Impacts of C-uptake by plants on the spatial distribution of $$^{14}$$C accumulated in vegetation around a nuclear facility; Application of a sophisticated land surface $$^{14}$$C model to the Rokkasho reprocessing plant, Japan
植物の炭素取り込みが原子力施設近傍における植生中$$^{14}$$C蓄積の空間分布に及ぼす影響; 精緻な陸面$$^{14}$$Cモデルの六ヶ所再処理工場への適用
太田 雅和; 堅田 元喜; 永井 晴康; 寺田 宏明
Ota, Masakazu; Katata, Genki; Nagai, Haruyasu; Terada, Hiroaki
Impacts of plant C uptake on ($$^{14}$$C) distributions around a nuclear facility were investigated by a land surface $$^{14}$$C model (SOLVEG-II). The simulation combined the SOLVEG-II with a mesoscale model and an dispersion model was applied to $$^{14}$$CO$$_{2}$$ transfer at test operations of the Rokkasho reprocessing plant (RRP) in 2007. The calculated $$^{14}$$C-specific activities in rice grains agreed with the observations. Numerical experiment of chronic $$^{14}$$CO$$_{2}$$ release from the RRP showed that $$^{14}$$C-specific activities of rice plants at harvest differed from the annual mean ones in the air, which was attributed to seasonal variations in atmospheric $$^{14}$$CO$$_{2}$$ and plant growth. $$^{14}$$C accumulation in plant significantly increased when $$^{14}$$CO$$_{2}$$ releases were limited during daytime, compared with the results observed during nighttime, due to extensive $$^{14}$$CO$$_{2}$$ uptake by daytime photosynthesis. These results indicated that plant growth and photosynthesis should be considered in predictions of ingestion dose of $$^{14}$$C for long-term chronic and short-term diurnal releases of $$^{14}$$CO$$_{2}$$, respectively.
使用言語 : English
掲載資料名 : Journal of Environmental Radioactivity
: 162-163
ページ数 : p.189 - 204
発行年月 : 2016/10
出版社名 : Elsevier
特許データ :
論文URL :
キーワード : 炭素14; 光合成; ; 陸面モデル; 大気拡散モデル; 被ばく評価
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : AA20150875
抄録集掲載番号 : 45000020
論文投稿番号 : 18356
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Environmental Sciences
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