Research output: Contribution to Journal/Magazine › Journal article
Research output: Contribution to Journal/Magazine › Journal article
}
TY - JOUR
T1 - Modelling and measurement of the dispersion of radioactive emissions from a nuclear fuel fabrication plant in the U.K.
AU - Al-Khayat, T. A. H.
AU - van Eygen, B.
AU - Hewitt, CN
AU - Kelly, M. R.
PY - 1992
Y1 - 1992
N2 - The ground-level air concentrations of supported and total 234Th were determined over a period of 1 year at four sites in the vicinity of a nuclear fuel fabrication plant in northwest England. Both supported and unsupported 234Th were found, with mean monthly concentrations of total 234Th 13 times those observed at a control site 50 km north of the factory. Bulk deposition rates of total 234Th were found to be 2–3 times the background values. Analysis of mosses revealed a systematic decrease in supported 234Th concentrations with distance from the factory, with background values reached at a distance of about 1.5 km. Road dust samples showed a similar decrease in supported 234Th concentrations with distance, but with significant departures from this trend, possibly being evidence for the mechanical transport of contaminated dust from the factory. A Gaussian plume dispersion model was able to predict 85% of the observed air concentrations within a factor of four, despite large uncertainties in some source parameters.
AB - The ground-level air concentrations of supported and total 234Th were determined over a period of 1 year at four sites in the vicinity of a nuclear fuel fabrication plant in northwest England. Both supported and unsupported 234Th were found, with mean monthly concentrations of total 234Th 13 times those observed at a control site 50 km north of the factory. Bulk deposition rates of total 234Th were found to be 2–3 times the background values. Analysis of mosses revealed a systematic decrease in supported 234Th concentrations with distance from the factory, with background values reached at a distance of about 1.5 km. Road dust samples showed a similar decrease in supported 234Th concentrations with distance, but with significant departures from this trend, possibly being evidence for the mechanical transport of contaminated dust from the factory. A Gaussian plume dispersion model was able to predict 85% of the observed air concentrations within a factor of four, despite large uncertainties in some source parameters.
KW - Uranium
KW - dispersion modelling
KW - radioactivity
U2 - 10.1016/0960-1686(92)90464-V
DO - 10.1016/0960-1686(92)90464-V
M3 - Journal article
VL - 26
SP - 3079
EP - 3087
JO - Atmospheric Environment: Part A - General Topics
JF - Atmospheric Environment: Part A - General Topics
IS - 17
ER -