Spatial distribution of gamma radioactivity levels and radiological hazard indices in the East Coastal sediments of Tamilnadu, India with statistical approach

Assessments of radioactivity concentration of natural radionuclides and radiological hazard indices in sediment samples from the East coast of Tamilnadu, India with statistical approach

“…In order to facilitate the calculation of dose rates in air from different combinations of the three radionuclides in sediments and by applying the appropriate conversion factors, an activity utilization index (AUI) is constructed for the usage of construction materials that is given by the following formula (Chandrasekaran et al, 2014;Ravisankar et al, 2014b) AUI…”

“…The additional or extra risk of developing cancer is due to exposure to a toxic substance incurred over the lifetime of an individual (Ravisankar et al, 2014b). The excess lifetime cancer risk (ELCR) is calculated using the equation: Log-normal Log-normal Normal Fig.…”

Natural radioactivity measurements and evaluation of radiological hazards in sediment of Oguta Lake, South East Nigeria

“…Organs with rapidly dividing cells such as gonads, the active bone marrow and bone surface cells are considered as organs of interest by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR, 1998). The annual gonadal dose equivalent due to specific activities of 226 Ra, 232 Th and 40 K was estimated using the following formula (Hassan et al, 2010, Isinkaye andAgbi, 2013 Q1 , Ravisankar et al, 2014):…”

“…The probability or extra risk of developing lung cancer due to exposure to gaseous radionuclides indoors incurred over the lifetime of an individual is estimated using the excess lifetime cancer risk (ELCR). Based upon calculated J o u r n a l o f R a d i a t i o n R e s e a r c h a n d A p p l i e d S c i e n c e s x x x ( 2 0 1 5 ) 1 e1 1 values of annual effective dose (AEDE), ELCR was estimated using the following formula (Qureshi et al, 2014;Ravisankar et al, 2014):…”

Lifetime Cancer Risk of Gamma Radioactivity Results from Smoking

“…Total annual effective dose resulting from activity concentration of 226 Ra, 232 Th, and 40 K ranged from 0.39 to 2.9 (average 1.7) mSv y -1 , which is lower than the total average worldwide exposure to natural radiation sources of 2.4 mSv y -1 and higher than the part due to inhalation which is 1.26 mSv y -1 [6]. suggesting that their content in coal are mostly influenced and controlled by similar origin of sources [27,28].…”