Results 141 to 150 of about 1,206 (184)

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

Journal of Environmental Radioactivity, 2008
In order to quantify tritium impact on the environmental, we studied vegetation continuously exposed to a tritiated atmosphere. We chose lichens as bio-indicators, trees for determination of past tritium releases of the Valduc Centre, and lettuce as edible vegetables for dose calculation regarding neighbourhood.
Vichot*, L., Boyer, Claudine, Boissieux, T., Losset, Y., Pierrat, D.   +4 more
openaire   +5 more sources

Method validation and uncertainty evaluation of organically bound tritium analysis in environmental sample

Journal of Environmental Radioactivity, 2014
The analytical method for organically bound tritium (OBT) was developed in our laboratory. The optimized operating conditions and parameters were established for sample drying, special combustion, distillation, and measurement on a liquid scintillation spectrometer (LSC).
Yan-Jun Huang, Fan Zeng, Bing Zhang, Chao-Feng Chen, Hong-Juan Qin, Lian-Sheng Wu, Gui-Yin Guo, Li-Tao Yang, Zhi-Hong Shang-Guan   +8 more
openaire   +4 more sources

Enhanced activities of organically bound tritium in biota samples

Applied Radiation and Isotopes, 2014
A pilot study aimed on possible occurrence of elevated activity of non-exchangable organically bound tritium (NE-OBT) in biota was performed. The first results showed a significant surplus of NE-OBT activity in biota of the valley of Mohelno reservoir and Jihlava river.
I, Svetlik, M, Fejgl, I, Malátová, L, Tomaskova   +3 more
openaire   +3 more sources

THEORETICAL ORGANICALLY BOUND TRITIUM DOSE ESTIMATES

Health Physics, 2004
This paper illustrates a theoretical approach to estimating the dose associated with the ingestion of both organically bound tritium and tissue free water tritium relative to the ingestion of only tissue free water tritium. Organically bound tritium, specifically non-exchangeable OBT, can result in an increased dose relative to that from exchangeable ...
T A, DeVol, B A, Powell
openaire   +2 more sources

Development of an organically bound tritium standard

Applied Radiation and Isotopes, 2004
High-concentration factors between seawater and marine organisms have been observed for organically bound tritium (OBT). The absence of an available OBT standard impedes the validation of an analytical method for environmental samples. This paper describes the secondary standardisation of tritiated thymidine, which was chosen to act as an OBT standard,
A V, Harms, S M, Jerome
openaire   +2 more sources

Metabolism of Organically Bound Tritium in Man

Radiation Research, 1984
The classic methodology for estimating dose to man from environmental tritium assumes that all tritium, whether organically bound or free, enters directly into man's free body water compartment and is uniformly distributed as tritiated water. This methodology ignores the fact that organically bound tritium in foodstuffs may be directly assimilated in ...
E L, Etnier, C C, Travis, D M, Hetrick
openaire   +2 more sources

Organically Bound Tritium Analysis in Environmental Samples

Fusion Science and Technology, 2015
Many methods allow analysing the various forms of tritium in environmental samples; however, there are no published standard methods for measuring organically bound tritium (OBT). Furthermore, there are no certified reference materials of OBT for environmental samples.
Baglan, N., Kim, S.B., Cossonnet, C., Croudace, I.W., Fournier, M., Galeriu, D., Warwick, P.E., Momoshima, N., Ansoborlo, E.   +8 more
openaire   +2 more sources

Organically bound tritium level in vegetation at ICIT tritium removal facility

Journal of Radioanalytical and Nuclear Chemistry, 2014
In order to evaluate the impact of tritium on wild vegetation around ICIT we have monitored the tritium concentrations in precipitation, air, soil, grass and green wheat from a specific area near the tritium removal facility during vegetation periods in 2012–2013.
Irina Vagner, Carmen Varlam, Ionut Faurescu, Denisa Faurescu   +3 more
openaire   +1 more source

Canadian inter-laboratory organically bound tritium (OBT) analysis exercise

Journal of Environmental Radioactivity, 2015
Tritium emissions are one of the main concerns with regard to CANDU reactors and Canadian nuclear facilities. After the Fukushima accident, the Canadian Nuclear Regulatory Commission suggested that models used in risk assessment of Canadian nuclear facilities be firmly based on measured data.
S B, Kim, J, Olfert, N, Baglan, N, St-Amant, B, Carter, I, Clark, C, Bucur   +6 more
openaire   +2 more sources

The human body retention time of environmental organically bound tritium

Journal of Radiological Protection, 2009
Tritium in the UK environment causes low radiation doses to the public, but uncertainty exists in the dose coefficient for the organically bound component of tritium (OBT). This can affect the assessment of effective doses to representative persons. Contributing to that uncertainty is poor knowledge of the body retention time of OBT and how this varies
John, Hunt, Trevor, Bailey, Allan, Reese
openaire   +2 more sources