Air and water concentrations of radon in Alice Springs and Santa Teresa houses, 1984
Alcock, J. F.; Johnston, G.; Northern Territory. Department of Mines and Energy. Water Resources Division
E-Publications; PublicationNT; E-Books; Technical Report ; No. 11/1985
Made available via the Publications (Legal Deposit) Act 2004 (NT).
This report details results of integrated radon measurements taken in and around five houses at Alice Springs. Radon concentrations were measured in reticulated water supplies, household rooms and outdoor air. The reticulated water supply and bathroom air of two houses in Santa Teresa were also measured. The possible significance of the water supply as a source of indoor atmospheric radon is discussed. Recommendations for further reticulated water supplies discussed. sampling and implications for in the Northern Territory are discussed.
prepared by J. Alcock & G. Johnston
1. Introduction -- 2. Sampling programme -- 3. Analysis and results -- 4. Health -- 5. Conclusions and recommendations -- 6. Acknowledgements -- 7. References.
Water quality -- Northern Territory -- Alice Springs Region; Air quality -- Northern Territory -- Alice Springs Region; Radon measures
Department of Mines and Energy. Water Resources Division.
Alice Springs (N.T.)
Technical Report ; No. 11/1985
38 pages : illustrations and maps ; 30 cm.
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http://www.ntlis.nt.gov.au/hpa-services/techreport?report_id=WRA85011; Also available online in pdf format from NRETA maps http://www.ntlis.nt.gov.au/hpa-services/techreport?report_id=WRA85011; http://www.ntlis.nt.gov.au/hpa-services/techreport?report_id=WRA85011 [Also available online in pdf format from NRETA maps]
Technical Report WRA85011 Viewed at 03:02:19 on 18/02/2010 Page 22 of 38. I I I I I I I I I I I I I I I I I I I I Temperature is importa~t in assessing indoor radon concentrations because ambient temperatures determine the ventilation rates of houses. The vntilation rate determines the age o the air within a house and thus the ratio of radon to its decay products or "daughters". Table 3 (iii) lists the average radon-222 concentrations for all houses at each locatio~~ in Alice Springs. Table 3 (iii) AVERAGE RADON CONCENTRATIONS MEASURED IN AIR AND WATER FOR ALICE SPRINGS (Bq/L) Water 12 Bathroom 0.02 Kitchen 0.02 Laundry 0.03 Living Room 0.02 Bedroom 0.02 Outd.oors 0.02 If it is accepted that the period of measurement in 1984 represented an average in terms of temperature fluctuations and that the period adequately reflects the change in air turnover within houses between summer and winterr then water is not a significant source of radon to indoor air in Alice Sprinqs. Indoor radon concentrations being indistinguishable from background radon concentrations. The background radon concentrations are very high 7 4nd presumably reflect the high uranium content of soils and rocks in the area. Diurnal atmospheric temperature effects and the qeography of the Alice Springs townships may be contributing to the high backgrounds observed. For comparison, table 3(iv) lists some mean radon-222 atmosheric background concentrations measured from various areas around the world (Reference 3). 1 3
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