Oak Ridge Today

Mercury cleanup: COLEX equipment deactivated at Y-12

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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

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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

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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

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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

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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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Demolition started on centrifuge site, largest remaining complex at ETTP

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Workers have 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 the U.S. Department of Energy’s Office of Environmental Management closer to its goal of finishing all major demolitions at ETTP by the end 2020. (Photo courtesy U.S. Department of Energy Office of Environmental Management)

Cleanup crews have started tearing down the largest remaining collection of buildings at the former K-25 site, which was built during World War II and enriched uranium for nuclear weapons and power plants through the Cold War.

The demolition work is occurring at the Centrifuge Complex at the K-25 site, now known as East Tennessee Technology Park or Heritage Center. The Centrifuge Complex is on the south side of ETTP. It includes the tall, white buildings visible from Highway 58.

Oak Ridge crews began demolishing the K-1200 section of the Centrifuge Complex in February. It’s the second of four sections.

Deactivation and demolition work in the first section of the complex was recently completed. That portion was a Manhattan Project facility built for research and development in 1944.

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‘Mud’ photography exhibit opens at K-25 History Center on Thursday

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The new K-25 History Center will be hosting “Mud, a Photographic Exhibition of Life in the Secret City.” The exhibit will open on Thursday, Feb. 27, 2020, and it will be available for viewing through the month of March. (Submitted photo)

The new K-25 History Center will be hosting “Mud, a Photographic Exhibition of Life in the Secret City.” The exhibit will open on Thursday, February 27, and it will be available for viewing through the month of March.

There will be a grand opening and ribbon-cutting ceremony for the K-25 History Center at 10:30 a.m. Thursday, February 27.

During World War II, Oak Ridge was a quickly built as a secret government town of 70,000 workers who lived in a camp-like environment of barbed wire, security checkpoints, and code words, a press release said. Workers were fingerprinted, interviewed, assigned a job, and given a clearance badge. Housing was limited and cramped and often unheated.

Oak Ridgers who ventured into Knoxville were easy to spot. The quickly constructed secret city was blanketed in a thick layer of mud. As a result, its residents’ muddy shoes were a dead giveaway as to their origin. “The muddy conditions of Oak Ridge during the war was a commonality that all residents, regardless of occupation, had to contend with,” the press release said.

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K-25 History Center to feature exhibits, artifacts, galleries

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K-25 History Center (Photo courtesy U.S. Department of Energy Oak Ridge Office of Environmental Management)


The K-25 History Center in west Oak Ridge will feature exhibits with more than 250 original artifacts and interactive galleries developed with help from almost 1,000 oral histories.

There will be a grand opening and ribbon-cutting ceremony for the K-25 History Center at 10:30 a.m. Thursday, February 27.

“The K-25 History Center was created to honor the amazing stories of the men and women who helped construct and operate the uranium enrichment complex that altered the global landscape during the Manhattan Project and Cold War,” the U.S. Department of Energy said.

The History Center is housed in 7,500 square feet of space on the second floor of the city-owned fire station at the former K-25 site, now known as Heritage Center. It was developed as part of a 2012 agreement that allowed DOE to demolish the North Tower of the former mile-long, U-shaped K-25 Building.

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K-25 History Center has grand opening this month

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The K-25 History Center will have a grand opening ceremony on Thursday, February 27.

The ceremony, which will include a ribbon-cutting, is scheduled for 10:30 a.m. Thursday, February 27, at 652 Enrichment Street in west Oak Ridge.

The K-25 site, now known as Heritage Center, was built during World War II to help enrich uranium for the top-secret Manhattan Project, a federal program to build the world’s first atomic bombs. K-25 helped enrich uranium for “Little Boy,” a nuclear weapon dropped over Hiroshima, Japan, on August 6, 1945, shortly before the end of World War II.

After the war, K-25 enriched uranium for nuclear weapons and commercial nuclear power plants through the Cold War. The site was shut down in the mid-1980s, and it is being cleaned up and converted into a private industrial park. The site’s large uranium enrichment buildings have been demolished and so have many of the support buildings. Most of the cleanup is expected to be completed this year.

