scholarly journals Assessment of occupational exposure from radon in the newly formed underground tourist route under Książ castle, Poland

2021 ◽  
Author(s):  
Lidia Fijałkowska-Lichwa ◽  
Tadeusz A. Przylibski
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Natural Ventilation ◽  
Reference Level ◽  
Construction Work ◽  
Radon Exposure ◽  
Council Directive ◽  
The Mean ◽  
Effective Dose Rate ◽  
Radon Concentrations

AbstractIn the present study, 222Rn activity concentrations in a newly formed underground tourist route under Książ castle, Poland, were investigated for periods undisturbed and disturbed by construction works. This preliminary assessment is based on the almost 3-year long continuous measurements (28 Oct. 2016–02 Jul. 2019) done with an SRDN-3 instrument. In detail described are radon concentrations for periods of renovation (11 Aug. 2018–10 Oct. 2018), opening (15 Oct. 2018–10 Apr. 2019) and operation and monitoring (11 Apr. 2019–02 Jul. 2019) of the facility. It was observed that after the termination of construction work, when natural ventilation returned to the state preceding this work, the absolute values of radon activity concentration decreased. The mean annual radon concentrations were higher than the reference level of radon concentration in underground spaces recommended by IAEA, ICRP, and by the EU Council Directive for workplaces. They reached 1179 Bq/m3 and 943 Bq/m3 in 2017 and 2018, respectively. Cyclically recurring daily changes in radon concentrations occurred only in April and October (so-called transitional periods) and only outside the period of construction work. The results confirmed; however, that these changes need not be considered when planning the work in the tunnel. The minimum effective dose rate from radon exposure occurs in colder periods of the year, from November to the end of March, where the mean effective dose rate value was found to be 0.0003 mSv/h. In contrast, the maximum dose rate of 0.014 mSv/h was observed from April to August.

Measuring the Pollution Level with Uranium and Radon in the Soil of Some Areas Inside Baghdad University Campus-AL-Jadiriyah

2021 ◽  
Vol 19 (7) ◽  
pp. 72-77
Author(s):  
Farah Faris Kaddoori ◽  
Basim Khalaf Rejah ◽  
Wijdan Thamer Fzaa
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Track Detector ◽  
Soil Samples ◽  
Pollution Level ◽  
University Campus ◽  
Nuclear Track Detector ◽  
Average Value ◽  
Effective Dose Rate ◽  
Radon Concentrations

In present study, the technique was used, including nuclear track detector type (CR-39), for appreciative concentrations uranium and radon in soil samples from Baghdad University Campus-AL-Jadiriyah utilizing a prolonged -term with a solid-state nuclear path sensor, a technique for charged particles has been developed., the radon concentrations, effective dose rate and uranium concentrations have measured in soil samples. Eight various venues from soil Baghdad University Campus have appointed. The results indicated variant values about uranium and radon concentrations, the average value for radon gas, effective dose rate and uranium concentrations was found to be 281.59 Bq/cm3, 7.09 mSv/y and 0.01 Bq/mm-2 respectively. All results appeared that concentrations for radon and uranium in soil are infra the permitted limit from (ICRP) agency which are 1100 Bq/m3 and 11.7 (mg. Kg- 1) ppm respectively. All results were comparison with the domestic and worldwide results.

Indoor Radon and Thoron Concentration and the Associated Effective Dose Rate Determination in Dwellings of Suq Alshouk, Thiqar (Iraq)

2021 ◽  
Vol 19 (12) ◽  
pp. 06-10
Author(s):  
Hussam Najem Abood ◽  
Ahmed Abbas Mohamed
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Type Ii ◽  
Average Value ◽  
Effective Dose Rate

Indoor radon/thoron concentration has been determined in some dwellings of Suq Alshouk district in Thiqar Governorate southern of Iraq, using LR-115 type II and CR-39 (SSNTDs). In this work the indoor radon/thoron concentration varies from (8-73) Bq m-3 for radon with an average 35±2Bq m-3, and ranges (1- 47) Bq m-3 for thoron with an average16±2Bq m-3. The average annual effective dose due to radon and thoron varies from 0.43-3.38m Sv y-1 with average value 1.43±0.11 mSv y-1.

