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The 1.6 km-long building known as K25 took five years to demolish. Courtesy US DOE. A decades-long effort to clean and transform the former Oak Ridge Gaseous Diffusion Plant in the US state of Tennessee is complete, resulting in the first-ever removal and remediation of a uranium enrichment complex.

Since cleanup operations began, hundreds of buildings measuring more have been demolished and more than 1.2 million cubic metres of waste –enough to fill up more than 500 Olympic-size swimming pools – have been disposed, including nearly 30,000 truckloads of soil.

This progress has paved the way for the US Department of Energy’s Office of Environmental Management to transfer more than 500 hectares of land  at the facility, also known as the East Tennessee Technology Park, back to the community for economic development with another 40 hectares set aside for historic preservation.

In the 1940s, the Oak Ridge site produced enriched uranium to power the atomic weaponry that ended World War II.

Date: Friday, 16 October 2020
Original article: nucnet.org/news/decades-long-cleanup-complete-at-gaseous-diffusion-plant-10-4-2020

A decades-long effort to clean and transform the former Oak Ridge Gaseous Diffusion Plant has been completed, marking the first-ever removal of a uranium enrichment complex, the US Department of Energy (DOE) Office of Environmental Management (EM) has announced. The site in Tennessee has been transformed into a multi-use industrial park.

Date: Thursday, 15 October 2020
Original article: world-nuclear-news.org/Articles/Clean-up-of-US-enrichment-complex-is-completed

GE-Hitachi Global Laser Enrichment (GLE) and the US Department of Energy (DOE) have signed an amendment to their agreement for the sale of depleted uranium hexafluoride (UF6) inventories underpinning plans for a commercial laser enrichment facility at Paducah in Kentucky. Separately, the DOE has formalised how it plans to dispose of any waste depleted uranium oxides from its former gaseous diffusion enrichment plants.

Date: Tuesday, 09 June 2020
Original article: world-nuclear-news.org/Articles/DOE-amends-agreement-for-UF6-sale,-outlines-dispos

Russian state nuclear corporation Rosatom scheduled an auction for 14 April to select a contractor to decommission one of the buildings of Angarsk Electrochemical Plant (AECC) in Irkutsk.

Date: Wednesday, 15 April 2020
Original article: neimagazine.com/news/newsrosatom-launches-auction-for-angarsk-decommissioning-work-7871801

French nuclear fuel cycle company Orano has been authorised to begin dismantling the Georges Besse diffusion enrichment plant at the Tricastin complex in southeastern France. The plant was shut down in June 2012 following 33 years of service and was replaced by the centrifuge-based Georges Besse II plant.

Date: Wednesday, 19 February 2020
Original article: world-nuclear-news.org/Articles/Orano-to-start-dismantling-Georges-Besse-enrichmen

Work began on 23 May to demolish the last two buildings at the US gaseous diffusion uranium enrichment facility at Oak Ridge in Tennessee. Buildings K-131 and K-631, constructed in 1945, are the most contaminated structures still standing on the 890 hectare site, which hosted facilities constructed to support the Manhattan Project. Oak Ridge, which also produced enriched uranium for the commercial nuclear industry from 1945 to 1985, has been undergoing deactivation and decommissioning since the US Department of Energy (DOE) ended uranium enrichment in 1987. The site was then closed and re-named the East Tennessee Technology Park (ETTP). K-131 was built to provide uranium hexafluoride to the uranium enrichment cascade, while K-631 was used to withdraw gaseous depleted uranium from the cascade, convert it to liquid and transfer it into transport cylinders. Demolition has already begun on the five-story K-131, and the two-story K-631 will follow. The buildings, which are connected to one another and have a combined floor space of more than 83,000 square feet, are the most contaminated structures remaining at the site, the DOE Office of Environmental Management (OEM) said. Demolition of the two buildings by Oak Ridge Office of Environmental Management (OREM) and clean-up contractor UCOR is scheduled for completion this summer. All demolitions at ETTP are expected to be completed in 2020, when the site will be converted into a multi-use industrial park.  

Date: Tuesday, 28 May 2019
Original article: neimagazine.com/news/newsdemolition-of-us-gaseous-diffusion-facilities-begins-7230408

Work has begun to demolish the last two buildings that once supported the gaseous diffusion uranium enrichment process at Oak Ridge in Tennessee. Buildings K-131 and K-631 are the most contaminated structures remaining on the 2,200-acre (890 hectare) site.

Date: Thursday, 23 May 2019
Original article: world-nuclear-news.org/Articles/Final-Oak-Ridge-gaseous-diffusion-facilities-demol

The US Department of Energy's Office of Environmental Management (EM) has converted 5110 tonnes of depleted uranium hexafluoride (DUF6) to a more stable form from October to December 2018, following return to service of all seven uranium conversion production lines.

Date: Wednesday, 30 January 2019
Original article: neimagazine.com/news/newsus-depleted-uranium-conversion-underway-6956795

The return to service of all seven uranium conversion production lines enabled the US Department of Energy Office of Environmental Management (EM) to convert over 5000 tonnes of depleted uranium hexafluoride (DUF6) - more than half its yearly target - to a more stable form within the first three months of fiscal 2019.

Date: Friday, 25 January 2019
Original article: world-nuclear-news.org/Articles/US-DUF6-conversion-ahead-of-schedule

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