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VERA Seminar

The study of radioactive iodine from the Fukushima accident

Maki Honda, Graduate School of Pure and Applied Sciences, University of Tsukuba, Japan

A large amount of the radioactive iodine isotopes 131I (t1/2 = 8.01 d) and 129I (t1/2 = 1.57×107 y) were released into the environment during the Fukushima Dai-ichi nuclear power plant (FDNPP) accident on March 2011. Radioactive iodine is one of the key fission products to be monitored due to the tendency of accumulation in the thyroid gland. There is an ethical obligation of science to serve society, and to help Japanese to better understand what happened, how it happened and why, even though public trust in science was lost in the aftermath of the accident. The study of radioactive iodine from the accident can fulfill this obligation.

Information of environmental radiation monitoring was required in the initial phase of the FDNPP accident in making rational assessment of the radiological consequences to the public. However, in reality, it was not available at that time since monitoring system did not function due to the loss of power supply. Part of the on-site release characteristics and transportation mechanisms have been estimated via long-lived 129I in environmental samples. Two key questions of the macroscopic and microscopic dynamics of 129I have been investigated with large-scale soil and terrestrial water sampling. The results from these studies will be presented in the seminar.


Donnerstag, 10.01.2019    16:30 Uhr

Währinger Str. 17 (Kavalierstrakt, Zugang durch den Hof)
1090 Wien


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