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Updated: TerraPower, Isotek extracting cancer treatment materials from U-233 at ORNL

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DOE EM ORNL Pumping Uranyl Nitrate Solution into Resin Columns
TerraPower, a company that Microsoft co-founder Bill Gates helped launch in 2006, is working with Isotek Systems LLC, a federal cleanup contractor in Oak Ridge, to extract rare isotopes from nuclear materials for cancer treatment and research. Pictured above is a uranyl nitrate solution being pumped into resin columns. (Photo courtesy U.S. Department of Energy Oak Ridge Office of Environmental Management)

Note: This story was last updated at 10:30 a.m. Nov. 25.

A company that Microsoft co-founder Bill Gates helped launch in 2006 is working with a federal cleanup contractor in Oak Ridge to extract rare isotopes from nuclear materials for cancer treatment research.

The project will significantly increase the number of cancer treatment doses available each year, federal officials and company executives said Friday. It will help remove highly enriched fissile nuclear material from Oak Ridge National Laboratory and save taxpayers an estimated $90 million, the officials and executives said. And it will recycle an isotope that would otherwise be “irretrievably lost” as the nuclear material, uranium-233, is converted into a disposal-ready form.

The U.S. Department of Energy, Isotek Systems LLC, and TerraPower celebrated with an announcement of the project in Oak Ridge on Friday morning.

TerraPower, which is based in Bellevue, Washington, where Gates is chairman, is particularly interested in actinium-225. That isotope can be extracted from thorium-229. The thorium will be removed from the fissile material, the uranium-233 stored at ORNL, by the federal cleanup contractor, Isotek.

The unique agreement, a public-private partnership, is expected to allow TerraPower the ability to make 100 times more actinium-225-based cancer treatment doses per year than the 4,000 doses that are currently available worldwide. TerraPower could first offer actinium-225 in late 2020, company executives said.

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Preparing for demolition, workers removing asbestos, hazardous waste from Biology Complex

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Workers are preparing the six-story 9207 Facility for demolition at the Biology Complex at the Y-12 National Security Complex in Oak Ridge. The building has more than 256,600 square feet. (Photo courtesy U.S. Department of Energy Office of Environmental Management)

Workers are making significant progress removing asbestos and other hazardous waste from the Biology Complex at the Y-12 National Security Complex in a deactivation project that’s more than 60 percent complete, the U.S. Department of Energy said this week.

The work prepares the Biology Complex for demolition, possibly next year. The Biology Complex was originally built to recover uranium from process streams. It was later used for DOE’s research on the genetic effects of radiation from the late 1940s. When they operated, the facilities once had more people with doctorates than anywhere in the world, according to DOE.

Asbestos abatement teams from UCOR are working inside the six-story 9207 Facility and the three-story 9210 Facility. The first building is 256,600 square feet, and the second is 64,700 square feet.

“This project paves the way for EM (Environmental Management) to begin demolishing remaining buildings that comprise the Biology Complex next year,” the U.S. Department of Energy Office of Environmental Management said in an “EM Update” newsletter on Tuesday.

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Crews start demolishing ETTP Centrifuge Complex

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ETTP Centrifuge Complex Aerial View
Demolition work has started on the Centrifuge Complex at the front side of the East Tennessee Technology Park, the former K-25 site in west Oak Ridge. The work is part of the project to finish cleanup at ETTP by the end of 2020. (Photo courtesy U.S. Department of Energy Office of Environmental Management)

The largest and most visible buildings remaining at the East Tennessee Technology Park are being removed.

Demolition is under way on the Centrifuge Complex, according to the “EM Update” newsletter published last week by the U.S. Department of Energy Office of Environmental Management.

The demolition work is part of the project to finish cleanup at ETTP, the former K-25 site in west Oak Ridge, by the end of 2020. One of the three main sites in Oak Ridge, K-25 was built as part of the Manhattan Project, the top-secret federal program to build atomic weapons during World War II. The site continued to enrich uranium for nuclear weapons and commercial nuclear power plants through the Cold War. Its operations ended in the mid-1980s, and the site is now being converted into a private industrial park.

The Centrifuge Complex has more than 235,000 square feet, and sections of it reach heights of 180 feet. It was built in stages to develop and test centrifuge uranium enrichment technology, the “EM Update” said. The last of these facilities ceased operation in the mid-1980s.

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