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HTDS Guide > Hanford
History > Classified Information Released
HTDS Guide
Classified Information Released
For a long time, details about Hanford's operations were not public.
In 1986, as a result of public concerns and requests made through the
Freedom of Information Act, the U.S. Department of Energy (DOE) began
releasing tens of thousands of pages of previously classified or
unavailable documents.
The documents revealed to the public, for the first time, that
substantial quantities of radionuclides were released into the
environment from Hanford.
CDC convened a panel of independent scientists (Hanford Health
Effects Review Panel) to evaluate the DOE documents. Two of the panel's
most important recommendations were to conduct a study to estimate the
radioactive materials released from Hanford and to determine the
feasibility of studying the health effects to the thyroid of that
exposure.
The panel's recommendations evolved into what are known today as the
Hanford Environmental Dose Reconstruction Project (HEDR) and the Hanford
Thyroid Disease Study (HTDS).
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