Organically bound tritium (OBT) for various plants in the vicinity of a continuous atmospheric tritium release

Vichot, L.; Boyer, Claudine; Boissieux, T.; Losset, Y.; Pierrat, D.

doi:10.1016/j.jenvrad.2008.05.004

Cited by 41 publications

(8 citation statements)

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“…In both cases an increase in conversion rate appears at the stage of higher growth rate, which means that the importance of OBT integration depends on the biological stage of the plants. This result is consistent with experiments conducted by Atarashi-Andoh [4] on young and old leaves of komatsuna and cherry tomato, and with previous work done by our laboratory [11].…”

Section: Calculation Of Conversion Ratesupporting

confidence: 93%

“…The results averaged 0.16% · h −1 in both experiments, which is consistent with the order of magnitude for many vegetables as stated in the literature [4]. Moreover, it agrees with previous results obtained by our laboratory: 0.20 and 0.24% · h −1 for experiments on "Rouge de Grenoble" lettuces [10,11]. The slight differences in the final conversion rates between our previous experiments and this study can be accounted for by the changes in lettuce variety and in some environmental conditions (climatic data, soil nature, etc.).…”

Section: Calculation Of Conversion Ratesupporting

confidence: 92%

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Variations of conversion rate from Tissue Free Water Tritium to Organically-Bound Tritium in lettuces continuously exposed to atmospheric HT and HTO

et al. 2009

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Abstract.To document the tritium uptake following chronic atmospheric exposure, potted lettuces (Lactuca sativa L.) were cultivated outdoors in the vicinity of a nuclear facility. During two sets of experiments performed in spring and autumn, the plants were continually exposed to low tritium levels throughout growth. These experiments factored in meteorological data, tritium monitoring in air (HT and HTO) and analysis of Tissue Free Water Tritium (TFWT) and Organically-Bound Tritium (OBT) in biological material. The global conversion rate of HTO to OBT in plants averaged 0.16% · h −1 over the growing period, but marked variations were observed during growth. In particular, a significant increase appeared at the exponential growth stage. Consequently, the usual predictive models (for cases of accidental or chronic exposure to tritium) should factor in the conversion rate according to the biological stage. Moreover, as plant growth is closely correlated to total energy received, meteorological parameters (temperature, light intensity) may be considered reliable indicators of growth.

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Section: Calculation Of Conversion Ratesupporting

confidence: 93%

Section: Calculation Of Conversion Ratesupporting

confidence: 92%

Variations of conversion rate from Tissue Free Water Tritium to Organically-Bound Tritium in lettuces continuously exposed to atmospheric HT and HTO

et al. 2009

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“…Des campagnes annuelles de mesures du tritium incorporé dans la matière organique des végétaux sont également réalisées. Des études à caractère scientifique sont par ailleurs régulièrement menées (Vichot et al, 2007 ;Vichot et al, 2008 ;Boyer, 2009 ;Boyer et al, 2009aBoyer et al, , 2009b.…”

Section: Contexteunclassified

Apports de la surveillance du centre CEA-Valduc sur la connaissance des transferts de l’eau tritiée atmosphérique dans les différents compartiments de l’environnement

Goff

Boyer

2013

Radioprotection

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“…The existing studies mainly focus on the routine release and short atmospheric HTO exposure at daytime [4,[11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Little information is currently available regarding the tritium uptake and subsequent formation of organically bound tritium (OBT) in plants exposed to elevated levels of atmospheric tritium during the nighttime [24].…”

Section: Introductionmentioning

confidence: 99%

Tritium concentration in soybean plants exposed to atmospheric HTO during nighttime and daytime

Shen

Liu

2016

NUCL SCI TECH

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Potted soybean plants were exposed to evaporate HTO for 1 h inside an exposure box at two different growth stage (flowering and podding stage, filling stage) during nighttime and daytime. The concentration of tissuefree water tritium (TFWT) and organically bound tritium (OBT) in leaves and beans was measured at the end of the exposure. The results indicated that the quasi-equilibrium between the TFWT concentrations in the soybean leaves and the HTO concentration of the ambient air moisture required more than 1 h to be reached. The relative TFWT concentrations in the nighttime represent about 1/2 to 2/3 of the concentrations obtained in the day in the leaves compared to about 1/2 to 4/3 in the beans. The relative OBT concentrations under night conditions were about 2/5 to 1/2 of those under day conditions in the leaves, contrary to 1/2-7/10 for the beans. By developing tritium concentration assessment model with a short-term release of atmospheric HTO, we comprehensively considered the plant growth stage and the environmental conditions.

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Organically bound tritium (OBT) for various plants in the vicinity of a continuous atmospheric tritium release

Cited by 41 publications

References 31 publications

Variations of conversion rate from Tissue Free Water Tritium to Organically-Bound Tritium in lettuces continuously exposed to atmospheric HT and HTO

Variations of conversion rate from Tissue Free Water Tritium to Organically-Bound Tritium in lettuces continuously exposed to atmospheric HT and HTO

Apports de la surveillance du centre CEA-Valduc sur la connaissance des transferts de l’eau tritiée atmosphérique dans les différents compartiments de l’environnement

Tritium concentration in soybean plants exposed to atmospheric HTO during nighttime and daytime

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