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D&D Industry News

Keep up with deactivation and decommissioning industry news and current events.

FIU has successfully completed a Design & Development of Convolutional AutoEncoder algorithm to identify cracks in D&D mock-up facility

December 23, 2020

ML Task.pngConvolutional AutoEncoder (CAE) architecture developed by the FIU team

Florida International University has successfully completed a Design & Development of Convolutional AutoEncoder algorithm to identify cracks in D&D mock-up facility. ​This task supports structural health monitoring of D&D facility to identify cracks and structural defects for surveillance and maintenance. Structural health monitoring is imperative to the ongoing surveillance and maintenance (S&M) across the DOE complex. Deep Learning algorithms provide state-of-start technologies capable of facilitating the assessment of structural integrity in aging nuclear facilities. The FIU team has implemented a robust solution for anomaly detection as part of the structural health monitoring system.

The anomalies are defects (cracks) on D&D concrete structures . The proposed architecture uses a Convolutional AutoEncoder (CAE) – deep learning approach followed by an image post processing routine to generate an anomaly heat map of the predicted defects in the input images. This approach provides a robust solution by training on defect-free wall images for anomaly detection in an unsupervised learning manner.


Abstract: In this paper, we have proposed a semi-supervised based anomaly detection mechanism, which involves a convolutional auto-encoder, to facilitate the structural healthcare monitoring of DOE infrastructure. In this regard, the cracks and spalling are considered as the anomalies on the concrete structures, whereas the normal/healthy surfaces of the concrete structures are considered and grouped as the normal class. We employ an unsupervised learning methodology for training the model, as it only takes the normal class image datasets as its input data. After the model is trained, the proposed “semi-supervised” anomaly detection approach does not require any prior knowledge of the concrete defects. It traces the possible anomalies/defects with the least involvement of the domain experts.

Click link below to read full paper.

Task 6 - Structural Health Monitoring Deliverable_2020_P3_D2_Report_FINAL.pdfTask 6 - Structural Health Monitoring Deliverable_2020_P3_D2_Report_FINAL.pdf

DOE, FIU Welcome New Fellows Into Program Shaping Cleanup Workforce

January 06, 2021

DOE and Florida International University (FIU) officials recently introduced FIU science, technology, engineering, and math (STEM) students as the new DOE Fellows Class of 2020 in a virtual ceremony. Top row, from left, Fellows Brendon Cintas, Eduardo Rojas, Stevens Charles, and Sebastian Story; second row, from left, Fellows Christian Dau, Joel Adams, Ryan Ocampo, Phuong Pham, and Christian Gonzalez Lopez; third row, from left, Fellows Josue Estrada, Alicia Maratos, Adrian Muino, and Lorryn Andrade, and FIU Applied Research Center Executive Director Inés Triay; fourth row, from left, EM Minority Serving Institutions Partnership Program Manager Genia McKinley, Fellow Thi Tran, FIU DOE Fellows Program Director and Director of Research Dr. Leonel Lagos, DOE Fellows Program Manager Ravi Gudavalli, and DOE Office of Legacy Management (LM) Site Manager Jalena Dayvault; and fifth row, from left, LM Director Carmelo Melendez, Fellow Olivia Bustillo, Class of 2019, Fellow Aurelien Meray, and Fellow Gisselle Gutierrez-Zuniga, Class of 2019.

MIAMI  DOE and Florida International University (FIU) officials recently introduced the EM Fellows Class of 2020 — 15 science, technology, engineering, and math (STEM) students inducted into a program intended to shape future candidates for the cleanup workforce.

The FIU students join current fellows in the university’s Science & Technology Workforce Development Program, also known as the DOE Fellows program. An additional FIU STEM student was inducted as a DOE Office of Legacy Management (LM) Fellow.

Undergraduate and graduate minority STEM students at FIU are usually welcomed into the program annually in a ceremony hosted at FIU’s Modesto Maidique campus. This year, due to health and safety concerns in the wake of the COVID-19 pandemic, the event was held virtually.

