Activity concentrations of environmental samples collected in Fukushima Prefecture immediately after the Fukushima nuclear accident.

Abstract:

:Radionuclide concentrations in environmental samples such as surface soils, plants and water were evaluated by high purity germanium detector measurements. The contribution rate of short half-life radionuclides such as (132)I to the exposure dose to residents was discussed from the measured values. The highest values of the (131)I/(137)Cs activity ratio ranged from 49 to 70 in the environmental samples collected at Iwaki City which is located to the south of the F1-NPS. On the other hand, the (132)I/(131)I activity ratio in the same environmental samples had the lowest values, ranging from 0.01 to 0.02. By assuming that the (132)I/(131)I activity ratio in the atmosphere was equal to the ratio in the environmental samples, the percent contribution to the thyroid equivalent dose by (132)I was estimated to be less than 2%. Moreover, the contribution to the thyroid exposure by (132)I might be negligible if (132)I contamination was restricted to Iwaki City.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Hosoda M,Tokonami S,Tazoe H,Sorimachi A,Monzen S,Osanai M,Akata N,Kakiuchi H,Omori Y,Ishikawa T,Sahoo SK,Kovács T,Yamada M,Nakata A,Yoshida M,Yoshino H,Mariya Y,Kashiwakura I

doi

10.1038/srep02283

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2283

issn

2045-2322

pii

srep02283

journal_volume

3

pub_type

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