Conceptual Design Study of Beam Window for Accelerator-Driven System
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概要
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The conceptual design study of the beam window of the spallation target is one of the critical issues in the R&D of the accelerator-driven system (ADS). In this study, the investigation to create a feasible concept of the beam window for the ADS was performed by changing the proton beam profile from the Gaussian distribution to the parabolic and the flat distributions. Detailed analyses were performed by considering the particle transport of protons and neutrons in the spallation target region, the thermal hydraulics of lead bismuth eutectic (LBE) around the beam window, and the structural strength of the beam window. The calculation results showed that the difference in the temperature between the inner and outer surfaces at the top of the beam window was reduced by changing the beam profile from the Gaussian to the parabolic and the flat distributions. By this reduction, in the parabolic case, the thermal stress at the top position was also reduced and the buckling pressure increased by about 20%. On the other hand, in the flat case, the thermal stress at the peripheral region instead of at the central position increased and the buckling pressure slightly deteriorated. The buckling mode was also changed in the flat case. From these calculation results and discussions, it was confirmed that all three cases, the Gaussian, the parabolic, and the flat, were feasible and it was concluded that the concept with the parabolic distribution would be the most feasible under the current ADS design condition.
- 社団法人 日本原子力学会の論文
- 2010-10-01
著者
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Sugawara Takanori
Japan Atomic Energy Agency
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Nishihara Kenji
Japan Atomic Energy Agency
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OIGAWA Hiroyuki
Japan Atomic Energy Agency
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KURATA Yuji
Japan Atomic Energy Agency
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Nishihara K
Japan Atomic Energy Agency
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Obayashi Hironari
Japan Atomic Energy Agency
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Kurata Y
Japan Atomic Energy Agency
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