Selected natural and fallout radionuclides in plant foods around the Kudankulam Nuclear Power Project, India

► Fallout radionuclides (90Sr and 137Cs) were below the limit of detection. ► 228Ra activities were higher than 226Ra activity concentrations. ► 'Pulses' group (leguminous grains) was the highest accumulator of radium nuclides. ► 228Ra transfer factor was higher in few groups while 226Ra was higher in others.