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Digital Archive International History Declassified

April 28, 1986

UNTITLED REPORT BY LT. COL. V.P. ALEKSEYEV AND MAJOR V.D. KOHAN ON RADIATION LEVELS

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    Info on radiactive fallout, and that Kiev is currently safe and being observed by experts, while Pripyat has 30-160 micro roentgens/sec, and Rivne Oblast has 820 micro roentgens per hour. From emergency 91 hospitalized people sent to Moscow, and 54 to Kiev and Kiev Oblast.
    "Untitled report by Lt. Col. V.P. Alekseyev and Major V.D. Kohan on Radiation Levels," April 28, 1986, History and Public Policy Program Digital Archive, Archive of the Ukrainian National Chornobyl Museum. Contributed by Anna Korolevska and Adam Higginbotham. Originally obtained from the Sectoral State Archive of the Ministry of Internal Affairs of Ukraine. Translated by Gary Goldberg. https://digitalarchive.wilsoncenter.org/document/208408
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MEMO

The radioactive contamination of the area is being measured in milliroentgens/hour (one thousandth of a roentgen) and roentgens/hour.

The permissible one-time radiation dose (per civil defense norms) in peacetime conditions is 17 roentgens for the civilian population, 50-70 roentgens for military personnel.

For AS [possibly, Emergency Service] personnel in accordance with radiation safety norms the established maximum permissible dose of irradiation a year is 5 Behr (biological equivalent roentgens).

As of 1200 28 April there is no background radiation in Kiev (air, water).

Monitoring of the state of the water region in Kiev is being done by the Kiev City, Oblast', and republic SEhS [probably Sanitary and Epidemiological Service], the radiometric services of the UkSSR Academy of Sciences and the medical institute, and also oblast' sanitary and epidemic stations (Cherkassy, Chernigov, Kirovograd, Dnepropetrovsk, Poltava, Zaporozh'ye, Nikolayev, and Kherson) along the course of the Dnepr River.

Monitoring of the air space in the city of Kiev is being done by the hydrometeorological service of Kiev and Zhitomir Oblasts (eight stations).

At the present time a level of gamma radiation of 30-160 microroentgens a second is being recorded in the city of Pripyat', which corresponds to approximately 0.57 roentgens per hour (that is, in accordance with the norms of radiation safety a person receives in 10 hours of irradiation for AS personnel).

According to information available in the UkSSR Civil Defense Staff the background air radiation has somewhat risen in Rovno Oblast' (820 microroentgens per hour), which is explained by a displacement of the air space.

Ninety-one persons have been sent to Moscow from the location of the incident and 54 to Kiev and Kiev Oblast'.

Deputy Chief of the

2nd Department of the

3rd Directorate of the USSR KGB [signature] V. P. Alekseyev

Lt. Col.

Senior investigator of the 3rd

Department of the 6th Directorate

of the USSR KGB Major [signature] V. D. Kokhan

[undated] April 1986

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