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Comment Period

PUREX Plant permit modification

Hanford Dangerous Waste Permit

June 7, 2021 - July 23, 2021, 11:59 p.m.

We're holding a 45-day public comment period addressing proposed modifications to the Hanford Dangerous Waste Permit for tanks TK-P4 and TK-40 located in the Plutonium-Uranium Extraction (PUREX) Plant Complex in the 200 East Area of the Hanford Site.

The permittees are the U.S. Department of Energy, Richland Operations Office and the Central Plateau Cleanup Company, LLC. The Hanford Site is in Southeastern Washington.

Review and comment 

The modification proposal and supporting documents are on our Hanford public comment periods page.

Proposed changes

The permit modification proposes clean-closure of tanks TK-P4 and TK-40, including the concrete pads below them. The modification also proposes adding tanks TK-P4 and TK-40 to Part V of the permit. This includes adding an Addendum H, Closure Plan. These changes will allow for clean-closure activities.

PUREX background

The Plutonium Uranium Extraction Plant (PUREX) was one of five of Hanford's plutonium processing "canyons." These facilities were responsible for removing plutonium from fuel rods during plutonium production years, and remain highly contaminated today. Of the five, one of the most recognizable is PUREX. This canyon was built in the 1950s, began operations in 1956, and eventually shut down for good in 1988. Two tunnels extend out from the complex and house highly contaminated rail cars, along with other highly-contaminated equipment.

For more information see the Nuclear Waste Program public comment page.

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Comment online

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Comment by mail

Daina McFadden
3100 Port of Benton Blvd
Richland, WA 99336
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Daina McFadden
Permit Communication Specialist

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