Historian Volodymyr Viatrovych, after analyzing the declassified KGB documents about the Chornobyl, said that during 1971-1986 the Chornobyl nuclear power plant saw numerous accidents and radiation leaks, but information about these facts was classified, and the Communist Party called "spreading rumors" as disinformation.

According to UKRINFORM, Viatrovych says that during the period of operation from 1977 to 1981, 29 emergency shut-downs occurred at the nuclear power plant as a result of the fault of staff, and due to failures of major equipment.

The KGB kept constant supervision of the Chornobyl NPP as a strategic object, but even the crying reports of security officers were ignored by the intelligence apparatus, and too meticulous officers were even rebuked for "disinformation of the [Communist] party".

Neither the Chornobyl nuclear power plant workers, nor residents of nearby towns were told about a major radioactive leakage on April 20, 1981, or about the September 1982 crash at Reactor 1.

According Viatrovych, after the 1982 accident the experts were speaking about the excess of the permissible level of radiation hundreds of times. The identified "hot" particles were dangerous to humans, and could lead to serious complications, including death due to "burning" of body tissues. Instead, the chief of the KGB department in the Ukrainian Soviet Socialistic Republic S. Mukha informed Shcherbytsky [first secretary of the Communist Party Central Committee - ed.] not about health improvement measures, but only about the information consequences of the accident: "The situation at the plant and the surrounding areas is normal. Facts about spread of panic rumors are not observed".

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