The Fellows program strives to attract, train, and retain the next-generation workforce in nuclear, engineering, science, and construction fields to assist in addressing EM's many long-term scientific and basic research needs, and complex cleanup challenges.

Students in the Fellows program work with DOE scientists and researchers at FIU’s Applied Research Center (ARC) — which celebrates its 25th anniversary this year — to learn about EM and LM technical areas of need.

In an address during the ceremony, EM Associate Principal Deputy Assistant Secretary for Field Operations Nicole Nelson-Jean reflected on her experience in a similar mentorship program, which helped steer her on the path to a successful federal government career.

Nelson-Jean stressed the importance of such programs to the environmental missions of EM and LM. She commended the DOE Fellows program’s success stories, highlighting former DOE Fellows hired by DOE and its national laboratories, including EM’s Savannah River National Laboratory.

Gisselle Gutierrez-Zuniga, who was inducted into the program last year as an undergraduate student, delivered a message to the new Fellows highlighting her personal experience, which she found fulfilling academically and professionally. Also participating was LM Director Carmelo Melendez, who delivered a keynote address to the new DOE Fellows.

Since its inception in 2007, the Fellows program has inducted 179 STEM students mentored in research, development, and deployment of new cleanup technologies. The Fellows program has resulted in a 95% hiring rate for students who complete the program, including three Fellows hired by DOE, nine by DOE contractors or national laboratories, 19 hired by other government agencies, and 74 hired by the STEM industry.

“FIU continues to train and mentor future leaders,” said DOE Fellows Director Dr. Leonel Lagos, the DOE-FIU Cooperative Agreement’s principal investigator. “This program provides the opportunity for many first-generation students to complete their degrees at FIU, obtain hands-on research and work experience, and participate in internships across the DOE complex.”

-Contributors: Ravi Gudavalli, Angelique Lawrence, Genia McKinley​


Oak Ridge's UCOR Earns 98% of Fee for Second Half of Fiscal 2020

January 06, 2021

UCOR completed demolition on the final structures at the East Tennessee Technology Park (ETTP) during the performance evaluation period of April 2020 through September 2020. Pictured is Building K-1600, the final structure to fall at ETTP. It was previously used for centrifuge technology research and development.

OAK RIDGE, Tenn.  EM recently awarded Oak Ridge cleanup contractor UCOR $28 million for its performance from April 2020 through September 2020, amounting to 98% of the available fee for the evaluation period.

The Oak Ridge Office of Environmental Management (OREM) issued its fee determination scorecard for UCOR for the second six-month period of fiscal 2020 after completing its evaluation of the contractor.

EM releases information relating to contractor fee payments — earned by completing work called for in the contracts — to further transparency in its cleanup program.

The contractor received “excellent” ratings for project management and business systems, quality and safety culture, and regulatory and stakeholder activity; a “good” rating for operations management; and “high confidence” for cost and schedule incentive, according to the scorecard.

Among UCOR’s significant accomplishments:

  • Achieved all performance-based incentives designed to complete Vision 2020, resulting in the world’s first demolition of a former uranium enrichment complex at the East Tennessee Technology Park (ETTP). The project finished ahead of schedule and under budget.
  • Seamlessly transitioned to limited operations and implemented the Phase 1 resumption-of-work plan during the COVID-19 pandemic, with effective safety protocols and no confirmed workplace COVID-19 cases.
  • Successfully transitioned approximately 250 workers from ETTP to perform cleanup work at the Oak Ridge National Laboratory and Y-12 National Security Complex upon achieving Vision 2020.
  • Implemented effective safety and health programs, and received the DOE “Legacy of Stars Award,” which is provided to sites that have earned the DOE Voluntary Protection Program Star of Excellence for three consecutive years.
  • Maintained regulatory compliance. UCOR had no regulatory permit infractions, non-compliances, reportable spills, or notices of violation. The contractor also met all enforceable regulatory milestones or supported renegotiation of them.
  • UCOR hosted numerous visits and formal regulatory inspections by Tennessee Department of Environment and Conservation and U.S. Environmental Protection Agency personnel with no violations identified.
  • Provided excellent support as part of the Regulatory Partnership initiative, enabling the Executive Leadership and Emerging Issues Teams to proceed more quickly to address longstanding issues, fostering improved relationships between OREM and regulators.

