Natural radioactivity distribution and gamma radiation exposure of beach sands from Sithonia Peninsula

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Argyrios Papadopoulos ◽  
Georgios Christofides ◽  
Antonios Koroneos ◽  
Stylianos Stoulos
Keyword(s):  
Gamma Radiation ◽  
Effective Dose ◽  
Natural Radioactivity ◽  
Annual Effective Dose ◽  
Granitic Rocks ◽  
Rock Types ◽  
Activity Concentrations ◽  
Plutonic Complex ◽  
Parent Rocks ◽  
Beach Sands

AbstractThis study aims to evaluate the activity concentrations of 238U, 226Ra, 232Th, 228Th and 40K along the beaches of Sithonia Peninsula which are adjacent to the rock-types of the Sithonia Plutonic Complex. These range from 6–673, 5–767, 5–1750, 6–1760 and 185–875 Bq/kg respectively. The (% wt.) heavy magnetic (HM) fraction (epidote, allanite, hornblende, biotite and garnet), the heavy non-magnetic (HNM) fraction (monazite, zircon, titanite and apatite) and the total heavy (TH) fraction, were correlated with the concentrations of the measured radionuclides in the bulk samples. The HNM fraction seems to control the activity concentrations of 238U in all samples, while the HM fraction, at least for the heavy mineral rich samples bearing high amounts of epidote crystals with allanite cores, controls their 232Th content. The measured radionuclides in beach sands were normalized to the respective values measured in the granitic rocks, which are their most probable parent rocks, in order to provide data on their enrichment or depletion. The annual effective dose varies from 0.013 to 0.688 mSv y−1 for local people working on the beach, while for tourists the annual external effective dose ranges between 0.003 and 0.165 mSv y−1.

scholarly journals NATURAL RADIOACTIVITY OF GRANITES USED AS BUILDING MATERIALS IN GREECE

2004 ◽  
Vol 36 (1) ◽  
pp. 113 ◽  
Author(s):  
S. Pavlidou ◽  
A. Koroneos ◽  
C. Papastefanou ◽  
G. Christofides ◽  
S. Stoulos ◽  
...  
Keyword(s):  
Effective Dose ◽  
Natural Radioactivity ◽  
Building Materials ◽  
Annual Effective Dose ◽  
Absorbed Dose ◽  
Rock Types ◽  
Foreign Countries ◽  
Radioactive Minerals ◽  
Radiological Impact ◽  
High Level

The granites used in Greece as building materials and imported from foreign countries, mainly from Spain and Brazil, are rock types similar with the stony building materials world-wide used. Sixteen kinds of different granites, considered as the most popular, were sampled and their natural radioactivity was measured by gamma spectrometry. The, 226Ra, 232Th and 40K contents of granites were compared to corresponding ones of other building materials as well as other granite types used all over the world. For the reasons of radiological impact from use of granites as building materials, the absorbed dose and the effective dose as well were determined. Although the annual effective dose is higher than the limit of 1 mSv a"1 for some granites examined, they could be used safely as building materials, considering that their contribution in most of the house constructions is very low. An attempt to correlate the relatively high level of natural radioactivity of different kinds of granites with the presence of radioactive minerals and their chemical composition was also made.

scholarly journals Natural radioactivity distribution and gamma radiation exposure of beach sands close to Kavala pluton, Greece

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Argyrios Papadopoulos ◽  
Antonios Koroneos ◽  
Georgios Christofides ◽  
Stylianos Stoulos
Keyword(s):  
Gamma Radiation ◽  
Radiation Exposure ◽  
Natural Radioactivity ◽  
Activity Concentrations ◽  
Beach Sands ◽  
Radioactivity Distribution

AbstractThis study aims to evaluate the activity concentrations of

MEASUREMENT OF THE ACTIVITY CONCENTRATIONS OF GAMMA EMITTING RADIONUCLIDES IN TOOTHPASTE SAMPLES AND ASSESSMENT OF THE CORRESPONDING ANNUAL EFFECTIVE DOSES

2021 ◽  
Author(s):  
Anas M Ababneh ◽  
Qutad M Samarah
Keyword(s):  
Effective Dose ◽  
Oral Hygiene ◽  
Annual Effective Dose ◽  
Daily Basis ◽  
Dose Assessment ◽  
Accidental Ingestion ◽  
Activity Concentrations ◽  
Effective Doses

Abstract It is inevitable that we are exposed to radiation daily from various sources and products that we consume on daily basis. The use of toothpaste for oral hygiene is one of the most common daily practices by humans and yet very little data are available regarding its radiation content. In this work, we investigated the concentrations of gamma emitting radionuclides in toothpaste samples consumed in Jordan. 40K and 226Ra were detected in almost one-third of the samples, whereas 228Ra was detected in nearly half of them. The corresponding activity concentrations in the detected samples were in the ranges of 68.7–154.2, 4.6–14.1 and 1.3–10.0 Bq/kg, respectively. Dose assessment of accidental ingestion of toothpaste for children and adults was made, and its contribution to the annual effective dose was found to be very minimal with maximum doses of ~2.9 and 1.3 μSv for children and adults, respectively.

