Mercury cleanup: COLEX equipment deactivated at Y-12

Oak Ridge workers remove mercury and mercury-contaminated solids from process pipes in the column exchange, or COLEX, equipment at the Alpha-4 facility at the Y-12 National Security Complex. (Submitted photo)

Crews are nearly finished deactivating the second of three collections of old, mercury-contaminated equipment around the Alpha-4 facility at the Y-12 National Security Complex at Oak Ridge, a press release said.

The project addresses potential environmental risks and moves the U.S. Department of Energy Office of Environmental Management a step closer to preparing one of Y-12’s largest high-risk contaminated facilities for demolition, the press release said.

The column exchange, or COLEX, structures are connected to the four-story 500,000-square-foot Alpha-4 building, which was used for uranium separation from 1944 to 1945. Workers finished installing the COLEX equipment in 1955 for lithium separation, a process that required large amounts of mercury. A significant amount of the mercury was lost into the equipment, buildings, and surrounding soils, and its cleanup is one of EM’s top priorities.

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Demolition work at ORNL radioisotope lab could be complete this spring

A view of the demolition of a hot cell inside a protective cover at the former Radioisotope Development Lab at Oak Ridge National Laboratory. (Photo courtesy UCOR)

Demolition work at a former radioisotope laboratory in Oak Ridge could be complete this spring.

The U.S. Department of Energy Oak Ridge Office of Environmental Management and UCOR announced earlier this year that UCOR, a contractor, had begun removing the two remaining structures at the former Radioisotope Development Lab at Oak Ridge National Laboratory.

“This project launches our next phase of major demolition and cleanup at ORNL,” said Nathan Felosi, OREM’s portfolio federal project director for ORNL. “Our work is eliminating contaminated structures, like this one, that are on DOE’s list of high-risk facilities and clearing space for future research missions.”

Known as “hot cells,” the structures being demolished are heavily shielded concrete rooms that provided researchers protection from highly radioactive material during the years the laboratory was operational, a press release said.

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UCOR cleanup contract extended

The East Tennessee Technology Park (the former Oak Ridge K-25 Site), which is pictured above, is being cleaned up by UCOR for the U.S. Department of Energy. (Photo by UCOR)

The UCOR contract to clean up federal sites in Oak Ridge has been extended one year to July 31, 2021, and the consideration of a new cleanup contract won’t be considered until November 2020 at the earliest.

The UCOR contract could be extended one additional year, to July 31, 2022, using two six-month options, depending upon contractor performance and progress.

Before the extension, UCOR’s contract had been scheduled to expire July 31, 2020.

UCOR works on cleanup projects for the U.S. Department of Energy at the East Tennessee Technology Park, Oak Ridge National Laboratory, and Y-12 National Security Complex. The work includes the demolition of old, contaminated buildings that are no longer used. The cleanup work is called environmental management, or EM.

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Federal cleanup work in Oak Ridge moving to limited operations

In this photo published in early March, the U.S. Department of Energy said workers had begun taking down the second of four sections of the Centrifuge Complex at East Tennessee Technology Park in Oak Ridge. Completing this project will move DOE’s Office of Environmental Management closer to its goal of finishing all major demolitions at ETTP by the end 2020, the department said. (Photo courtesy U.S. Department of Energy Office of Environmental Management)

The cleanup work at federal sites in Oak Ridge is transitioning to limited operations today (Wednesday, April 1).

The transition applies specifically to the U.S. Department of Energy’s Oak Ridge Office of Environmental Management, or OREM. OREM oversees cleanup work at DOE sites in Oak Ridge, including East Tennessee Technology Park, Oak Ridge National Laboratory, and Y-12 National Security Complex.

“The safety and health of the EM workforce—federal and contractor employees—is the top priority of EM leadership across the complex,” DOE headquarters said in response to questions. “As a prudent response to the current situation regarding COVID-19 in Tennessee, effective on April 1, the Oak Ridge Office of Environmental Management is transitioning to limited operations. EM is choosing to take this action out of an abundance of caution.”

Activities that support DOE’s cleanup mission will be limited to those necessary to put projects into a status where they will ensure the safety of the public, workers, and the environment, the Energy Department said.

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DOE plans to demolish world’s oldest operating nuclear facility

Building 3019, the oldest operating nuclear facility in the world, is pictured above at Oak Ridge National Laboratory. (Photo courtesy U.S. Department of Energy Oak Ridge Office of Environmental Management)

The U.S. Department of Energy plans to demolish the oldest operating nuclear facility in the world.

The cleanup and demolition of Building 3019 at Oak Ridge National Laboratory could start sometime around 2030.

But the work won’t start until more than 500 canisters of uranium-233 stored in the building have been processed and removed, possibly by 2025.

More than 70 years old, Building 3019 was built during World War II as part of the top-secret Manhattan Project. That was a top-secret federal program to build the world’s first atomic bombs.

From 1943-1976, the building was used as a pilot plant to test radiochemical processes before they were used on a large scale at other nuclear facilities.

Now Building 3019 stores the nation’s inventory of uranium-233. Processing and removing that uranium is the top cleanup priority at ORNL because, among other things, storing the highly enriched fissile nuclear material increases security costs and creates nuclear safety issues. The cleanup work is being done by DOE’s Oak Ridge Office of Environmental Management and its contractor Isotek.

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