OREM also noted areas for improvement. UCOR experienced several issues with work planning and controls, including conducting a task without an approved work plan. Additionally, there were several transportation collision incidents. In response, the contractor promptly established a collision taskforce to evaluate options for improving the transportation program’s performance.

View the fee determination letter and UCOR's scorecard here.

-Contributor: Ben Williams​

-Source: EM Newsletter


3D Printing Improves Radiological Safety at SRS at Low Cost

September 09, 2020

 Savannah River Nuclear Solutions (SRNS) Senior Health Physicist Michael Ratliff, left, examines parts created by SRNS Principal Scientist Andy Warren using a 3D printer.

AIKEN, S.C. – An employee at the Savannah River Site (SRS) recently discovered how 3D printers can create unique objects at a low cost to improve safety and operations.

EM and Savannah River Nuclear Solutions (SRNS), the site’s management and operations contractor, analyze about 80,000 industrial air monitoring filters each year for radiological contamination within SRS nuclear facilities.

Known as a high-tech “radiological investigator,” Senior Health Physicist Michael Ratliff operates a laboratory at SRS where those analyses are completed.

Air filter analysis determines the source of radioactive particulates and helps measure possible airborne particulates within an operating facility. The process provides valuable data that can be used to monitor the health and safety of SRS employees working within nuclear facilities.

Ratliff said the circular filters sent to the laboratory for analysis are two inches in diameter on cards that are about three inches wide. Each card is packaged and delivered to the laboratory for analysis.

Recently, Ratliff sought the expertise of Andy Warren, who works at a laboratory within the SRNS environmental bioassay organization. That laboratory is used to analyze samples submitted by workers to assess possible occupational exposure to radiological substances and to ensure implemented hazard controls prevent occupational exposure.

Warren asked Ratliff how the cards are used in the high-volume equipment that processes the estimated 80,000 samples a year.

“I brought him one of the little fixtures used in the automated units,” Ratliff said. “To my surprise, the next day he provided a 3D printed part that fit perfectly on my counting instrument and holds the sample card exactly centered in a reproducible geometry.”

Ratliff noted that Warren’s solution improves the quality of data and reduces the time needed to prepare the analyses, all while enhancing radiological safety at SRS.

“When Michael contacted me and said, ‘I could use your help,’ we were already set up to create unique, one-off products using a computer-aided design program. It took about two hours to draft the part and send the design to the printer. The next morning, I came in, took it off the printer, and gave to Michael,” Warren said.

What use to take months at a design and fabrication shop can now be printed overnight at the site.

According to Warren, costs associated with 3D printing are low — approximately $7,000 for a printer and $2,000 for computer-aided design software.

“The fixtures made for Ratliff cost about $5 dollars each,” Warren said.

-Contributor: DT Townsend

Source: EM Update | Vol. 12, Issue 25 | Sept. 8, 2020​

Oak Ridge Constructing Test Facility for Sludge Processing

September 09, 2020

 Last week, crews moved a massive 50,000-tank into position to support efforts at the Sludge Processing Mock Test Facility under construction at Oak Ridge.​

OAK RIDGE, Tenn. – Construction is underway on the $10 million Sludge Processing Mock Test Facility, which will play a vital role in maturing technologies needed to begin processing Oak Ridge’s 500,000-gallon inventory of transuranic sludge waste.

Transuranic waste contains elements heavier than uranium, hence the name “trans,” or “beyond” uranium. Oak Ridge’s inventory of that waste was generated and stored onsite from years of defense-related research, conducted primarily at the Oak Ridge National Laboratory (ORNL).

The Oak Ridge Office of Environmental Management (OREM) has been working since 2003 to process, repackage, and ship Oak Ridge’s inventory of contact-handled and remote-handled transuranic debris waste for permanent disposal at the Waste Isolation Pilot Plant near Carlsbad, New Mexico. With that processing scheduled for completion in 2022, OREM is now working to address the site’s inventory of transuranic sludge waste.

