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India: Natural and Fallout Radioactivity Mapping of Kakrapar Gujarat

Credit: DAE (GODL-India) via Wikipedia, modified

Measurement of radioactivity in soil is very important to determine any changes in activity with time as a result of radioactive release.

Researchers in this study present the gamma absorbed dose rates (terrestrial and cosmic) due to the naturally occurring and anthropogenic radionuclides around the Kakrapar Atomic Power station Gujarat site in India.

The activity level (Bq/kg) in the soil ranged 5.7-48.4 for 226Ra, 9.7-28.0 for 232Th, 83.9-585.7 for 40K, and 0.2-4.6 for 137Cs, respectively. The mean concentration levels measured in Kakrapar soil from the naturally occurring radioisotopes are lower than the corresponding global average values.

137Cs activity in the soil is comparable with the preoperational period. The total effective dose rates in air outdoors ranged 17.2-78.1 µSv/y with the mean value of 32.8 µSv/y. The mean value of absorbed dose rate due to cosmic components was 37.5 nGy/h which is comparable to the worldwide reported values.

Natural and fallout radioactivity mapping of Kakrapar Gujarat site, India. Radiation Protection and Environment, 23 October 2021.

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