Investigation of the Natural Occurring Radioactive Material (NORM) in the cyprinus carpio fishes breeding in artificial lakes of Baghdad governorate

The steady consumption of fish led many researchers to study it preferences over other foods, especially for radioactivity content. The specific activity concentration (S.A) of natural occurring radioactive materials (NORM) have been measured for Cyprinus carpio fishes collected from several industrial fishes' lakes located in Baghdad governorate using gamma spectroscopy doped with high purity germanium coaxial detector (HPGe). Thirteen fishes' samples were collected from industrial lakes, three samples were collected from cages, and two samples were collected from Trigger River. The last two types of samples were collected in order to compare the results with it. The measured overall averages of S.A for Ra-226, Th-232, and K-40 were 58.9 Bq/kg, 14.1 Bq/kg, and 388.6 Bq/kg, respectively. Some radiation health hazard indices have been estimated, such as the annual effective ingestion dose for an adult member of the public due to the intake of radionuclide through ingestion of fish (H). The results of H showed that the cage fish is better than river fishes and lakes fishes. However, the results of S.A and H strongly suggested that the studied fish is safe to use for human consumption from radiological point of view.

Assesment and evaluation of excess lifetime cancer risk for Occupants of university of Uyo permanent campus, Nigeria

This paper presents the results of ambient radioactive radiation, radiation health hazard indices and excess lifetime cancer risk estimation within University of Uyo campus, Use Offot, Uyo, Niger Delta region of Nigeria. Mean annual outdoor and indoor equivalent doses of 0.284mSv/yr. and 0.854mSv/yr. respectively were recorded, being less than 1mSv/yr. maximum recommended limit for general public. Mean annual outdoor and indoor effective doses of 0.174mSv/yr. and 0.645mSv/yr. respectively with a total of 0.819mSv/yr. were computed. The mean outdoor and indoor ELCR values of 0.61x10-3 and 2.26 x 10-3 respectively, with a mean total of 2.87 x 10-3 were also computed. The results though higher than the world’s average, are comparable with those of some other locations within the Niger Delta region.