Dynamics of gamma radiation levels and formation of external exposure dose

From the first day after the accident, gamma radiation fields throughout the country were systematically observed and data collected and analysed. In the first stage, the availability of such dynamic data for each population centre made it possible to obtain reliable estimates of external exposure doses to the population up to the time of evacuation, which, in the majority of centres evacuated, did not exceed 0.1 Gy and in the others did not exceed level B (0.75 Gy) taken as the upper level. The decontamination measures carried out made it possible to reduce the exposure dose by a factor of 1.3-2.5 in comparison with the anticipated doses for different occupational and age groups. The maximum reduction was noted in children. (author). 10 figs, 3 tabs.


Logachev, V.A.; Los', I.P.; Parkhomenko, V.I.; Savkin, M.N.; Titov, A.V.


chernobylsk-4 reactor; decontamination; dose rates; evacuation; external irradiation; gamma radiation; man; radiation accidents; radiation doses; accidents; animals; cleaning; electromagnetic radiation; enriched uranium reactors; graphite moderated reactors; ionizing radiations; irradiation; lwgr type reactors; mammals; power reactors; primates; radiations; reactors; thermal reactors; vertebrates

Subject Category

Actual Accidents


Report; International Atomic Energy Agency, Vienna (Austria); Medical aspects of the Chernobyl accident; IAEA-TECDOC--516.; Jul 1988.; 381 p.; p. 183-194.

Place of Publication

International Atomic Energy Agency (IAEA)


Available from INIS in electronic form.