Assessment of (226)Ra age-dependent dose from water intake.
The radioactivity in canal and ground waters collected in a 2-year long observation from the vicinity of the Rare Earth Research and Development Center (RRDC), Phathumthani Province, Thailand, was measured in order to determine the concentration of (226)Ra and to estimate the age-dependent effective dose to humans due to consumption. (226)Ra activities in both canal and ground waters were well below the WHO guidance level for drinking water quality of 1 Bq L(-1). The highest (226)Ra effective doses per year were found for infants and teens. However, the observed levels of calculated (226)Ra effective doses for all age groups in both canal and ground waters show satisfactory low values (less than 15 microSv yr(-1)). These values are acceptable in accordance with the WHO recommended reference dose level of 100 microSv yr(-1) from water intake of 2 Lday(-1).
Research and Development Group, Thailand Institute of Nuclear Technology, Vibhavadi Rangsit Road, Bangkok 10900, Thailand. boonsom@oaep.go.th
Boonsom
B
Porntepkasemsan
Kanitha
K
Srisuksawad
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001822:Body Burden; D002648:Child; D002675:Child, Preschool; D003198:Computer Simulation; D004435:Eating; D004781:Environmental Exposure / Q000032:analysis*; D005260:Female; D005507:Food Contamination, Radioactive / Q000032:analysis*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D011883:Radium / Q000032:analysis*; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D013785:Thailand; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D014875:Water Pollutants, Radioactive; D011883:Radium