from Sputnik News:

Radioactive microparticles were detected in the homes of six workers in central Washington state’s Tri-City area who are associated with the Hanford nuclear site, a major Cold War-era plutonium manufacturing facility, scientists have reported.

A study published this month in the Journal of Environmental Engineering Science reported that small but still dangerous amounts of radioactive elements were found in dust collected by cloth wipes and vacuum cleaners in order to track the potential spread of radiation from one of the United States’ most notorious nuclear cleanup sites.

The same study also found radioactive particles in the homes of nuclear workers associated with the Los Alamos National Laboratory in New Mexico and the Rocky Flats Plant in Colorado. All three sites are heavily associated with nuclear weapons production.

It’s believed the particles could have found their way into the homes in a variety of ways, including being attached to workers’ clothing and being stirred up by wind storms and wildfires, which are common in the region, and blown inside.

The tests found radioactive uranium, thorium, plutonium and americium particles that, while innocuous in the external environment, represent a “potential source of internal radiation exposure” if ingested, warns Marco Kaltofen, a civil engineer affiliated with the Worcester Polytechnic Institute in Massachusetts and author of the study, the Seattle Times reported.

Exposure to these materials increases the risk of cancer, the study noted. Plutonium is “fiendishly toxic, even in small amounts,” said Glenn Seaborg, the physicist who discovered the element in 1941, as quoted in a 2011 fact sheet on the Rocky Flats site. The Agency for Toxic Substances and Disease Registry notes in its public health statement on thorium exposure that the radioactive isotopes can sit in the soil for decades and cause lung cancer if inhaled. Uranium ingestion mainly targets the kidneys, the ATSDR notes, while americium destroys and irradiates bone tissue and can cause bone cancers such as leukemia or lymphoma and damage the thyroid.

“These radioactive particles are tiny and difficult to detect once you get a few inches away, but once inside the body, the distance from our tissue is essentially zero,” Kaltofen explained. While the skin can handle certain amounts of radiation safely, the body’s internal organs have no protection and a tiny amount can prove fatally toxic. Polonium-210, for example, is 250 million times more toxic than hydrogen cyanide, the New York Times reported.

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