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The "Green Run" was a secret U.S. Government release of radioactive fission products on December 2–3, 1949, at the Hanford Site plutonium production facility, located in Eastern Washington. Radioisotopes released at that time were supposed to be detected by U.S. Air Force reconnaissance. Freedom of Information Act (FOIA) requests to the U.S. Government have revealed some of the details of the experiment.〔(The Release of Radioactive Materials from Hanford: 1944-1972 )〕 Sources cite of iodine-131 released,〔〔 (See (Google Books ))〕〔 pp. 130-131.〕 and an even greater amount of xenon-133. The radiation was distributed over populated areas, and caused the cessation of intentional radioactive releases at Hanford until 1962 when more experiments commenced.〔 There are some indications contained in the documents released by the FOIA requests that many other tests were conducted in the 1940s prior to the Green Run, although the Green Run was a particularly large test. Evidence suggests that filters to remove the iodine were disabled during the Green Run.〔 The project gets its name from the processing of uranium at Hanford. Due to the higher radioactivity involved, batch processing waited 83 to 101 days to allow the radioactive isotopes to decay. For the Green Run test, a batch was run with only a 16 day cooling period. The unfiltered exhaust from the production facility was therefore much more radioactive than during a normal batch. ==Oral history== Leland Fox says that his father was in the military and was bivouacked on the banks of the Wenatchee River during the Green Run: Health Physicist Carl C. Gamertsfelder, Ph.D. described his recollections as to the reasons for the Green Run by attributing it to the intentions of the Air Force to be able to track Soviet releases. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Green Run」の詳細全文を読む スポンサード リンク
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