Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
Add more filters










Database
Language
Publication year range
1.
Radiat Prot Dosimetry ; 199(18): 2179-2182, 2023 Nov 02.
Article in English | MEDLINE | ID: mdl-37934988

ABSTRACT

Results of the preliminary measurements of indoor radon, thoron and progeny concentrations showed very high values of thoron concentrations in the eastern coastal region of Odisha, India. Therefore, measurements of thoron and its progeny concentrations were extended to a larger number of houses in this area for the assessment of the radiation dose received by the public. The measured values of thoron concentrations were used for the calculation of annual effective doses. The estimated values of the annual effective dose due to thoron exposure were observed in the range of 0.2-14.7 mSv. The estimated radiation doses responsible for thoron exposure were observed considerably high in the region. The results obtained are compared with those obtained in other studies performed so far in the study area and a review of different studies involving different measurement techniques is presented in the paper. The results of this study support the preliminary studies showing high values of thoron levels in the study area.


Subject(s)
Air Pollutants, Radioactive , Air Pollution, Indoor , Radiation Monitoring , Radon , Air Pollutants, Radioactive/analysis , Background Radiation , Air Pollution, Indoor/analysis , Radon Daughters/analysis , Radiation Monitoring/methods , Housing , Radon/analysis , India , Radiation Dosage
2.
Radiat Prot Dosimetry ; 199(18): 2194-2198, 2023 Nov 02.
Article in English | MEDLINE | ID: mdl-37934990

ABSTRACT

A study on the activity concentration of primordial radionuclides 226Ra, 232Th and 40K was carried out on the surface soil samples collected from the coastal villages between Chhatrapur and Gopalpur regions of high background natural radiation area Odisha, India, using high purity germanium gamma spectroscopy. The mean activity concentrations of 226Ra, 232Th and 40K were found to be 231, 1692 and 250 Bq/kg, respectively. The total mean absorbed dose owing to the presence of 226Ra, 232Th and 40K was 1139 nGy/h. The mean annual effective dose was found to be 1397 µSv/y and higher than the UNSCEAR average value 70 µSv/y.


Subject(s)
Radiation Monitoring , Radium , Soil Pollutants, Radioactive , Soil , Thorium/analysis , Radium/analysis , Background Radiation , Radioisotopes , Potassium Radioisotopes/analysis , Soil Pollutants, Radioactive/analysis , Radiation Dosage
4.
J Radiat Res ; 50(4): 355-61, 2009 Jul.
Article in English | MEDLINE | ID: mdl-19506348

ABSTRACT

Based on results of fieldwork in the Balkan Region of Serbia from 2005 to 2007, soil gas radon and thoron concentrations as well as gamma dose rates were measured. Campaigns were conducted in two different geological regions: Niska Banja, considered a high natural radiation area, and Obrenovac around the TentB Thermal Power Plant (TPP), a low natural radiation area. Radon and thoron gas measurements were made by using two types of Japanese passive radon/thoron detectors, which included GPS data and gamma dose rates. The concentrations of soil radon gas in Niska Banja ranged from 1.8 to 161.1 kBq m(-3), whereas the concentrations for soil thoron gas ranged from 0.9 to 23.5 kBq m(-3). The gamma dose rates varied from 70 to 320 nGy h(-1). In the TentB area, radon concentration was found to range from 0.8 to 24.9 kBq m(-3) and thoron from 0.6 to 1.9 kBq m(-3). The gamma dose rate ranged from 90 to 130 nGy h(-1). In addition, the natural radioactivity of the soil was investigated at the low background area. The radium and thorium contents in collected soil samples ranged from 23 to 58 and 33 to 67 Bq kg(-1), respectively. As a result of correlation analyses between the measured values, the highest correlation coefficient (R > 0.95) was found for thorium in the soil and the thoron gas concentration.


Subject(s)
Air Pollutants, Radioactive/analysis , Algorithms , Gases/analysis , Radiation Monitoring/instrumentation , Radiation Monitoring/methods , Radon/analysis , Soil Pollutants, Radioactive/analysis , Equipment Design , Equipment Failure Analysis , Japan , Reproducibility of Results , Sensitivity and Specificity , Serbia
SELECTION OF CITATIONS
SEARCH DETAIL
...