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j.pnucene.2021.103840.pdf1.24 MBAdobe 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  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6709-0432 (unconfirmed)
Shen, Xiuzhong  kyouindb  KAKEN_id  orcid 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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