Medical Radiology and Radiation Safety. 2026. Vol. 71. № 2

DOI:10.33266/1024-6177-2026-71-2-48-52

S.S. Sokolnikova, N.R. Kabirova, P.V. Okatenko

The Offspring of the Liquidators of the Consequences
of Mayak PA Accident in 1957: the Cohort Composition

Southern Urals Federal Research and Clinical Center of Medical Biophysics, Ozyorsk, Russia

Contact person: S.S. Sokolnikova, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT

Purpose: To compose and to give characteristics of the cohort of the 1^st generation offspring of men who took part in liquidation of the consequences of the 1957 accident at Mayak PA.

Material and methods: The Registry of individuals who took part in liquidation of the consequences of Mayak PA accident in 1957 and the Registry of Ozyorsk residents exposed to anthropogenic radiation in childhood due to operation of the first nuclear facility in Russia were the sources of information. 

Results: A cohort of the 1^st generation offspring of male liquidators of 1957 accident was composed and described. The number of children born in 1958‒1992 is 4753 individuals. The life status is determined for 98.9 %. It was stated that 25.6 % of the children were born in the years of the accident liquidation, when maximum dose loads for the liquidators were observed. For the epidemiological study the groups were composed according to preconception doses of radiation exposure of men; at that, the mothers weren’t in contact with ionizing radiation sources. It was stated that the fathers of 13.0 % of the children had received doses over 500.0 mGy. The study cohort allows to perform epidemiological analyses of the effects of accidental exposure of the fathers. 

Keywords: liquidators of the consequences of an accident 1957, Mayak PA, the 1^st generation offspring, cohort, medical-dosimetry registry, preconception exposure

For citation: Sokolnikova SS, Kabirova NR, Okatenko PV. The Offspring of the Liquidators of the Consequences of Mayak PA Accident in 1957: the Cohort Composition. Medical Radiology and Radiation Safety. 2026;71(2):48–52. DOI:10.33266/1024-6177-2026-71-2-48-52

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Conflict of interest. The authors declare no conflict of interest.

Financing. The study had no sponsorship.

Contribution. Article was prepared with equal participation of the authors.

Article received: 20.01.2026. Accepted for publication: 25.02.2026.