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.
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.”
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
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
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
Posiva – the Finnish waste management company, has laid the foundation stone for the used fuel encapsulation plant Onkalo, at Olkiluoto, with construction scheduled for completion in 2022.
Construction of the world’s first permanent underground nuclear storage facility (costing an estimated EUR500 million (US$550 million) began in 2016 and once complete, it will store up to 6,500 tons of waste. Operation of the repository is expected to begin in 2023.
Used fuel will be packed inside copper-steel canisters at the above-ground encapsulation plant, then transferred into the underground repository, located at a depth of 400-450 meters.
“Teollisuuden Voima Oyj (a joint owner of Posiva) has been working and doing research on the final disposal of nuclear fuel since the late 1970s,” Posiva Communications Manager Pasi Tuohimaa told Nuclear Energy Insider.
“The used fuel needs to be cooled down in temporary storage for at least 40 years, so the first moment to start final disposal is now.
“Posiva was established in 1995, when the Finnish law changed so no used nuclear fuel is allowed to be brought in to Finland or taken out. The other owner of Posiva, Fortum, had transported its used nuclear fuel to Russia prior to that.”
Continue reading at https://analysis.nuclearenergyinsider.com/significant-milestone-world-first-underground-repository?utm_campaign=NEI%2009OCT19%20Newsletter%20%28Database%29&utm_medium=email&utm_source=Eloqua&elqTrackId=891b9803e56b4ff19e50e434e7e12579&elq=1bd16e8d3aa14d51a3e08be0320218b6&elqaid=48492&elqat=1&elqCampaignId=29382
RICHLAND, Wash. – One of the Hanford Site’s most critical risk-reduction efforts continues at the Plutonium Finishing Plant’s (PFP) main processing facility.
Since April, workers with EM Richland Operations Office (RL) contractor CH2M HILL Plateau Remediation Company (CHPRC) have safely removed large sections of the main facility, including two stairwells, several sections of piping, and an associated concrete vault.
This time-lapse video highlights lower-risk demolition completed through mid-July.
Demolition resumed after crews finished removing debris that had been on the ground since December 2017, when work stopped after a spread of low levels of contamination. Since September 2018, crews with CHPRC have safely packaged and transferred nearly 7,000 tons of debris to Hanford’s onsite regulated landfill.
Demolition of the remaining lower-risk portions of the main processing facility is expected to be completed by the end of August and is being done under a revised demolition strategy and safety controls implemented last fall.
“PFP demolition continues to be a high priority, and I am encouraged by the safe and steady progress,” said Tom Teynor, RL project director. “The enhanced safety measures in place since lower-risk activities resumed nearly a year ago have proved effective in protecting workers, the environment, and the public.”
This animation shows the revised demolition approach and enhanced controls, reflecting worker input. Pauses are built into the schedule to review lessons learned and incorporate additional input before proceeding.
“The physical progress on this project is really exciting to see,” said Jason Casper, CHPRC vice president for the PFP closure project. “I’m proud of our team’s continued focus on safety over speed.”
RL continues to post weekly updates on PFP activities here.
-Contributor: Dieter Bohrmann
-Credit: EM Update Newsletter
AIKEN, S.C. – EM, the National Nuclear Security Administration (NNSA), and the management and operations contractor at the Savannah River Site are partnering to reduce radiological exposure, improve efficiency, and align with long-term DOE plutonium downblending goals at the site’s K Area Complex.
“K Area is ramping up its capabilities in order to meet the needs of DOE,” Savannah River Nuclear Solutions Facility Manager Steve Wilkerson said. “We are moving from one-shift to two-shift operations, with the plan of being at four shifts by 2021.”
Plutonium downblending is the process of mixing plutonium oxide with an inert material. The material will then be shipped to an out-of-state repository for disposition as waste. All plutonium downblending takes place inside a K Area stainless-steel glovebox with safety glass panels and fitted glove-port openings. The glovebox shields workers from hazards while allowing for contaminated materials handling.
Employee improvements to the glovebox include:
Employees completed training in the updated procedures in a newly built mock-up of the glovebox, which is housed in a non-contaminated environment. The mock-up is made of aluminum, making it sturdier than the previous wooden one.
“We are on track to have process optimization complete by spring of 2020,” DOE Nuclear Materials Manager Maxcine Maxted said. “These improvements required a lot of planning and work to complete, but will result in a safer, more efficient process.”
NNSA is in the design phase of its surplus plutonium disposition project, which will add three additional gloveboxes to the K Area, increasing plutonium downblending capacity and expediting the removal of plutonium from South Carolina.
-Contributor: Lindsey MonBarren
OAK RIDGE, Tenn. – EM’s cleanup contractor at the Oak Ridge Site is helping develop the next generation of workers by leading or collaborating on numerous programs to ensure future cleanup is met with a capable, safety-conscious workforce.
UCOR President and CEO discussed those efforts under way at the 1,800-employee company during an address at the 2019 East Tennessee Workforce Summit last week.