Assessment of radioactivity from selected soil samples from Halfa Aljadida area, Sudan

2019 ◽  
Vol 107 (6) ◽  
pp. 489-502
Author(s):  
Abd-Elmoniem A. Elzain ◽  
Hajo Idriss ◽  
Yousif Sh. Mohammed ◽  
Khidir Shaib Mohamed ◽  
Mohamed Abd Elwahab Mohamed Ali ◽  
...  
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Linear Correlation ◽  
Radon Concentration ◽  
Soil Samples ◽  
Average Value ◽  
Soil Gas Radon ◽  
Effective Dose Rate ◽  
Alpha Index ◽  
Concentration Surface

Abstract In this research, the results of radon concentration, surface and mass exhalation rates, radium concentration, effective dose rate and the alpha index have been investigated in a number of 198 soil samples that have been collected from various residential locations of Halfa Aljadida area, Sudan. The can technique, containing CR-39 have been used. From our results, the average value of soil gas radon concentration was found to be 1.96±0.22 kBq·m−3. The average values of surface and mass exhalation rates were 1.73±0.19 Bq·m−2·h−1 and 34.79±3.87 mBq·kg−1·h−1, respectively. The radium concentration average value was 8.06±0.90 Bq·kg−1. While the average value of the effective dose rate was recorded to be 54.69±6.11 mSv·y−1. The average value of alpha index of studied samples was (4.03±0.45)×10−2. From the study, a good positive and linear correlation between radium concentration, surface and mass exhalation rates of soil samples were present. In addition to that, a positive and linear correlation between radium and radon concentrations was found. Finally, a comparison between the results and other findings was conducted and the results imply the fact that the area under consideration is safe as if the health hazard are mentioned.

scholarly journals Upgrade of GLE database: Assessment of effective dose rate at flight altitude

2018 ◽  
Vol 62 (2) ◽  
pp. 398-407 ◽  
Author(s):  
S. Tuohino ◽  
A. Ibragimov ◽  
I. Usoskin ◽  
A. Mishev
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Flight Altitude ◽  
Effective Dose Rate

scholarly journals Technical and radiological characterisation of fly ash and bottom ash from thermal power plant

2021 ◽  
Author(s):  
Emilija Fidanchevski ◽  
Biljana Angjusheva ◽  
Vojo Jovanov ◽  
Pece Murtanovski ◽  
Ljubica Vladiceska ◽  
...  
Keyword(s):  
Fly Ash ◽  
Effective Dose ◽  
Dose Rate ◽  
Power Plants ◽  
Annual Effective Dose ◽  
Health Effect ◽  
Thermal Power ◽  
Bottom Ash ◽  
Effective Dose Rate ◽  
Annual Effective Dose Rate

AbstractHuge quantities of fly ash and bottom ash are generated from thermal power plants and it presents great concern for country, mainly due to the environmental effects. In this study, fly ashes and bottom ash were characterized from technical and radiological aspects. Health effect due to the activity of radionuclides 226Ra, 232Th and 40K was estimated via radium equivalent activity (Raeq), external hazards index (Hex), the external absorbed dose rate (D) and annual effective dose rate (EDR). The specific surface area (40.25 m2 g−1), particle density (1.88 g cm−3) and LOI (23.49%) were typical for bottom ash. Siliceous fly ash contained 32% reactive silica. The annual effective dose rate for all ashes is ≤ 0.2 mSv y−1. Both, fly ash and bottom ash present potential secondary raw materials to be used for building purposes as result of their technological and radiological assessment.

scholarly journals Neutron monitor count rate increase as a proxy for dose rate assessment at aviation altitudes during GLEs

2018 ◽  
Vol 8 ◽  
pp. A46 ◽  
Author(s):  
Alexander Mishev ◽  
Sasu Tuohino ◽  
Ilya Usoskin
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Count Rate ◽  
Rate Increase ◽  
Ground Level ◽  
Flight Altitude ◽  
Ground Level Enhancement ◽  
Solar Particle Events ◽  
Effective Dose Rate ◽  
Ground Level Enhancement Events

