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International Journal of Radiation Research، جلد ۵، شماره ۳، صفحات ۱۴۳-۱۴۶
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عنوان انگلیسی Production of an economic high-density concrete for shielding megavoltage radiotherapy rooms and nuclear reactors
چکیده انگلیسی مقاله Background: In megavoltage radiotherapy rooms, ordinary concrete is usually used due to its low construction costs, although higher density concrete are sometimes used, as well. The use of high-density concrete decreases the required thickness of the concrete barrier hence, its disadvantage is its high cost. In a nuclear reactor, neutron radiation is the most difficult to shield. A method for production of economic high-density concrete with appropriate engineering properties would be very useful. Materials and Methods: Galena (PbS) mineral was used to produce of a high-density concrete. Galena can be found in many parts of Iran. Two types of concrete mixes were produced. The water-to-concrete (w/c) ratios of the reference and galena concrete mixes were 0.53 and 0.25, respectively. To measure the gamma radiation attenuation of Galena concrete samples, they were exposed to a narrow beam of gamma rays emitted from a cobalt-60 therapy unit. Results: The Galena mineral used in this study had a density of 7400 kg/m3. The concrete samples had a density of 4800 kg/m3. The measured half value layer thickness of the Galena concrete samples for cobalt- 60 gamma rays was much less than that of ordinary concrete (2.6 cm compared to 6.0 cm). Furthermore, the galena concrete samples had significantly higher compressive strength (500 kg/cm2 compared to 300 kg/cm2). Conclusion: The Galena concrete samples made in our laboratories had showed good shielding/engineering properties in comparison with all samples made by using high-density materials other than depleted uranium. Based on the preliminary results, Galena concrete is maybe a suitable option where high-density concrete is required in megavoltage radiotherapy rooms as well as nuclear reactors.
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نویسندگان مقاله سید محمد جواد مرتضوی | s m j mortazavi
department of radiology, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)

محمدعلی مصلح شیرازی | m a mosleh shirazi
radiotherapy physics unit, radiotherapy department, namazee hospital, shiraz university of medical sciences, shiraz, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)

محمدرضا ماهری | m r maheri
civil engineering department, school of engineering, shiraz university, shiraz, iran

سازمان اصلی تایید شده: دانشگاه شیراز (Shiraz university)

h یوسف نیا | h. yousefnia
department of nuclear engineering, school of engineering, shiraz university of medical sciences, shiraz, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)

s ذوالقدری | s. zolghadri
department of nuclear engineering, school of engineering, shiraz university of medical sciences, shiraz, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)

a حاجی پور | a haji pour
civil engineering department, school of engineering, shiraz university, shiraz, iran

سازمان اصلی تایید شده: دانشگاه شیراز (Shiraz university)

نشانی اینترنتی http://www.ijrr.com/browse.php?a_code=A-10-1-249&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Radiation Biology
نوع مقاله منتشر شده تحقیق بدیع
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