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HTDS Guide > Overview
> What Happened at Hanford
HTDS Guide
What Happened at Hanford
The Hanford Nuclear Site was built in the 1940s in southeastern
Washington State to produce plutonium for nuclear weapons.
In the mid 1980s, as a result of public requests, the U.S. Department
of Energy released previously unavailable or classified documents about
past operations at Hanford. The information showed that large amounts of
iodine-131 and other radioactive materials were released into the air
from Hanford from 1944 through 1957.
Concerns about the possible health effects of Hanford's radiation led
to a decision by Congress to mandate the HTDS in 1988.
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