Crews have already placed footers and poured the foundation for the mock test facility. They took another major step forward last week when they transported a 50,000-gallon tank to the worksite that will be used during testing.

 Site preparation for the Sludge Processing Mock Test Facility began in January 2020. Crews recently poured the concrete slab for the structure, which is slated for completion in October 2021.

OREM will test six critical technology elements to gather the data necessary to complete the final design and construction of the Sludge Processing Facility later this decade. Two of those technologies will be tested at the mock test facility, which is now under construction.

Engineers at the mock test facility will focus on testing pump technologies and instrumentation measurement technologies. Advanced pump technologies are needed to pull the sludge wastes out of their storage tanks for processing. The instrumentation measurement technologies will inform operators what material is moving through the pumps, including its contents and density, to assist with processing needs.

“There is a lot of preparation and groundwork required before we can begin addressing our inventory of transuranic sludge waste, but we are moving closer to that goal with the construction of this crucial testing facility,” ORNL Portfolio Federal Project Manager Nathan Felosi said.

Site preparation began for the Sludge Processing Mock Test Facility in January 2020, and construction is slated for completion in October 2021. OREM anticipates approximately two years of testing to gather the data needed to determine the best designs and approaches for the Sludge Processing Facility’s final design.

-Contributor: Ben Williams

Source: EM Update | Vol. 12, Issue 25 | Sept. 8, 2020​

West Valley Prepares for Major Facility Demolition

September 09, 2020


Using a mobile crane, workers install a long-reach arm on a new fork truck for use in waste operations for the future demolition of the Main Plant Process Building at EM's West Valley Demonstration Project.

WEST VALLEY, N.Y. – The West Valley Demonstration Project (WVDP) has obtained a fork truck capable of lifting more than 90,000 pounds for waste removal in the future demolition of the Main Plant Process Building (MPPB) — an EM 2020 priority.

“Safe and successful operations begin with safety, extensive planning, and the right equipment,” said Stephen Bousquet, EM WVDP deputy facility project director for the MPPB demolition. “This paves the way for the future demolition of the Main Plant Process Building.”

The fork truck was delivered to the site on three separate tractor-trailers. Workers used a mobile crane to assemble it.

“This fork truck is a versatile machine capable of lifting and stacking heavy box containers and loading railcars or tractor-trailers, and has a long reach for safe distancing” said Scott Chase, facility disposition operations manager for EM WVDP cleanup contractor CH2M HILL BWXT West Valley. “This fork truck will provide flexibility for safe, efficient, and successful waste operations during demolition activities.”

The five-story, 350,000-square-foot MPPB was constructed in the 1960s as a commercial reprocessing facility to recover reusable plutonium and uranium from spent nuclear reactor fuel. It operated from 1966 to 1972.

-Contributor: Joseph Pillittere

Source: EM Update | Vol. 12, Issue 25 | Sept. 8, 2020​

Last Major ETTP Facility Ready for Demolition at Oak Ridge

June 30, 2020

Crews have completed deactivation inside the 42,000-square-foot K-1600 facility. Teardown is scheduled to begin this summer. It will mark the final demolition project for the Oak Ridge Office of Environmental Management and its cleanup contractor UCOR to achieve Vision 2020.

OAK RIDGE, Tenn. – Workers have completed deactivating Building K-1600, a former test and demonstration facility for uranium enrichment centrifuges at the East Tennessee Technology Park (ETTP), and now it is ready for demolition.

