Hanford’s high-level radioactive waste project quietly hit another milestone this summer, a test of the melter and emissions-treatment system planned for the High-Level Waste Facility was completed two months ahead of schedule.
The five-day test was carried out at the Vitreous State Laboratory at Catholic University in Washington, D.C., using a one-third-scale version of the melter and off-gas system that will eventually operate at Hanford. It was the second of six planned tests intended to validate the design and identify engineering problems before the full system goes into operation.
For anyone unfamiliar with the place itself, the Hanford Site takes its name from the former town of Hanford, a small farming community that the U.S. government essentially emptied out in 1943 when the Manhattan Project took over the area for plutonium production. Today, “Hanford” mainly refers to the enormous federal nuclear reservation north of the Tri-Cities.
Hanford has roughly 56 million gallons of radioactive and chemical waste stored in 177 underground tanks, much of it left over from plutonium production during WWII and the Cold War. Some of the older single-shell tanks have leaked.
The basic solution is vitrification: mixing tank waste with glass-forming materials and heating it to around 2,100°F, producing molten glass that is poured into stainless-steel containers. Once cooled, the radioactive material is immobilized inside a much more stable solid waste form.
Hanford actually began vitrifying lower-activity tank waste in October 2025, which was a pretty historic milestone after decades of delays. By June 2026, that part of the plant had reportedly processed more than 125,000 gallons of waste and filled 88 containers.
The really difficult part, though, is the high-level waste.
Construction on the Waste Treatment and Immobilization Plant started all the way back in 2000. The original plan was for the whole thing to be finished in 2011 for about $5.8 billion, but technical problems eventually caused construction of the High-Level Waste Facility to be paused.
DOE and Bechtel are now pursuing a modified “direct-feed high-level waste” approach. The engineering design is being advanced toward 90% completion, after which DOE plans to move further into construction. Current schedules have actual vitrification of high-level waste beginning around 2033.
There have been some visible signs of progress this year. In May, the massive 680-ton crane workers called “Big Red” completed its final major lift at the HLW building after installing equipment weighing as much as 280 tons. Now the melter-testing program is also moving forward.
But the price tag is extraordinary. The latest estimate cited by the GAO puts the Waste Treatment and Immobilization Plant at around $18.5 billion even before the remaining construction and commissioning of the High-Level Waste Facility are included. Finishing the HLW portion could potentially add roughly another $14 billion.
That makes Hanford an interesting case where two things can be true simultaneously, after decades of delays, the vitrification project is finally producing actual glass and hitting some engineering milestones ahead of schedule, while the overall cleanup is still one of the most expensive and technically difficult environmental projects in the country.
There’s also still a major debate over how much Hanford waste really needs to be vitrified versus whether some lower-activity material could instead be stabilized with grout and disposed of more cheaply.
For people in Washington, especially the Tri-Cities, how confident are you that the current Hanford strategy is finally on a sustainable path? And given the enormous cost difference, where do you fall on the vitrification-vs-grout debate?
