Officials say the nuclear waste is leaking between the walls of a double-walled storage tank. None of the waste is believed to have escaped into the nearby soil.
The Obama administration released its proposed Hanford cleanup budget for the 2015 fiscal year Tuesday - and it's a sizable cut. KEPR looked into how the decrease will affect the cleanup and the Tri-Cities' economy.
New documents show some newer nuclear waste storage tanks at the Hanford site could leak.
The U.S. Department of Energy says members of the public can register online beginning in March for public tours of Hanford cleanup sites and the B Reactor.
Donna Busche, who filed a complaint in 2011 about safety issues at Hanford, was fired Tuesday from her job at the nuclear site.
The Hanford Waste Treatment Plant Project will hold a career fair in Richland Feb. 21 to fill more than 200 new positions in engineering, construction, and other fields.
The U.S. Department of Energy will make changes to its waste management practices at Hanford to align them with Washington state regulations.
Three Hanford Nuclear Reservation contractors announced a restructuring plan that could result in up to 450 layoffs.
A nuclear safety manager at the Hanford Nuclear Reservation has filed a new complaint alleging she has suffered retaliation since filing her original complaint in 2011.
The U.S. Department of Energy says just one of the older single-walled storage tanks at the Hanford Nuclear Reservation appears to be actively leaking.
Hanford workers have completed the removal of radioactive waste from another of the site's single-walled storage tanks.
Workers at the nation's most contaminated nuclear site could start receiving furlough notices Wednesday because of the partial government shutdown.
The U.S. Department of Energy is proposing more delays in the cleanup of the Hanford Nuclear Reservation, the nation's most polluted nuclear site, the agency said Wednesday.
Design changes at a new radioactive waste disposal plant at the country's most contaminated nuclear site in south-central Washington were not properly verified to ensure safety, the U.S. Department of Energy's Inspector General concluded in a report issued Thursday.
Six Hanford employees contracted under Washington River Protection Solutions were taken to the hospital Wednesday morning.
Government regulators and watchdog groups want more information about a new Department of Energy proposal to speed cleanup of the Hanford Nuclear Reservation, the nation's most polluted nuclear site.
The Department of Energy released its framework on Hanford cleanup.
A Department of Energy contractor says five drums holding low-level radioactive waste fell off a flatbed truck in the center of Hanford Monday but no contaminated material was released.
Hanford officials say unusual radiation readings that led them to declare an emergency operations alert last month came from old contamination.
Two Hanford workers were sent to a hospital Thursday morning as a precaution after developing respiratory symptoms that might be linked to chemical vapors from underground waste tanks.
An alert at Hanford sent four workers to the hospital. Radiation was detected while moving waste. This led to a rare emergency operations alert.
An emergency operations alert was activated at Hanford overnight after radiation was detected during a transfer from a waste tank.
Washington Attorney General Bob Ferguson says an appeals court decision on a nuclear repository in Nevada is good news for people who want a permanent place for Hanford waste.
More than 1,000 union workers at the nation's most contaminated nuclear site have rejected contract offers from five cleanup companies there.
An emergency siren will be tested on the U.S. Department of Energy's Hanford Site on Thursday, July 18, 2013.
The state of New Mexico has declined the Department of Energy's request for quick approval of a proposal to bring radioactive waste from Washington state's Hanford Nuclear Reservation to the Waste Isolation Pilot Plant near Carlsbad.
The U.S. Department of Energy (DOE) has agreed to improve waste handling practices and pay $136,000 in a settlement announced Tuesday by the U.S. Environmental Protection Agency.
For months now the KING 5 Investigators have exposed a Hanford contractor that may be putting your safety at risk. Action News is teaming up with KING 5 Seattle to dig deeper into Hanford's dirty secrets.