Onderzoek naar de radioactiviteit van oppervlaktewater. Resultaten over 1989
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Series / Report no.
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Type
Report
Language
nl
Date
1990-11-30
Research Projects
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Journal Issue
Title
Onderzoek naar de radioactiviteit van
oppervlaktewater. Resultaten over 1989
Translated Title
Research on the radioactivity of surfacewaters in
the Netherlands. Results for 1989.
Published in
Abstract
Abstract niet beschikbaar
Sr-90-activities in Meuse, Rhine and Roer (about 3.5 Bq/m3) and Westerscheldt (9 Bq/m3) were nearly equal to those in 1988. Activities in the Northsea (up to 17 Bq/m3) were slightly higher than in 1988 and are caused by discharges of nuclear reprocessing plants. Sr-90-activities of the Westerscheldt depend on those of the Northsea. Ra-226- activities in Rhine(4.2 Bq/m3), Roer(15 Bq/m3) and Westerscheldt (38 Bq/m3) were higher than in 1988. That of the Meuse(3.3 Bq/m3) was unchanged. The Ra-226 in Roer and Westerscheldt originate from discharges by coalmines in the FRG respectively discharges of phosphogypsum. The Westerscheldt transported in 1989 approximately 200 GBq Ra-226. In the Westerscheldt and due to phosphogypsum, the activities of Pb-210 (16 Bq/m3) and Po-210 (19 Bq/m3) were higher than in the Meuse, Rhine and Roer (2 to 5 Bq/m3). 20% to 85% of the activities were adsorbed on suspended matter. Po-210-activities were higher than in 1988. In the Northsea, the activities of Cs-134 (< 2 Bq/m3) and Cs-137(7 to 22 Bq/m3) were lower than in 1988. Tritium-activities (1300 up to 2200 BQ/M3) were nearly the same as in 1988.
Sr-90-activities in Meuse, Rhine and Roer (about 3.5 Bq/m3) and Westerscheldt (9 Bq/m3) were nearly equal to those in 1988. Activities in the Northsea (up to 17 Bq/m3) were slightly higher than in 1988 and are caused by discharges of nuclear reprocessing plants. Sr-90-activities of the Westerscheldt depend on those of the Northsea. Ra-226- activities in Rhine(4.2 Bq/m3), Roer(15 Bq/m3) and Westerscheldt (38 Bq/m3) were higher than in 1988. That of the Meuse(3.3 Bq/m3) was unchanged. The Ra-226 in Roer and Westerscheldt originate from discharges by coalmines in the FRG respectively discharges of phosphogypsum. The Westerscheldt transported in 1989 approximately 200 GBq Ra-226. In the Westerscheldt and due to phosphogypsum, the activities of Pb-210 (16 Bq/m3) and Po-210 (19 Bq/m3) were higher than in the Meuse, Rhine and Roer (2 to 5 Bq/m3). 20% to 85% of the activities were adsorbed on suspended matter. Po-210-activities were higher than in 1988. In the Northsea, the activities of Cs-134 (< 2 Bq/m3) and Cs-137(7 to 22 Bq/m3) were lower than in 1988. Tritium-activities (1300 up to 2200 BQ/M3) were nearly the same as in 1988.
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HIMH / Bothof J