The Truth About Chernobyl The Truth About Chernobyl The Truth About Chernobyl is a 1991 book by Grigori Medvedev. Medvedev served as deputy chief engineer at the No. 1 reactor unit of the Chernobyl Nuclear Power Plant in the 1970s. At the time of the Chernobyl disaster in 1986, Medvedev was deputy director of the main industrial department in the Soviet Ministry of Energy dealing with the construction of nuclear power stations. Since Medvedev knew the Chernobyl plant well, he was sent back as a special investigator immediately after the 1986 catastrophe. In his book, Medvedev provides extensive first-hand testimony, based on many interviews,
Effects of the Chernobyl disaster in 1988 to be "600,000 man Sv, equivalent on average to 21 additional days of world exposure to natural background radiation." The inhalation dose (internal dose) for the public during the time of the accident and their evacuation from the area in what is now the 30 km evacuation zone around the plant has been estimated (based on ground deposition of caesium-137) to be between 3 and 150 mSv. Thyroid doses for adults around the Chernobyl area were estimated to be between 20 and 1000 mSv, while for one-year-old infants, these estimates were higher, at 20 to 6000 mSv. For