DOE Breaks Ground on Hanford Waste Pretreatment Plant
The Advanced Modular Pretreatment System will prepare radioactive liquid waste at the Washington site before it is glassified.
Updated on Nov. 2, 2026 in Nuclear
The U.S. Department of Energy announced groundbreaking on November 2, 2026, for the Advanced Modular Pretreatment System at the Hanford Nuclear Reservation. The facility will sit next to the AP tank farm in the 200 East Area and is designed to remove 99.9 percent of radioactive materials from liquid waste before vitrification.
Why it matters
The Hanford site in Washington holds some of the nation's most hazardous legacy nuclear waste, and the pretreatment step is a bottleneck for cleanup. DOE projects the new system will triple the speed of waste treatment and cut 12 years from the East Tank Farm cleanup project.
The AMPS removes 99.9 percent of radioactive material from waste and will pretreat a combined 3.6 million gallons per year, compared with the Waste Treatment and Immobilization Plant's maximum of about 2 million gallons per year. The completion timeline and the realized cleanup savings have not yet been established.
The players
U.S. Department of Energy
The federal department responsible for managing the nation's nuclear weapons complex and its legacy waste cleanup, including the Hanford site in Washington.
Hanford Nuclear Reservation
A former plutonium production site in southeastern Washington that is now the focus of one of the largest environmental cleanup efforts in the United States.
The details
The AMPS will pretreat liquid waste before it is sent to the Vitrification (VIT) plant, where the waste is turned into inert glass for safe storage. The VIT plant has been vitrifying and stabilizing liquid waste from hundreds of tanks at Hanford for just over the last year.
Timeline
November 2, 2026: DOE announces groundbreaking for the AMPS at Hanford.
Just over the last year: the VIT plant has been vitrifying liquid waste from hundreds of Hanford tanks.
Legacy Cleanup
The AMPS builds on the Hanford Waste Treatment and Immobilization Plant, which has been working to vitrify decades of stored radioactive liquid waste. Adding a dedicated pretreatment stage addresses the throughput limit that has slowed the broader cleanup of the site's tank farms.
If the AMPS meets its projections, the Hanford cleanup could move more waste through treatment each year and shorten the timeline for removing hazardous material from the East Tank Farm. Residents of Washington's Tri-Cities region and downwinders near the site would see progress only as the facility comes online, and no completion date has been stated.
The takeaway
Pretreatment is often the constraint in nuclear waste cleanup, so capacity gains at this stage can shift multi-decade timelines. Readers should watch for official schedule updates from DOE on when the AMPS will begin operating.
Further reading
For more background on the cleanup effort, see Nuclear coverage on Wisevoter.
Source note: This article includes information reported by NEWStalk 870.
