کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5478180 | 1521738 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design and optimization of the new LEU MNSR for neutron radiography using thermal column to upgrade thermal flux
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Design and optimization of the new LEU MNSR for neutron radiography using thermal column to upgrade thermal flux Design and optimization of the new LEU MNSR for neutron radiography using thermal column to upgrade thermal flux](/preview/png/5478180.png)
چکیده انگلیسی
In this article, the preliminary feasibility of using the new miniature neutron source reactor (MNSR) with unique thermal column (TC), as a neutron source for neutron radiography (NR), is investigated. The new reactor core is designed based on the Isfahan MNSR with high density low-enriched uranium (LEU) UO2 fuel instead of high-enriched uranium (HEU) UAl4-Al fuel. The safety of the LEU reactor is studied by the calculation of important neutronics parameters such as core excess reactivity, central control rod worth, shut-down margin (SDM) and effective delayed neutron fraction. The vertical collimator dimensions, the materials to be employed in the collimator, and the collimator position are optimized using MCNP Monte Carlo code. The results showed that presence of the graphite thermal column increases thermal neutrons flux and reduces gamma-ray dose that can satisfy the requirements for neutron radiography. Therefore there is no need for extra gamma filters, fast neutron filters, and neutron moderators at the collimator. We emphasize here that the current designed LEU MNSR can be applied for NR and neutron activation analysis (NAA).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Nuclear Energy - Volume 100, September 2017, Pages 221-232
Journal: Progress in Nuclear Energy - Volume 100, September 2017, Pages 221-232
نویسندگان
J. Mokhtari, F. Faghihi, J. Khorsandi,