ENHANCED RADIOACTIVE CONTENT OF ‘BALANCE’ BRACELETS
| Autor: | S. Tsroya, T. Kravchik, U. German, O. Pelled, A. Abraham |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010504 meteorology & atmospheric sciences
Injury control Accident prevention Silicones Poison control 010501 environmental sciences Radiation Dosage Whole-Body Counting 01 natural sciences Soil Wrist surface Radiation Monitoring Occupational Exposure Background Radiation Humans Soil Pollutants Radioactive Medicine Radiology Nuclear Medicine and imaging Israel 0105 earth and related environmental sciences Whole body counting Radiation Radiological and Ultrasound Technology business.industry Silicone products Thorium Radiochemistry Public Health Environmental and Occupational Health General Medicine Wrist Natural uranium Spectrometry Gamma Radioactivity Gamma Rays Uranium Rubber Nuclear medicine business Dose rate |
| Zdroj: | Radiation Protection Dosimetry. 170:288-291 |
| ISSN: | 1742-3406 0144-8420 |
| Popis: | During a routine whole body counting measurement of a worker at the Nuclear Research Center Negev, abnormal activities of (232)Th and (238)U were measured. After a thorough investigation, it was found that the radioactivity was due to a rubber bracelet ('balance bracelet') worn by the worker during the measurement. The bracelet was counted directly by an high pure germanium gamma spectrometry system, and the specific activities determined were 10.80 ± 1.37 Bq g(-1) for (232)Th and 5.68 ± 0.88 Bq g(-1) for natural uranium. These values are obviously high compared with normally occurring radioactive material (NORM) average values. The dose rate to the wrist surface was estimated to be ∼3.9 µGy h(-1) and ∼34 mGy for a whole year. The dose rate at the centre of the wrist was estimated to be ∼2.4 µGy h(-1) and ∼21 mGy for a whole year. The present findings stresses a more general issue, as synthetic rubber and silicone products are common and widely used, but their radioactivity content is mostly uncontrolled, thus causing unjustified exposure due to enhanced NORM radioactivity levels. |
| Databáze: | OpenAIRE |
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