International Journal of Low Radiation (3 papers in press)
Studies on cancer mortality and incidents due to the natural background radiation in Poland
by Monika Szołucha, Krzysztof Fornalski
Abstract: The paper presents ecological studies of the cancer mortality and incidents due to the natural background radiation for both women and men groups in all voivodeships in Poland in 2012. The potential correlation between local annual effective dose rates from natural sources and cancer mortality ratio (CMR), cancer incidents ratio (CIR) and relative risk (RR) are analysed. All results are generally inconsistent and show both increase and decrease of CMRs, CIRs and RRs. However, the presented contradiction in trends of mortalities and incidents is statistically non-significant. Additionally, the data were adjusted to six confounding factors: people aged 70 or older, number of regular daily smokers, etc. Based on these results, there is no regular trend observed for cancers related to natural background radiation in Poland, thus the popular linear no-threshold (LNT) hypothesis is not an accurate description of cancer risk prediction related to natural backround radiation.
Keywords: natural background radiation; cancer mortality; lung cancer; cancer mortality ratio; cancer incidents ratio; Poland; Bayesian.
Assessment of excess-lifetime cancer risk and radioactive heat production from waste dumpsites in three cities in southwestern Nigeria
by Ebenezer Faweya, Adesakin Elijah, Akande Taiwo, Olowomofe Olawale, Adewumi Taiwo, Agunbiade Gbenga
Abstract: Radiation exposures at various dumpsites around three cities located in southwestern Nigeria were assessed by gamma ray spectroscopy using a highly shielded Canberra NaI (Tl) detector. Soil samples were collected for analysis at the municipal waste dumpsites and locations that are free from dumpsites to serve as control. The average activity concentrations obtained for 40K were 535
Keywords: excess lifetime cancer risk; gamma radiation; radioactive hazard; radioactive heat production ; soils; waste dumpsites; Nigeria.
Determination of radioactive isotopes and some physiochemical parameters in five rivers in South Ondo State, Nigeria
by Thompson Ediagbonya, Olamide Gbolahan
Abstract: In this study, river samples from five different locations were analysed for the presence of radioactive isotopes, along with some physiochemical parameters. The mean values of the radioactive isotopes in all the locations are: in Igbokoda, K-40 (Bq/L), 7.37; U-238(Bq/L), 0.66; Th-232(Bq/L), 1.19, Ra-226(Bq/L), BDL; Igodan, K-40 (Bq/L), 3.50; U-238(Bq/L), 0.80; Th-232(Bq/L), BDL, Ra-226(Bq/L), BDL; Erinje, K-40 (Bq/L), 10.30; U-238(Bq/L), 0.0.30; Th-232(Bq/L), 1.27, Ra-226(Bq/L), 0.90; Irele, K-40 (Bq/L), 3.50; U-238(Bq/L), 0.14; Th-232(Bq/L), 0.77, Ra-226(Bq/L), BDL; Okitipupa, K-40(Bq/L), 9.63; U-238(Bq/L), 0.74; Th 232(Bq/L), 1.03, Ra-226(Bq/L), BDL. The mean conductivity, pH, TSD, and temperature of the various locations are: Igbokoda, 140
Keywords: radioactivity; nuclei; natural; half-life; hazard.