“This is an incredibly significant project for us and our contractor UCOR because it paves the way for the final demolition at ETTP and positions us to accomplish our ambitious Vision 2020 goal,” said Jay Mullis, manager of the Oak Ridge Office of EM.
Among EM’s 2020 prioritiesVision 2020 is the cleanup program’s goal to complete all demolitions and major cleanup at ETTP by the end of 2020. It will mark the first time in the world an enrichment complex is cleaned and removed.
The 42,000-square-foot K-1600 facility was transferred to Oak Ridge cleanup contractor UCOR in September 2019 to complete deactivation and demolition. Centrus Energy Corp. had leased Building K-1600 since 2002 and finished decommissioning activities prior to the transfer. The company no longer needed the lease after consolidating its centrifuge testing and demonstration activities into a location in Oak Ridge.
Building K-1600 is a recognizable facility at ETTP due to its height and location. It sits in the center of the footprint for the former mile-long, U-shaped K-25 Building. K-25 was one of the site’s five massive gaseous diffusion buildings that once held the title of the world’s largest building.
Deactivation of K-1600 included rendering the building “cold and dark,” which means disconnecting utilities to the structure and installing temporary utilities, such as electrical power. It also included asbestos abatement and waste removal.
Demolition is scheduled to begin this summer.
To date, Oak Ridge’s EM program has taken down facilities spanning nearly 13 million square feet, transferred more than 1,200 acres of land for economic development, and placed more than 3,000 acres in a conservation easement for community recreational use.
Additionally, more than 100 acres will be used for historic preservation efforts at ETTP. Since the K-25 footprint is part of the Manhattan Project National Historical Park, the demolition of Building K-1600 will increase accessibility and remove risks in the area for future use.

-Contributor: Wayne McKinney

Oak Ridge Workers Successfully Bring Down ETTP’s Tallest Building

June 30, 2020

Crews use large winches to tear down a 180-foot tower of the Centrifuge Complex at Oak Ridge.

OAK RIDGE, Tenn. – Workers accomplished a major feat during one of the largest and final demolition projects at the East Tennessee Technology Park (ETTP) last week. They used powerful mechanical devices known as winches to pull over the 180-foot tower portion of the Centrifuge Complex. Click here to view a video of this project.

The task was part of a larger effort to take down the Centrifuge Complex — a series of structures originally built to develop, test, and demonstrate the capability of centrifuge technology for uranium enrichment. The last of these facilities ceased operation in the mid-1980s.

The Centrifuge Complex is one of the final major demolition projects remaining at ETTP as the Oak Ridge Office of Environmental Management (OREM) and its cleanup contractor UCOR strive toward one of EM’s 2020 priorities known as Vision 2020 — the goal to complete demolition and major cleanup at ETTP by the end of the year.

“With a constant focus on safety, our workforce has done an exemplary job throughout this project and especially with the challenge of the tower,” said Ken Rueter, UCOR president and CEO. “As one of the final major facilities to be demolished at ETTP, this project is taking us a big leap forward to achieving ETTP cleanup — a historic, first-ever complete cleanup of a uranium enrichment complex.”

A view of the last remaining portions of Oak Ridge’s once sprawling Centrifuge Complex are shown here before crews pulled down the 180-foot tower, at left. Workers will now focus on removing the debris and finalizing demolition on the K-1210 complex, at right. The entire project is scheduled for completion later this summer.

Workers used powerful winches to pull down the steel beams of the 180-foot tower of Building K-1220 at Oak Ridge.

​The tallest structure at ETTP, the Centrifuge Complex spanned 235,000 square feet and reached 180 feet in height in some locations. The challenge involved identifying the best way to take the tower down safely when conventional demolition equipment is intended for structures only measuring approximately 100 feet in height.

Engineers from OREM and UCOR evaluated a variety of methods to demolish the tower based on safety, complexity, risk, and equipment availability. The alternatives included winches, bulldozers, explosives, and a high-reach processor to cripple the tower.

They determined winches met all of the qualifications and were the best choice. While the approach was a success, it involved a great deal of preparation, including specialized training to operate the giant winches capable of pulling down massive steel beams.

The Centrifuge Complex was comprised of four sections. Crews are in the final phases of taking down the last two sections of the complex. Those include the K-1210 Complex, which served as a pilot plant for testing feed, withdrawal, and depleted uranium hexafluoride transfer systems, and the K-1220 Complex, which was used primarily to test production centrifuges, and contained the 180-foot tower.

