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Table 2. Values of A and B in Eqv. 1 from liquid discharges of various radionuclides to the sea from the nuclear repro-cessing plants Sellafield and La Hague. La Hague (Table 1) Sellafield (Aarkrog et al. 1983-85) Radionuclide ABA 60 Co 1.02 2100 0.84 216 90Sr -- 1.12 7040 99Tc 0.67 18800 0.62 46000 106R u 0.63 315 - -137Cs --0.94 23000 239,240p u 0.61 2.71.04 1520 The equations were based on samples collected out to a di-stance of approximately 1000 km from the source. The back-grounds (from Sellafield and global fallout) of 90 Sr and 137Cs in the English Channel do not make it possible to calculate meaningful distance equations for these radionuclides for La Hague. In the calculation of the distance relations we normalized all seaweed data to Fucus vesiculosus. We used the following ratios for 99 Tc (calculated from Table 1): Ascophyllum/ves.: 1.41; serratus/ves.: 0.64; spiralis/ves.: 0.55 and pelvetia/ves. = 0.81. In a similar way the other radionuclides studied were normalized to Fucus vesiculosus. The distance relations may vary with time. If the discharges of a nuclide increase from year to year, A in Table 2 will increase, and if the annual discharges show a de-creasing tendency A will decrease. It is however remarkable that the A-values in Table 2 are so similar; they all lie between 0.6 and 1.1. This shows that the coastal currents in the North Sea region run over relatively long distance without any appreciable mixing with the open sea. From Table 2 we may estimate the discharges from La Hague rela-tive to those from Sellafield. We assume that the Fucus samples collected at the Channel coast in the first half of 1985 repre-sented La Hague releases from 1983 and 1984, and the samples from the Scottish coastline in June 1982 were related to Sella-field discharges in 1980-81. If we divide the distance inte-grals: 1000 2Tx.B.xAdx for La Hague (H) with those from Sellafield(S) 1 we find for 99 Tc: H/S = 0.30, for 60 Co H/S = 3.3 and for
DOI link for Table 2. Values of A and B in Eqv. 1 from liquid discharges of various radionuclides to the sea from the nuclear repro-cessing plants Sellafield and La Hague. La Hague (Table 1) Sellafield (Aarkrog et al. 1983-85) Radionuclide ABA 60 Co 1.02 2100 0.84 216 90Sr -- 1.12 7040 99Tc 0.67 18800 0.62 46000 106R u 0.63 315 - -137Cs --0.94 23000 239,240p u 0.61 2.71.04 1520 The equations were based on samples collected out to a di-stance of approximately 1000 km from the source. The back-grounds (from Sellafield and global fallout) of 90 Sr and 137Cs in the English Channel do not make it possible to calculate meaningful distance equations for these radionuclides for La Hague. In the calculation of the distance relations we normalized all seaweed data to Fucus vesiculosus. We used the following ratios for 99 Tc (calculated from Table 1): Ascophyllum/ves.: 1.41; serratus/ves.: 0.64; spiralis/ves.: 0.55 and pelvetia/ves. = 0.81. In a similar way the other radionuclides studied were normalized to Fucus vesiculosus. The distance relations may vary with time. If the discharges of a nuclide increase from year to year, A in Table 2 will increase, and if the annual discharges show a de-creasing tendency A will decrease. It is however remarkable that the A-values in Table 2 are so similar; they all lie between 0.6 and 1.1. This shows that the coastal currents in the North Sea region run over relatively long distance without any appreciable mixing with the open sea. From Table 2 we may estimate the discharges from La Hague rela-tive to those from Sellafield. We assume that the Fucus samples collected at the Channel coast in the first half of 1985 repre-sented La Hague releases from 1983 and 1984, and the samples from the Scottish coastline in June 1982 were related to Sella-field discharges in 1980-81. If we divide the distance inte-grals: 1000 2Tx.B.xAdx for La Hague (H) with those from Sellafield(S) 1 we find for 99 Tc: H/S = 0.30, for 60 Co H/S = 3.3 and for
Table 2. Values of A and B in Eqv. 1 from liquid discharges of various radionuclides to the sea from the nuclear repro-cessing plants Sellafield and La Hague. La Hague (Table 1) Sellafield (Aarkrog et al. 1983-85) Radionuclide ABA 60 Co 1.02 2100 0.84 216 90Sr -- 1.12 7040 99Tc 0.67 18800 0.62 46000 106R u 0.63 315 - -137Cs --0.94 23000 239,240p u 0.61 2.71.04 1520 The equations were based on samples collected out to a di-stance of approximately 1000 km from the source. The back-grounds (from Sellafield and global fallout) of 90 Sr and 137Cs in the English Channel do not make it possible to calculate meaningful distance equations for these radionuclides for La Hague. In the calculation of the distance relations we normalized all seaweed data to Fucus vesiculosus. We used the following ratios for 99 Tc (calculated from Table 1): Ascophyllum/ves.: 1.41; serratus/ves.: 0.64; spiralis/ves.: 0.55 and pelvetia/ves. = 0.81. In a similar way the other radionuclides studied were normalized to Fucus vesiculosus. The distance relations may vary with time. If the discharges of a nuclide increase from year to year, A in Table 2 will increase, and if the annual discharges show a de-creasing tendency A will decrease. It is however remarkable that the A-values in Table 2 are so similar; they all lie between 0.6 and 1.1. This shows that the coastal currents in the North Sea region run over relatively long distance without any appreciable mixing with the open sea. From Table 2 we may estimate the discharges from La Hague rela-tive to those from Sellafield. We assume that the Fucus samples collected at the Channel coast in the first half of 1985 repre-sented La Hague releases from 1983 and 1984, and the samples from the Scottish coastline in June 1982 were related to Sella-field discharges in 1980-81. If we divide the distance inte-grals: 1000 2Tx.B.xAdx for La Hague (H) with those from Sellafield(S) 1 we find for 99 Tc: H/S = 0.30, for 60 Co H/S = 3.3 and for
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