Worker Contamination Halts Radioactive Site Demolition

 

 

 

 

 

The federal government, along with state regulators have halted the demolition of the Hanford Nuclear Reservation until a safe plan can be developed after the discovery that dozens of demolition workers have inhaled or ingested radioactive particles in the past year. The Hanford site is a plutonium processing plant from the 1940s located Richland, Washington that took liquid plutonium and shaped it into hockey puck-sized disks for use in nuclear warheads. The plant helped create the nation’s nuclear arsenal and made key portions of the atomic bomb dropped on Nagasaki, Japan that ended WWII.

Plutonium production ended in the 1980s and by 1989, the site switched its focus to cleanup of nuclear wastes. The contamination is a discouraging delay in a massive $2 billion a year cleanup effort that started in 2016. Hanford is the nation’s most polluted nuclear weapons production site. The Energy Department, which owns Hanford, has launched an independent investigation into the spread of radiation at the plant.

Hanford officials issued a report in late March that said a total of 42 Hanford workers inhaled or ingested radioactive particles from demolition of the Plutonium Finishing Plant when they were exposed during contamination events in June and December of last year. Radioactive contamination was also found outside plant offices and inside two dozen vehicles, the report said. Seven workers’ homes were checked for radioactive contamination, with none found, the report said. The report concluded Hanford officials placed too much reliance on air-monitoring systems that failed to pick up the spread of radioactive particles.

According to the report, managers of the private contractor performing the demolition work for the federal government were caught between maintaining safety and trying to make progress toward project deadlines. The risk escalated as walls of the plutonium plant were knocked down and the rubble was stored in piles. The report stated that fixatives sprayed on the rubble to keep radioactive particles from blowing away may not have been effective. This theory seems to be backed up by the the state Health Department’s findings of very small amounts of airborne radioactive contamination near Highway 240 in the past year that is believed to have come from the plant demolition 10 miles away.

The amount of radiation involved was reportedly low, lower than naturally occurring levels of radiation people are exposed to in everyday life. The amounts of radiation that have escaped are considered too small by state experts to pose a health risk. All the contamination was found on lands that are closed to the public. The project was not supposed to exposed workers to any contamination but in June radioactive particles escaped and traces were found inside 31 workers. In December, eleven more workers were found to be contaminated which prompted the government to shut down demolition.

The state Health Department said there is presently no threat to public health from the releases. “However, we are concerned if work resumes without better controls, a risk to the public may develop,” the agency said in a recent letter to Hanford managers.