Major Factors Affecting Weathering Half-lives of Iodine-131 and Radiocaesium in Leafy Vegetables Directly Contaminated by Fukushima Dai-ichi Nuclear Power Plant Accident Fallout (2) Comparison of the Weathering Half-Lives Observed for Herbaceous Plants After the Chernobyl and the Fukushima Nuclear Accidents

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  • Tagami Keiko
    National Institutes for Quantum and Radiological Science and Technology, Quantum Medical Science Directorate, National Institute of Radiological Sciences
  • Uchida Shigeo
    National Institutes for Quantum and Radiological Science and Technology, Quantum Medical Science Directorate, National Institute of Radiological Sciences

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  • 東京電力福島第一原子力発電所事故由来のI-131及び放射性セシウムの葉菜類のウェザリング半減期の主要因に関する考察(2)チェルノブイリ原発事故後における草本植物ウェザリング半減期との比較
  • トウキョウ デンリョク フクシマ ダイイチ ゲンシリョク ハツデンショ ジコ ユライ ノ I-131 オヨビ ホウシャセイ セシウム ノ ヨウサイルイ ノ ウェザリング ハンゲンキ ノ シュヨウイン ニ カンスル コウサツ(2)チェルノブイリ ゲンパツ ジコ ゴ ニ オケル ソウホン ショクブツ ウェザリング ハンゲンキ ト ノ ヒカク

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Abstract

<p>To compare weathering half-life (Tw) values of radionuclides in leafy vegetables observed just after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, we carried out literature survey to calculate Tw values from time-dependent radioactivity concentration data in Japanese herbaceous plants observed after the Chernobyl Nuclear Power Plant (ChNPP) accident. The geometric mean Tw value for 131I was 19.1 d and that for 137Cs was 18.4 d for herbaceous plants in Japan after the ChNPP accident; no significant difference was observed between the Tw values of these radionuclides. When Tw values obtained after the FDNPP accident were compared with those obtained after the ChNPP accident in Japan, the values were significantly shorter for both radionuclides; however, Tw values from the FDNPP accident were similar to those from the ChNPP accident obtained in European countries including Russia.</p>

Journal

  • RADIOISOTOPES

    RADIOISOTOPES 69 (11), 353-364, 2020-11-15

    Japan Radioisotope Association

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