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Uranium and thorium series radionuclides in drinking water from drilled bedrock wells: correlation to geology and bedrock radioactivity and dose estimation
Linköping University, Department of Medicine and Health Sciences, Radiation Physics . Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medicine and Health Sciences, Radiation Physics . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre of Surgery and Oncology, Department of Radiation Physics.
Linköping University, Department of Medicine and Health Sciences, Radiation Physics . Linköping University, Faculty of Health Sciences.
2002 (English)In: Radiation protection dosimetry, ISSN 0144-8420, Vol. 102, no 3, 249-258 p.Article in journal (Refereed) Published
Abstract [en]

Natural radioactivity in drinking water from 328 drilled wells was studied in correlation to source parameters. Poor correlation to both aquifer geology and bedrock radioactivity was observed. Concentrations of 238U, 226Ra, 228Ra, 222Rn and 210Po in groundwater samples was in the ranges <0.027-5.3, <0.016-4.9, <0.014-1.24, 5-8105 and <0.05-0.947 Bq.l(-1) respectively. In about 80% of the sites the radon concentration exceeds the Nordic recommended exemption level for radon in drinking water and 15% of the sites exceed the action limit. The effective doses from ingestion were calculated and presented in association with geology. Doses due to ingestion ranged between 0.05 and 20.4 mSv.y(-1), where the average contribution from 222Rn amounted to 75%. In comparison, the effective doses from inhalation of indoor 222Rn ranged between 0.2 and 20 mSv.y(-1). The average contribution from inhalation of 222Rn in air to the total effective dose (ingestion+inhalation) was 58 +/- 22%, 73 +/- 18% and 77 +/- 16% (1 SD) for the age categories 1 y, 10 y and adults respectively.

Place, publisher, year, edition, pages
2002. Vol. 102, no 3, 249-258 p.
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:liu:diva-13701OAI: oai:DiVA.org:liu-13701DiVA: diva2:21180
Available from: 2003-12-18 Created: 2003-12-18 Last updated: 2009-08-20
In thesis
1. Radon in natural waters: Analytical Methods; Correlation to Environmental Parameters; Radiation Dose Estimation; and GIS Applications
Open this publication in new window or tab >>Radon in natural waters: Analytical Methods; Correlation to Environmental Parameters; Radiation Dose Estimation; and GIS Applications
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Investigations of radon in natural water and its relation to physical and chemical parameters are outlined in this thesis. In particular, a method for measuring 222Rn in water at low concentrations (~20 mBq.l-1) is described, followed by discussions concerning the design and its application to study both radon and parameters influencing radon levels in natural waters. A topic considered is the impact of fluoride and other aquatic parameters on radon in water. Moreover, variables such as uranium series radionuclides and stable elements in water, bedrock and sediment radioactivity and geology are investigated in two case studies. This was performed by employing radiometric-, chemical-, statistical- and GIS & geostatistical- analyses. The general water chemistry and presence of some elements such as fluoride was observed to influence radon levels in water. Health aspects of radon in drinking water are discussed based on radiation dose assessments. The radiation doses are compared with and added to doses incurred from ingestion of uranium, radium and polonium isotopes in drinking water and inhalation of radon in air in order to estimate total exposures for different age categories. The results may have a potential for future epidemiological studies.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2003. 46 p.
Series
Linköping University Medical Dissertations, ISSN 0345-0082 ; 820
Keyword
Radon analysis, radiation effects, Water chemistry, Water pollution, radioactive analysis
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
urn:nbn:se:liu:diva-5221 (URN)91-7373-510-8 (ISBN)
Public defence
2003-11-07, Elsa Brändströmsalen, Campus US, Linköpings universitet, Linköping, 13:15 (English)
Opponent
Supervisors
Available from: 2003-12-18 Created: 2003-12-18 Last updated: 2012-01-25Bibliographically approved

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Salih, IsamPettersson, HåkanLund, Eva

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