“Even though UCOR will complete major cleanup at ETTP (East Tennessee Technology Park) next year, we realize that much more cleanup will be required here in Oak Ridge and across the nation,” Rueter said. “Because of that continuing need for workers, we are committed to cultivating the next generation of cleanup workers.”
EM has created new economic development opportunities by cleaning and transferring land at ETTP. However, much more work remains to remove all of the old, hazardous infrastructure at the Oak Ridge National Laboratory and Y-12 National Security Complex, which will enhance safety and clear the way for mission growth at these crucial research and national defense sites.
UCOR’s comprehensive workforce development approach begins in elementary schools and continues through higher education, technical training, and apprenticeships.
The company has invested more than $150,000 in local elementary, middle, and high schools to fund science, technology, engineering, and math (STEM) education projects in classrooms.
UCOR partnered with United Steelworkers to offer hazardous waste operations and emergency response training to high school students in the region, providing the students credentials that will help them find work in the hazardous waste cleanup industry.
At the collegiate level, UCOR collaborated with the University of Tennessee’s nuclear engineering department to offer the first nuclear decommissioning and environmental management minor degree at a university or college in the U.S. UCOR has hired several recent graduates with that minor degree. UCOR also is collaborating with Roane State Community College on a chemical operators program.
A collaborative effort with the North America's Building Trades Unions and the Cooperative Agreement of Labor and Management led to the East Tennessee Apprenticeship Readiness Program. UCOR sponsored the program’s inaugural classes, and the 48 graduates were offered employment in the Oak Ridge area, many by UCOR.
The company’s summer internship program pairs college students from across the nation with mentors. Several participants pursued careers at UCOR after completing their internships.
Within UCOR, the Rising Senior Leaders Program gives a boost to future leaders. It is UCOR’s signature 12-month development program for leaders who show great potential to rise to upper level leadership positions.
“We have had great success in our cleanup work in Oak Ridge, bringing in projects ahead of schedule and under budget, and most importantly, completing them safely,” Rueter said. “We are proud to have so many partnerships with other organizations, as well as providing our own sponsorship, to keep alive the legacy of safe, effective cleanup and environmental risk reduction at the Oak Ridge Reservation.”
OAK RIDGE, Tenn. – Nearly 20 employees from DOE’s offices of EM and Science supported a local middle school’s first science, technology, engineering, and mathematics (STEM) night, which attracted more than 800 students and their family members.
Jefferson Middle School’s recent event provided the students and families the opportunity to learn and have fun. Organizers designed activities to share ideas, resources, and opportunities in the STEM fields. Those fields are central to the technical work occurring in DOE’s Oak Ridge operations, which employ about 12,000 people and have a $5.6 billion economic impact in Tennessee.
Many local organizations partnered with the school for the STEM night to enable the students to explore different aspects of STEM, including 3-D printing, laser scanning, radiation detection, virtual reality, drones, and CO2-powered race cars.
DOE Oak Ridge Office of Environmental Management (OREM) employees gave students an entertaining hands-on lesson on building lava lamps using vegetable oil, water, food coloring, and effervescent antacid. Others participated in the DOE Career Café, where students shared interests, learned about careers, and asked questions of OREM’s scientists, engineers, and technicians.
“Community involvement is incredibly important to us as an organization, and we are continuously looking for opportunities for our employees to interact with students in local schools,” OREM Manager Jay Mullis said. “This event provided an excellent environment for students to have some fun and learn how diverse and exciting STEM careers can be.”
“We are proud to represent Oak Ridge and bring the entire community together to further the STEM possibilities for our students, and the Department of Energy plays a vital role in this endeavor,” Goldberg said.
Oak Ridge was the second school district in the U.S. to have each of its elementary, middle, and high schools fully STEM-accredited and certified.
Mullis appreciated the opportunity to engage the students at this stage of their education at the STEM event.
“We work to introduce them to new, exciting ideas and make them aware of the options available to them,” he said. “It is an investment in our future. One day, some of these kids may be responsible for leading our program and achieving Oak Ridge’s cleanup mission.”
-Contributor: Ben Williams
AIKEN, S.C. – EM’s cleanup contractor at the Savannah River Site (SRS) is benefiting from a new recruitment strategy to fill much-needed positions in industrial health and safety.
“Savannah River Nuclear Solutions (SRNS) must have qualified health and safety professionals to achieve our missions. To stay ahead of our critical need, we spearheaded partnerships with accredited post-secondary schools to bring us face to face with upcoming graduates looking to start meaningful careers,” SRNS Health and Safety Manager Cindy Lunsford said.
Over two days late last year, SRNS health and safety professionals discussed career opportunities and presented an overview of SRS and the surrounding area to occupational safety and health students at Murray State University (MSU) in Murray, Kentucky. They also met one on one with the students.
SRNS offered employment to a qualified candidate while at MSU, and since returning to SRS, the team has received applications from other MSU students.
The recruitment team is exploring use of this strategy at other universities in Alabama, North Carolina, and Florida.
-Contributor: Caroline Reppert
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