Methods, results and dose consequences of 106Ru detection in the environment in Budapest, Hungary

Publication date: December 2018

Source: Journal of Environmental Radioactivity, Volume 192

Author(s): Dorottya Jakab, Gáborné Endrődi, András Kocsonya, Annamária Pántya, Tamás Pázmándi, Péter Zagyvai

Abstract

From late September to early October of 2017, the majority of European networks involved in environmental radiological monitoring – including the environmental monitoring system of the KFKI Campus in Budapest – detected ¹⁰⁶Ru isotope of artificial origin in the atmosphere. The reported values higher than the minimum detectable activity (MDA) concentrations were in the range of 0.8 μBq/m³ – 145 mBq/m³. Based on the results of environmental measurements and the available meteorological data, assessments were made to analyze concentration levels of ¹⁰⁶Ru activity and to help understand the behavior of radioruthenium in various environmental media. Evaluation of the daily variation of activity levels indicated a maximum of 4 day-long residence time of ¹⁰⁶Ru contamination presence in ground level air in Budapest. An average ¹⁰⁶Ru activity concentration of 25.6 ± 1.4 mBq/m³ have been observed for the estimated residence time of ¹⁰⁶Ru in the air. Deposition of ¹⁰⁶Ru was dominantly influenced by rainfall, the major contributor wet deposition which led to an average of 11.3 ± 1.3 Bq/m² deposition on the ground surface prior to plume passage.

Graphical abstract

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