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Yasue, Ayumu*; Kawakami, Mayu*; Kobayashi, Kensuke*; Kim, J.; Miyazu, Yuji*; Nishio, Yuhei*; Mukai, Tomohisa*; Morooka, Satoshi; Kanematsu, Manabu*
Quantum Beam Science (Internet), 7(2), p.15_1 - 15_14, 2023/05
Kobayashi, Kensuke*; Yasue, Ayumu*; Morooka, Satoshi; Kanematsu, Manabu*
Konkurito Kogaku Nenji Rombunshu (DVD-ROM), 44(1), p.208 - 213, 2022/07
no abstracts in English
Kobayashi, Kensuke*; Suzuki, Hiroshi; Nishio, Yuhei*; Kanematsu, Manabu*
Nihon Kenchiku Gakkai Kozokei Rombunshu, 86(785), p.1026 - 1035, 2021/07
no abstracts in English
Tojo, Masayuki*; Kanazawa, Toru*; Nakashima, Kazuo*; Iwamoto, Tatsuya*; Kobayashi, Kensuke*; Goto, Daisuke*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
Proceedings of 27th International Conference on Nuclear Engineering (ICONE-27) (Internet), 13 Pages, 2019/05
In this study, fuel loading effects in BWR spent fuel rack accidents are widely investigated using three-dimensional analysis methods from both nuclear and thermal hydraulics viewpoints, including: (a) Decay heat of spent fuel after discharge, (b) The maximum temperature of spent fuel cladding in the spent fuel rack depending on heat transfer phenomena, and (c) Criticality of the spent fuel rack after collapsing of the fuel due to a severe accidents in the BWR spent fuel pool (SFP).
Kobayashi, Kensuke*; Goto, Daisuke*; Tojo, Masayuki*; Ikehara, Tadashi*; Kaji, Yoshiyuki; Nemoto, Yoshiyuki
no journal, ,
We evaluate fuel temperature based on the steady state heat transfer analysis with considering accurate fuel history and storage conditions.
Goto, Daisuke*; Tojo, Masayuki*; Kobayashi, Kensuke*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
no journal, ,
Steady-state heat transfer analysis method for the BWR spent fuel rack system was adopted to evaluate the cladding temperature in spent fuel pool accident condition. The cladding temperature seems to depend on spent fuel distribution, and the evaluation results were compared with the results obtained by using the MAAP. Ideas for the deployment of the fuels to prevent temperature elevation during the spent fuel pool water level decrease will be discussed.
Kobayashi, Kensuke*; Tojo, Masayuki*; Goto, Daisuke*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
no journal, ,
It is suggested that effective multiplication factor would increase if there is a water level difference between in and out of channel box of BWR fuel. Monte Carlo criticality analysis was conducted in consideration of the water density and the water level in and out of the channel box which were indicated in the evaluation using void fraction correlation obtained in previous works simulating several irradiation conditions of BWR fuels.
Tojo, Masayuki*; Kanazawa, Toru*; Kobayashi, Kensuke*; Goto, Daisuke*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
no journal, ,
Computational fluid dynamics (CFD) analysis for the loss of coolant accident in spent fuel pool (SFP) with Zircalloy-2 cladding was conducted. In the higher region of spent fuel rack internal, oxygen content in the atmosphere was decreased because of oxigen consumption during the oxidation reaction of cladding material. This oxygen depression is thought to surpress the oxidation of claddings.
Goto, Daisuke*; Kobayashi, Kensuke*; Tojo, Masayuki*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
no journal, ,
Influence of base temperature of the spent fuel pool (SFP), rack dimension, structure, and decay heat distribution, for the maximum temperature of cladding in spent fuel rack during the SFP loss of coolant accident was evaluated in this study, by using the previously developed 3 dimensional steady-state heat transfer analysis method.
Kobayashi, Kensuke*; Goto, Daisuke*; Tojo, Masayuki*; Nemoto, Yoshiyuki; Kaji, Yoshiyuki
no journal, ,
Experiment and analysis simulating the water level mismatch between inside and outside of chanel box of BWR fuel under loss of cooling system were conducted for validation of the equation for void fraction correlation.
Kobayashi, Kensuke*; Ooka, Tokunao*; Kanematsu, Manabu*; Suzuki, Hiroshi; Tateyama, Soichi*; Nagai, Tomoya*; Nishio, Yuhei*; Hirata, Yoshikazu*; Yoshioka, Masahiro*
no journal, ,
no abstracts in English
