Oak Ridge Today

Crews demolish ORNL reactor once used for aircraft nuclear propulsion research

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Demolition began in September 2022 on the Bulk Shielding Reactor at the Oak Ridge National Laboratory, and it was completed in November. It was the first teardown of a former reactor at the site. (Photo by U.S. Department of Energy Office of Environmental Management)

Workers have demolished a nuclear reactor that was built at Oak Ridge National Laboratory in the 1950s for studies that were part of the federal aircraft nuclear propulsion program.

It’s the first demolition of a reactor in the ORNL central campus area. The demolition was reported to be completed ahead of schedule.

The Bulk Shielding Reactor, also known as Building 3010, was built in the 1950s for radiation shielding studies as part of the federal aircraft nuclear propulsion program. It included a 27-foot-deep reactor pool filled with water to shield the radioactive components contained in the pool, according to the U.S. Department of Energy Office of Environmental Management. Its mission changed to a general-purpose research reactor in 1963, and it was shut down permanently in 1991.

The reactor was demolished by cleanup contractor UCOR, working for DOE’s Oak Ridge Office of Environmental Management (OREM).

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Crews prepare former ORNL reactors for demolition

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An aerial view of the central campus area at Oak Ridge National Laboratory that the Oak Ridge Office of Environmental Management will be transforming in the months ahead. Demolition is scheduled to begin on Building 3010 (front right) this fall followed by Building 3005 (back right) later this year. Crews are also conducting cleanup projects in Building 3042 (left). (Photo courtesy U.S. Department of Energy Office of Environmental Management)

The U.S. Department of Energy and cleanup contractor UCOR are preparing to demolish research reactor facilities at Oak Ridge National Laboratory.

Crews are nearing the final stages of deactivation inside two former research reactor facilities: the Bulk Shielding Reactor, known as Building 3010, and the Low Intensity Test Reactor, known as Building 3005, according to a newsletter published by DOE’s Office of Environmental Management. They are also beginning efforts at the Oak Ridge Research Reactor, known as Building 3042.

The work is overseen by DOE’s Oak Ridge Office of Environmental Management, or OREM.

These structures are located in the heart of ORNL, and their demolition will eliminate risks, clear land for research missions, and enhance access to a component of the Manhattan Project National Historical Park, the department said.

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DOE makes upgrades to Molten Salt Reactor Experiment

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An aerial view of the Molten Salt Reactor Experiment. The facility was shut down in 1973, and the Oak Ridge Office of Environmental Management is responsible for keeping it in a safe mode until its demolition is scheduled. (Photo courtesy DOE EM)

The U.S. Department of Energy is upgrading a historic reactor in Oak Ridge to keep the facility safe until it can be demolished.

The reactor, the Molten Salt Reactor Experiment, is at Oak Ridge National Laboratory, and it was shut down nearly 50 years ago. At some point, the MSRE will be deactivated, and that will save about $5 million in annual operating costs, a press release said.

The work is being overseen by the DOE Oak Ridge Office of Environmental Management.

“We have the important responsibility of keeping it safe until major cleanup operations begin,” said Nathan Felosi, EM’s ORNL portfolio federal project director. “The latest round of projects is making sure that’s the case and achieving considerable cost savings to taxpayers.”

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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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