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Other related Hanford projects and studies : Hanford environmental dose reconstruction (HEDR) protect
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MAY 1999
[PDF-464.14 KB]
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Description:The Hanford Environmental Dose Reconstruction (HEDR) Project was a scientific study to estimate the amount and types of radioactive materials that were released to the environment from the Hanford site and to estimate radiation doses to representative individuals. (See map). This study was conducted from 1987 to 1995, long after the releases occurred. The HEDR Project developed complex mathematical models that take into account what radionuclides Hanford released, how much radiation was released, how the releases moved through the air, water and soil, the ways in which people were exposed, and many variables for individual differences. The HEDR study concluded that iodine-131 (I-131) accounted for more than 98 percent of the radiation dose that most people received from Hanford’s releases. According to the HEDR study, almost all the I-131 releases to the air occurred from December 26, 1944 (the first day of plutonium production) through December 31, 1957. Several Hanford Health Effects Projects use the HEDR computer models to estimate dose estimates. Additional scientific work for the HEDR Project is in progress. This work focuses on: (1) exposures to radioactive particles and short- lived radionuclides on the Hanford site, and (2) the doses people may have received from Hanford’s radioactive releases to the Columbia River.
otherhanproj.pdf
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