Radiological health assessment due to gamma radiation levels of natural radioactivity of soil in vicinity of Nichahoma lignite belt, Kashmir Valley

2016 ◽  
Vol 104 (6) ◽  
Author(s):  
Mudasir Ashraf ◽  
C. Anu Radha ◽  
Shakeel Ahmad ◽  
Sajad Masood ◽  
Rayees Ahmad Dar ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Gamma Radiation ◽  
Natural Radioactivity ◽  
Activity Concentration ◽  
Health Assessment ◽  
Kashmir Valley ◽  
Radioactive Nuclides ◽  
Activity Concentrations ◽  
Measured Dose ◽  
Radiological Health

AbstractThe measurements of activity concentrations in soil of the lignite belt and soil of the villages surrounding the lignite belt have been carried out in order to present the radiological health hazards due to gamma radiation levels of the soil to general public. A low- background Pb-shielded gamma spectroscopic counting assembly utilizing NaI(Tl) detector was employed for the measurements. The activity concentration of radionuclides have been determined and compared with the international and national recommended values. A correlation analysis was also performed in order to predict the contribution of the respective nuclides towards the measured dose rate and to the find the existence of these radioactive nuclides together in the study area.

scholarly journals Assessment of Natural Radioactivity Level and Annual Effective Dose of Amber Rice Samples Cultivated in the South of Iraq

2019 ◽  
Vol 122 ◽  
pp. 05004
Author(s):  
Abdulridha S. Younis ◽  
Nada F. Tawfiq
Keyword(s):  
Effective Dose ◽  
Gamma Ray ◽  
Annual Effective Dose ◽  
Radioactive Material ◽  
Radiological Protection ◽  
Gamma Ray Spectrometer ◽  
Activity Concentrations ◽  
Rice Consumption ◽  
Rice Samples ◽  
South Of Iraq

In this work, the activity concentrations of naturally occurring radioactive material including 238U, 232Th, and 40K were measured of some amber rice samples cultivated in southern Baghdad and Al Najaf governorate and used in Baghdad governorate, Iraq in 2018, using gamma-ray spectrometer with NaI (Tl) detector. The results show that the activity concentrations for 238U ranged from (2.68 to 10.81) Bq/kg with average 5.94 Bq/kg, 232Th ranged from (B.D.L to 3.37) Bq/kg with average 2.65 Bq/kg, and for 40K ranged from (4.48 to 35.7) Bq/kg with average 16.84 Bq/kg. The annual effective dose from rice consumption by adults for 238U, 232Th, and 40K ranged from (0.41 to 1.6) x10-5 Sv/y with average 0.9 x10-5 Sv/y, (B.D.L to 0.42) x10-5 Sv/y with average 0.2 x10-5 Sv/y, and (0.17 to 1.2) x10-5 Sv/y with average 0.45 x10-5 Sv/y respectively. All values of the average specific activities are less than the global average values of ICRP, and the annual effective dose from rice consumption by adults was lower than the permissible limit of (1 m Sv/y) recommended by the International Commission on Radiological Protection.

ASSESSMENT OF INDOOR RADIATION DOSE RECEIVED BY THE RESIDENTS OF NATURAL HIGH BACKGROUND RADIATION AREAS OF COASTAL VILLAGES OF KANYAKUMARI DISTRICT, TAMIL NADU, INDIA

2015 ◽  
Vol 1 (01) ◽  
pp. 01-05
Author(s):  
R.Ragel Mabel Saroja
Keyword(s):  
Solid State ◽  
Radiation Dose ◽  
Gamma Radiation ◽  
Radiation Exposure ◽  
Effective Dose ◽  
Tamil Nadu ◽  
Background Radiation ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
High Background

Radiation exposure and effective dose received through two routes of exposure, viz. external and internal, via inhalation, by residents of coastal villages belonging to Natural High Background Radiation Areas (NHBRA) of Kanyakumari District and Tamil Nadu inIndiawere studied. While the indoor gamma radiation levels were monitored using Thermo Luminescent Dosimeters (TLDs), the indoor radon and thoron gas concentrations were measured using twin chamber dosimeters employing Solid State Nuclear Track Detectors (SSNTDs, LR-115-II). The average total annual effective dose was estimated and found to be varied from 2.37 to8.64 mSv.

scholarly journals Determination of radon levels in dwellings and social objects and evaluation annual effective dose from inhalation of radon in Stepnogorsk area Northern Kazakhstan

2020 ◽  
Vol 4 (4) ◽  
pp. 343-349
Author(s):  
D.S. Ibrayeva ◽  
M.N. Aumalikova ◽  
K.B. Ilbekova ◽  
M.M. Bakhtin ◽  
P.K. Kazymbet
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Noble Gas ◽  
Indoor Radon ◽  
Radioactive Decay ◽  
Annual Dose ◽  
Natural Radiation ◽  
Mining Sites ◽  
Decay Products ◽  
Activity Concentrations

Radon is a noble gas that is one of the natural radioactive decay products of radium resulting from the disintegration of uranium. Humans are exposed to sources of natural radiation activity, being radon and its progeny breathing air responsible for more than 50% of the annual dose received from natural radiation. The aim of this study was to determine the radon concentration in the air in settlements’ dwellings and social objects and calculate the annual effective dose of population from radon on the territory mining activities in Stepnogorsk area. The study has shown that activity concentrations of indoor radon in the buildings ranged from 8 to 870 Bq · m−3 in Aqsu, 3-540 Bq · m−3 in Kvartsitka located close to former gold mining sites. The Einh corresponding to the activity concentrations ranged from 1-27 mSv · y−1 received by the settlements’ public. The highest value of Einh in Aqsu School reaches up to 68 mSv · y−1 received by the critical group of public was found at the territory of former mining the Stepnogorsk area. The results of this study show significant radiation hazards in Aqsu School which located at the territory of former mining site, and there is evidence of radon health risk to the members of the public.

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