| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] IPEN CNEN SP, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
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| Document type: | Journal article |
| Source: | Radiation Protection Dosimetry; v. 141, n. 2, p. 210-214, 2010. |
| Web of Science Citations: | 3 |
| Abstract | |
Termas de Araxa spa is located in Araxa, State of Minas Gerais. In this region, several minerals rich in uranium and thorium are found. The mineral waters and mud from Termas de Araxa spa have been used for therapeutic and recreation purposes. In this study, the committed effective dose was evaluated for workers and patients at Araxa spa due to (222)RN and (212)Pb inhalation. Radon measurements were carried out through the passive method with solid state nuclear track detectors (Makrofol E) over a period of 21 months, with results varying from 258 +/- 20 to 1634 +/- 111 Bq m(-3). The (212)Pb air concentration was assessed through the modified Kusnetz's method, the results varying from 0.3 +/- 0.1 to 2.1 +/- 0.2 Bq m(-3). Doses received by the spa workers are below 20 mSv.y(-1), suggested by ICRP 60 as an annual effective dose limit for occupational exposure. The radiation doses for the patients are below the mean annual effective dose due to natural sources estimated to be 2.4 mSv.y(-1). (AU) | |