Background Gamma Radiation in Nigerian Market Environment

Mineral mining and milling can be a source of national economic and technological development. However, mining of minerals has been confirmed to disturb the natural distribution of radioisotopes in the soil, air and water bodies in the biota. In an attempt to evaluate the radiological burden resulting from tin mining activities at Rayfield-Du area of Jos, the background gamma-radiation level in the mine was measured via a well calibratedhand-held dosimeter placed at 1 m above ground level. The mean absorbed dose rate, annual effective dose rate and excess lifetime cancer risk for the mine was 0.83 μSvh-1; 1.44 mSv-1 and 0.005 respectively. Generally, dose rates were higher in the mine pits and processing areas as compared to administrative areas of the mine. The mean measured dose rate and calculated dose parameters for the mine were all high when compared to the regulatory limit for public exposure. The potential of developing radiation-induced health defects as a result of high radiation absorbed dose rate by the miners and dwellers around the mine is highly probable. Keywords: Gamma-radiation; mine; absorbed dose rate; radiation exposure.

Download Full-text

An insight into the quality of internal built environment in Vladivostok. Part 1: Studying background radiation in residential premises

Stroitel stvo nauka i obrazovanie [Construction Science and Education] ◽

10.22227/2305-5502.2020.4.3 ◽

2020 ◽

pp. 28-47

Author(s):

Vladimir A. Drozd ◽

Valery V. Temchenko ◽

Yuri V. Chubov ◽

Vladimir N. Kustov ◽

Kirill S. Golokhvast

Keyword(s):

Built Environment ◽

Gamma Radiation ◽

Background Radiation ◽

Residential Buildings ◽

Living Environment ◽

Research Project ◽

Apartment Buildings ◽

Measurement Results ◽

Background Gamma Radiation

Introduction. The article addresses background gamma radiation in residential premises of apartment buildings in Vladivostok. This study is based on earlier research undertakings focused on the sick building syndrome (SBS), which proves its high relevance. The research is focused on the intensity of background gamma radiation in the residential premises of apartment buildings in Vladivostok. New data obtained in the course of the field experiments, the scale of their analysis, the coverage of substantive issues concerning radiation intensity and its monitoring in residential buildings guarantee the novelty of this research project. These findings also have a practical value that deals with environmental safety. Materials and methods. Onsite examinations were conducted in the form of background gamma radiation measurements taken in versatile apartment buildings, built at different times and made of different materials. Results. This section contains analytical information about the lack of influence of the location of apartment buildings on background radiation inside the apartments examined within the framework of this research project. Measurement results represent a range of values depending on construction materials used. Principal regularities, derived from the measurement results, are based on the time of operation of residential buildings, which is of practical importance. Conclusions. Patterns of influence of building parameters on background radiation inside apartments allow to assess the condition of residential buildings. Background radiation information can be entered into BIM databases and used to formulate the approach to the design of buildings and urban infrastructure so that they were focused on their residents and users. Background radiation research findings, entered into the database and contributed to design algorithms which are customized to the needs of urban residents, will enable designers to project the overall quality of the living environment encompassing the built environment analyzed in this article and other nearby buildings and structures located in Vladivostok.

Download Full-text

CAR-BORNE SURVEY OF NATURAL BACKGROUND GAMMA RADIATION IN WESTERN, EASTERN AND SOUTHERN THAILAND

Radiation Protection Dosimetry ◽

10.1093/rpd/ncz272 ◽

2019 ◽

Vol 188 (2) ◽

pp. 174-180

Author(s):

Chutima Kranrod ◽

Supitcha Chanyotha ◽

Phongphaegh Pengvanich ◽

Rawiwan Kritsananuwat ◽

Thamaborn Ploykrathok ◽

...

Keyword(s):

Gamma Radiation ◽

Dose Rate ◽

Pulse Height ◽

Absorbed Dose ◽

Height Distribution ◽

Natural Background ◽

Large Area ◽

Absorbed Dose Rate ◽

Pulse Height Distribution ◽

Background Gamma Radiation

Abstract Natural background gamma radiation was measured along the main roads in the eastern, western and southern regions of Thailand using a car-borne survey system with a 3-in × 3-in NaI (Tl) scintillation spectrometer. The system was able to quickly survey a large area and obtain outdoor absorbed dose rate in air from a gamma ray pulse height distribution. A total of 19 219 data of the outdoor absorbed dose rate in air were collected. The average outdoor absorbed dose rate in air in the eastern, western and southern regions were found to be 8–127, 16–119 and 16–141 nGy h -1 , respectively. The highest outdoor absorbed dose rate in air was detected in the southern region of Thailand. The corresponding average outdoor annual effective dose to the public ranged from 11.7 to 80.8 μSv.

Download Full-text