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ファイル | 記述 | サイズ | フォーマット | |
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j.pnucene.2021.103840.pdf | 1.24 MB | Adobe PDF | 見る/開く |
タイトル: | Advances in time-dependent Monte Carlo simulations for void velocity determination using neutron noise techniques |
著者: | Yamamoto, Toshihiro https://orcid.org/0000-0001-6709-0432 (unconfirmed) Shen, Xiuzhong https://orcid.org/0000-0003-2257-0269 (unconfirmed) Sakamoto, Hiroki |
著者名の別形: | 山本, 俊弘 沈, 秀中 |
キーワード: | Void velocity Neutron noise Monte Carlo Simulation |
発行日: | Aug-2021 |
出版者: | Elsevier BV |
誌名: | Progress in Nuclear Energy |
巻: | 138 |
論文番号: | 103840 |
抄録: | Neutron noise measurements for estimating void velocity in a void-containing water flow where spherical bubbles move upward are simulated using a continuous energy Monte Carlo method. The method is newly equipped with a function for handling time-varying locations of void bubbles. In the simulations, time-series data of neutron counts in axially-placed detectors are obtained. The data are subsequently processed to yield the cross-correlation function (CCF), cross-power spectral density (CPSD), and auto power spectral density (APSD). The void velocities are estimated from the maximum CCF, slope of the phase of the CPSD as a function of frequency, and dip frequency of the APSD. These three methods yield a constant void velocity estimation. The simulations demonstrate that the noise techniques are insensitive to a void flow that contains smaller bubbles. |
著作権等: | © 2021. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license. The full-text file will be made open to the public on 1 August 2023 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/267724 |
DOI(出版社版): | 10.1016/j.pnucene.2021.103840 |
出現コレクション: | 学術雑誌掲載論文等 |
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