Radionuclide fluxes at a plant manufacturing dicalcium phosphate for domestic animals

Health and environmental impacts of a fertilizer plant – Part II: Assessment of radiation exposure

“…Finally it shall be noted that the estimates of contributions due to radon inhalation (0.3e0.4 mSv y ÿ1 on an average) are very similar in both studies. In the study by Ga¨fvert et al (2001) concerning a plant manufacturing dicalcium phosphate, the estimated doses to the workers are considerably lower than those indicated in the present study. This is probably due to the higher number of hours spent by the workers of the Italian plant in production areas and warehouses.…”

40K, 226Ra AND 228Ra SERIES IN BOVINE AND POULTRY FEED AND IN DICALCIUM PHOSPHATE (DCP) SAMPLES BY GAMMA-RAY SPECTROMETRY

“…As for feeds, radioactive equilibrium in decay series is also not expected for DCP, since its industrial manufacturing processes can cause separation between the Radium and Uranium (Gäfvert (2001)). Radionuclides used to determine the activity of natural series and subseries were the same as in feed samples By the results obtained for DCP, one sees that the activity of 226Ra is much greater than the activity for Thorium series.…”

Impact of industries in the accumulation of radionuclides in the lower part of Ebro river (Catalonia, Spain)

“…Their origin can be associated with the use of fertilisers for agricultural purposes and with other industrial activities, and in this case, the influence of the DCP located in Flix can be demonstrated. Gäfvert et al (2001) reported that 40 K concentrations are associated with impurities such as sand and clay which are removed from the phosphate rocks before the phosphate rock is delivered to the processing plant of the DCP.…”