land and groundwater and disposition of legacy wastes, including both LLW, and mixed (both under the RCRA and the Toxic Substances and Control Act) low-level radioactive waste. A next generation gas centrifuge enrichment process will be installed and tested at PORTS over the next several years. A decision on decontamination and dismantlement of the old gaseous diffusion plant facilities has not yet been made
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