Estimation of annual effective dose due to radon and thoron concentrations in mud dwellings of Mrima Hill, Kenya.
This study presents radon and thoron concentration measurements and the corresponding effective dose rates in mud dwellings located in the high background radiation area of Mrima Hill, Kenya. Discriminative technique was used for simultaneous measurement of radon and thoron. The effective dose was evaluated based on the concentration of the isotopes and the time spent indoors. Radon concentration ranged from 16 to 56 Bq m(-3) with an average of 35±14 Bq m(-3) and a corresponding annual effective dose of 0.67 mSv y(-1), while that of thoron ranged from 132 to 1295 Bq m(-3) with an average of 652±397 Bq m(-3) and an effective dose of 13.7 mSv y(-1).
Physics Department, Kenyatta University-Mombasa Campus, PO Box 16778, Mombasa, Kenya znimo@yahoo.com.
M W
MW
Chege
Physics Department, Kenyatta University, PO Box 43844, Nairobi, Kenya.
N O
NO
Hashim
Physics Department, Kenyatta University, PO Box 43844, Nairobi, Kenya.
A S
AS
Merenga
Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Radiation Protection, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
O
O
Meisenberg
Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Radiation Protection, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
J
J
Tschiersch
D016902:Air Pollution, Indoor / Q000706:statistics & numerical data*; D000398:Air Pollution, Radioactive / Q000706:statistics & numerical data*; D006798:Housing / Q000706:statistics & numerical data*; D006801:Humans; D007630:Kenya; D011829:Radiation Dosage; D000069079:Radiation Exposure / Q000706:statistics & numerical data*; D011834:Radiation Monitoring / Q000379:methods* / Q000706:statistics & numerical data; D011886:Radon / Q000032:analysis*; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D011886:Radon