Hanford Site Cesium Removal System Resumed Operations
The Tank-Side Cesium Removal system restarted this month to continue processing liquid radioactive waste.
Updated on Sept. 21, 2026 in Nuclear
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The Tank-Side Cesium Removal system at the Hanford Site has returned to service following an operational pause that began in February 2026. The system is now actively filtering radioactive cesium and solid materials from liquid waste.
Why it matters
Resuming operations allows the facility to continue managing liquid waste streams by separating hazardous components into low-level waste. The restart follows a mandatory hold in March 2026 caused by a lack of available storage capacity in Tank AP-106.
The system mandates a two-week buffer between the completion of one batch and the initiation of a new treatment cycle. Processed materials are stored in Tank AP-106, which serves as the final receptacle for the low-level waste.
The players
Hanford Site
A decommissioned nuclear production complex in Washington state currently managing the cleanup of radioactive and chemical waste.
The details
The Tank-Side Cesium Removal (TSCR) system functions by passing liquid waste through ion-exchange columns, specialized filters that selectively bind radioactive cesium isotopes. Once the hazardous cesium and solid particulates are stripped away, the remaining liquid is classified as low-level waste. This material is then transferred to Tank AP-106 for safe containment.
Timeline
February 25, 2026: The TSCR system paused operations.
March 2026: Operators decided against restarting the system due to limited storage.
September 2026: The system resumed active operations.
The Tech Race
The Hanford Site waste management program continues to refine the throughput capacity of its onsite filtration technologies. This return to service marks a critical milestone in clearing the backlog of liquid waste that has accumulated since the February pause.
The resumption of operations ensures that liquid waste processing at the Hanford Site continues to meet safety and storage containment requirements. Local residents and stakeholders can track the ongoing site cleanup progress through official site updates.
The takeaway
The system restart signifies the stabilization of the waste processing pipeline following capacity constraints earlier this year. Observers should monitor the site for updates regarding the successful completion of the current treatment cycle.
Further reading
For broader context on waste management initiatives, explore the Nuclear section.
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