Theoretical evaluation of dose distribution in product in radiation processing plants |
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| Institution: | 1. Board of Radiation & Isotope Technology, Department of Atomic Energy, BARC Vashi Complex, Sector-20, Vashi, Navi Mumbai 400705, India;2. Ex-Internal Dosimetry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, Edificio 18, I-90128 Palermo, Italy;2. Istituto Nazionale di Fisica Nucleare (INFN), Via Santa Sofia, 64, I-95123 Catania, Italy;3. ATEN Center, University of Palermo Viale delle Scienze, Edificio 18, I-90128 Palermo, Italy;4. School of Engineering, University of Pisa, Largo Lazzarino 1, I-56126 Pisa, Italy;5. School of Medicine, Yale University, 333 Cedar St, New Haven CT 06520, United States;6. Department of Physics, University of Milano, Via Giovanni Celoria, 16, I-20133 Milano, Italy;7. Health Physics Unit, University-Hospital of Pisa, I-56126 Pisa, Italy;1. Department of Physics, Faculty of Science, University of Qom, Ghadir Blvd, Qom, Iran;2. Faculty of Physics, Shahrood University of Technology, Shahrood, Iran;1. Faculty of Natural Science and Mathematics, University of Pri?tina, Lole Ribara 29, 38220 Kosovska Mitrovica, Serbia;2. Tigar, Nikole Pa?i?a 213, 18300 Pirot, Serbia;3. Institute of Nuclear Science Vin?a, University of Belgrade, Mike Petrovi?a Alasa 12-14, 11000 Belgrade, Serbia;1. School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China;2. Sichuan Key Laboratory of Applied Nuclear Techniques in Geosciences, Chengdu University of Technology, Chengdu 610059, China;3. Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, China;1. National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi, Toki, Gifu, 509-5202, Japan;2. SOKENDAI(The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu, 509-5292, Japan;3. Nagoya University, Furo, Chikusa, Aichi, 464-0814, Japan |
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| Abstract: | An analytical method has been developed for the computation of dose rates at any number of points in the product material in a radiation processing plant in which radioactive source pencils are arranged in a rectangular vertical frame. Exposures from each individual source pencil and the movement of the product box was taken into consideration for the evaluation of absorbed dose. The validity of the computational method was tested for one of the existing irradiator already in operation. Excellent agreement was achieved between the computation and measured values of doses received by the product material. The method was then applied in the design of a new irradiator and was found very useful to arrive at optimum source size and target size. Hence, this method is being adopted for the design of all forthcoming 60Co irradiation plants in India. |
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