With the tower down, workers will now focus on removing the debris and finalizing demolition on the K-1210 complex. The entire project is scheduled for completion later this summer.

Workers already brought down the K-1004-J laboratory section, an original Manhattan Project facility built for research and development. They also finished tearing down the fourth section, the K-1200 facility, known as the Advanced Machine Development Laboratory and Component Preparation Laboratory.

-Contributor: Wayne McKinney

Source: EM Update | Vol. 12, Issue 14 | June 23, 2020​​

West Valley Prepares for Future D&D Under New Safety Protocols

June 30, 2020

Workers install a new hoist in the Main Plant Process Building to be used for moving waste boxes and drums and other work when the West Valley Demonstration Project returns to full operations.​

WEST VALLEY, N.Y. – An EM facility disposition crew recently replaced a hoist in the Main Plant Process Building, marking the West Valley Demonstration Project’s (WVDP) first work activity in which workers donned personal protective equipment while following safety protocols due to COVID-19.

Replacing the hoist in the Equipment Decontamination Room, as WVDP operated in an essential mission-critical posture, also signified progress toward a broader project — the future demolition of the Main Plant Process Building — included in EM’s priorities for 2020.

The new equipment will be used to shift an aerial lift into a chemical process cell and move boxes and drums filled with waste when the site returns to full operations and crews resume deactivation work inside a former reprocessing cell in the building.

Before replacing the hoist, employees discussed questions and concerns with supervisors and senior staff in a collaborative, inclusive manner. The discussions focused on how to maintain social distancing while helping one another don and doff personal protective equipment, including respirators.

The team agreed to a safe approach in which employees maintain six feet of distance when possible and wear face masks. Only one worker at a time is allowed to exit an area to avoid clustering, and they must cover the respirator exhalation ports with towels to reduce exhaled vapor droplets from escaping while the workers help each other put on equipment, among other things.

EM WVDP Safety and Site Programs Team Leader Jennifer Dundas commended the team members for their pre-job briefing and work.

“Encouraging employees to speak freely when confronting an issue or challenge is the best way to solve a problem,” Dundas said. “It fosters the sharing of ideas and allows everyone an opportunity to be part of the solution. In the end, their agreed-upon solution helped them to safely complete this work activity.”

Lessons learned from the project will be applied to future cleanup work at the site. The lessons include the importance of refocusing on safety, being aware of changing conditions and new protocols, and getting reacquainted with procedures, work packages, and radiation work permits.

-Contributor: Joseph Pillittere

Source: EM Update | Vol. 12, Issue 14 | June 23, 2020​

Canadian technology offers Fukushima tritium option

November 06, 2019

The Canadian company's Advanced Water Distillation (AWD) technology was initially developed for pressurised heavy water reactors. A test plant in Oakville, Ontario that has been in operation for a year has shown the detritiation of light water using AWD to be five times as efficient as that of heavy water, the company said. A multi-column demonstration plant is to be built in 2020.

Tritium is a heavy radioactive isotope of hydrogen that can replace ordinary hydrogen in light water or deuterium in heavy water, and occurs both naturally and in small amounts during the operation of nuclear power plants. Tritiated water molecules cannot be separated from light or heavy water by conventional filtration since all water molecules behave very similarly.

Water containing very low levels of tritium and other radioactive substances is normally released from nuclear power plants under tightly controlled and monitored conditions. Pressurised heavy water reactors - Candus - produce significantly more tritium than most other types of reactors owing to the use of heavy water (deuterium) in the moderator and heat transport system. Facilities to remove tritium from heavy water from Candu reactors currently operate at Darlington in Canada and Wolsong in South Korea.

Laker says its AWD technology exploits the latest advances in water distillation equipment design and configuration, and in testing has already achieved a five-fold equipment height reduction and 80% energy consumption reduction over conventional water distillation. The process operates under benign conditions of purified warm water under vacuum, which eliminates the possibility of chronic leakage and associated environmental emissions, it says.

Continue reading at https://www.world-nuclear-news.org/Articles/Canadian-technology-offers-Fukushima-tritium-optio​

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