Radiation exposure due to cosmic rays, specifically at cruising aviation altitudes, is an important topic in the field of space weather. While the effect of galactic cosmic rays can be easily assessed on the basis of recent models, estimate of the dose rate during strong solar particle events is rather complicated and time consuming. Here we compute the maximum effective dose rates at a typical commercial flight altitude of 35 kft (≈11 000 m above sea level) during ground level enhancement events, where the necessary information, namely derived energy/rigidity spectra of solar energetic particles, is available. The computations are carried out using different reconstructions of the solar proton spectra, available in bibliographic sources, leading to multiple results for some events. The computations were performed employing a recent model for effective dose and/or ambient dose equivalent due to cosmic ray particles. A conservative approach for the computation was assumed. A highly significant correlation between the maximum effective dose rate and peak NM count rate increase during ground level enhancement events is derived. Hence, we propose to use the peak NM count rate increase as a proxy in order to assess the peak effective dose rate at flight altitude during strong solar particle events using the real time records of the worldwide global neutron monitor network.

Radon level and radon effective dose rate determination in Moroccan dwellings using SSNTDs

2005 ◽  
Vol 40 (1) ◽  
pp. 118-123 ◽  
Author(s):  
L. Oufni ◽  
M.A. Misdaq ◽  
M. Amrane
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Radon Level ◽  
Effective Dose Rate

Using geogenic radon potential to assess designation of radon priority areas in Ireland

2020 ◽  
Author(s):  
Meabh Hughes ◽  
Quentin Crowley
Keyword(s):  
Lung Cancer ◽  
Indoor Radon ◽  
Reference Level ◽  
Indoor Radon Concentration ◽  
Soil Radon ◽  
Council Directive ◽  
Geological Information ◽  
S 100 ◽  
Radon Potential ◽  
Radon Concentrations

<p>Radon is a radioactive gas which emanates from rock, soil and water. Radon concentrations in the<br>atmosphere are generally very low (typically <5 Bq m-3), however it can occur at much higher levels<br>in soil (typically 10’s-100’s kBq m-3), or enclosed spaces such as buildings and caves (typically 10’s-<br>100’s Bq m-3). Exposure to radon and its daughter products is associated with an elevated risk of<br>developing lung cancer. Ireland has a population weighted indoor radon concentration of 98 Bq m-3<br>resulting in an estimated 300 annual lung cancer cases per year, representing approximately 12% of<br>the annual lung cancer cases. A national-scale legislative radon-risk map has a 10 x 10 km spatial<br>resolution and is based exclusively on indoor radon measurements (i.e. it does not contain any<br>geological information). The legislative map satisfies the European Council Directive<br>2013/59/EURATOM Basic Safety Standard, in that it defines “high radon” areas as those where >10%<br>of homes are estimated to exceed the national reference level of 200 Bq m-3. New buildings in such<br>areas are legally required to have a barrier, with low radon permeability installed.</p><p>This research focuses on a karstic region of SE Ireland, which features some exceptionally high<br>indoor radon concentrations (65,000 Bq m-3), even though it is not classified as a “high radon” area<br>on the national legislative map. Here we demonstrate the use of measuring sub-soil radon<br>concentrations and sub-soil permeability, in order to construct a radon potential (RP) map of the<br>area. Extremely high sub-soil radon concentrations (>1443 kBqm-3) and radon potential values<br>(>200) are spatially associated with Namurian shales, interbedded with limestone. Overall, we<br>classify the study area as high radon potential (RP >35) using this technique. We suggest all areas<br>underlain by Namurian shales in Ireland should undergo similar radon potential mapping, and if<br>necessary, should be re-designated as “high radon” areas. If deemed appropriate (i.e. where RP<br>>35), such a designation will help to protect the general public from the harmful effects of indoor<br>radon exposure, and will help to lower the incidence of radon-related lung cancer in these areas.</p>

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