Evaluation of Radon Radioactivity and Radiological Impact by Using Solid-State Nuclear Track Detector for Erediya younger granites of Central Eastern Desert in Egypt

Abstract

The current study is carried out to monitor radioactivity levels in Erediya younger granites of the Central Eastern Desert in Egypt by using a solid-state nuclear track detector (CR-39 NTD). The polymeric CR-39 NTD was used to determine radium-226 and radon-222 activity concentration, and the theoretical conversion equations, were employed to assess the radiological impact. Predetermined 33 samples were collected from different locations within and around Egypt's Eradia area fulfilling the IAEA TECDOC-1415 protocols. The measured overall average value of the radium and radon activity concentration are 7467.44±50.68 and 7840.14±53.2 Bqm -3 , respectively, which indicated a high abundance of TENORM in the collected samples of the investigated area. The exhalation rate and annual effective dose were calculated, indicating high grades than the permissible limit recommended by IAEA and UNSCEAR, and the average values are 0.87±0.01 Bqm -2 h -1 and 1637.82±26.87 mSvy -1 respectively. The present result is a reference for the radioactivity background as well as assesses any harmful radiation, and particularly helps in applying radiation protection principles for the occupational worker in the Erediya area. To furnish the outcome of the study, data was plotted as counter maps for tracking the distribution pattern of radioactivity levels and concerning radiation protection and human safety work level index was calculated to apply perfect radiation protection methodologies for the occupational.

Correlation Influence and Quantification of Grain Size on Radon Radioactivity for (Ca2SiO4) Ore Rocks

“…Alpha track counting for each sample was performed by using an optical microscope with a magnification of 640x taking into consideration the background [10,11,13,29].…”

“…For the actual summation of alpha tracks, the radiation background was counted and eliminated from the total count of investigated samples [30][31][32]. Equation (1) gives the radon activity concentration Rn C in Bqm -3 at secular equilibrium [10,11,13,29,[33][34][35][36]:…”

“…There are numerous types of SSNTDs have been enabled to measure radon radioactivity concentration. The cultivated NTD has a distinctive resolution of charged particles [1,[10][11][12][13]. Numerous literature studies accomplished to explore the encompasses of some physical and chemical factors, for example, bulk etching and optical properties of the NTDs [8,[14][15][16].…”

Radionuclides Determination and Computing Radiobiological Dose for TENORM Exposure Using NaI(Tl) Gamma-ray Spectrometer

“…Special attention to radionuclides production from ( 232 Th, 238 U, and 235 U) decay series is given to radon, which is considered the main source of natural internal contamination to which occupational and public occupants are exposed [1][2][3][4][5][6][7]. The biological effects of the weighting factor denoted; by tissue/organ weighting factors (WT) have been established, which compare the relative biological effects of various types of radiation and the susceptibility of different organs [8][9][10][11]. The Environmental Protection Agency (EPA) gives an account of work sponsored by an agency of the United States Government which relies on large-scale data for modeling calculation of equivalent doses based on the radioactivity measurements [12].…”

“…The weighting parameters used in federal guidance report No. (11), which were those advised in radiation protection guidelines to federal agencies for occupational exposure have been utilized to calculate the major doses quantity, or effective doses equivalent [12]. The current work is carried out to assess the radioactivity of natural radionuclides using NaI(Tl) gamma-ray spectrometer [13][14][15][16][17].…”