According to the experts, the increase in the radiation level was expected on the night of August 11 and August 12. That could have affected Ukraine's eastern and southeastern regions.
"The radiometric network of Ukraine's hydrometeorological service has been switched to a high-readiness mode, with regular radiometric measurements being conducted: the gamma exposure rate was measured four times per 24 hours (00:00, 06:00, 09:00, 18:00 UTC); precipitation measurements were conducted on a daily basis. The atmosphere aerosol probes were taken in Kyiv, Snovsk and Chornobyl - each day, every 12 hours", the message said.
Scientists measured the contamination levels in the atmosphere in Kyiv and six regions of Ukraine - Sumy, Kharkiv (northern Ukraine), Luhansk, Donetsk (eastern Ukraine) and Odesa regions (southern Ukraine); no extra radionuclides were found in the air probes.
Five workers of Rosatom enterprise died in an explosion of a nuclear reactor not far from Nyonoksa settlement in northern Russia's Arkhangelsk oblast on August 8. It appeared that the Russian military tested a new nuclear-capable cruise missile Burevestnik. The Russian officials specified that the tragedy took place not on the coastal part of the testing ground there, but in the White Sea. Preparations for the testing of new weapons lasted for over a year.