Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor
In a fast reactor, we evaluated a new core concept that prevents severe recriticality after whole-scale molten formation in a severe accident. A core concept in which Duplex pellets including neutron absorber are loaded in the outer core has been proposed. Analysis by the continuous energy model Mon...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2019/2753789 |
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| _version_ | 1832562659993583616 |
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| author | Toshio Wakabayashi Makoto Takahashi Naoyuki Takaki Yoshiaki Tachi Mari Yano |
| author_facet | Toshio Wakabayashi Makoto Takahashi Naoyuki Takaki Yoshiaki Tachi Mari Yano |
| author_sort | Toshio Wakabayashi |
| collection | DOAJ |
| description | In a fast reactor, we evaluated a new core concept that prevents severe recriticality after whole-scale molten formation in a severe accident. A core concept in which Duplex pellets including neutron absorber are loaded in the outer core has been proposed. Analysis by the continuous energy model Monte Carlo code MVP using the JENDL-4.0 nuclear data library revealed that this fast reactor core has large negative reactivity due to fuel melting at the time of a severe accident, so that the core prevents recriticality. Regarding the core nuclear and thermal characteristics, the loading of Duplex pellets including neutron absorber in the outer core caused no significant differences from the normal core without Duplex pellets. |
| format | Article |
| id | doaj-art-270e2e09b6bc42bbaca3107e47e30b5b |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-270e2e09b6bc42bbaca3107e47e30b5b2025-02-03T01:22:00ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832019-01-01201910.1155/2019/27537892753789Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast ReactorToshio Wakabayashi0Makoto Takahashi1Naoyuki Takaki2Yoshiaki Tachi3Mari Yano4Tohoku University, Graduate School of Engineering, 6–6–11 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980–8579, JapanTohoku University, Graduate School of Engineering, 6–6–11 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980–8579, JapanDepartment of Nuclear Safety Engineering, Tokyo City University, 1–28–1 Tamazutsumi, Setagaya-ku, Tokyo 158–8557, JapanOarai Research and Development Center, Japan Atomic Energy Agency, 4002 Narita-cho, Oaraimachi, Ibaraki 311–1393, JapanDepartment of Nuclear Safety Engineering, Tokyo City University, 1–28–1 Tamazutsumi, Setagaya-ku, Tokyo 158–8557, JapanIn a fast reactor, we evaluated a new core concept that prevents severe recriticality after whole-scale molten formation in a severe accident. A core concept in which Duplex pellets including neutron absorber are loaded in the outer core has been proposed. Analysis by the continuous energy model Monte Carlo code MVP using the JENDL-4.0 nuclear data library revealed that this fast reactor core has large negative reactivity due to fuel melting at the time of a severe accident, so that the core prevents recriticality. Regarding the core nuclear and thermal characteristics, the loading of Duplex pellets including neutron absorber in the outer core caused no significant differences from the normal core without Duplex pellets.http://dx.doi.org/10.1155/2019/2753789 |
| spellingShingle | Toshio Wakabayashi Makoto Takahashi Naoyuki Takaki Yoshiaki Tachi Mari Yano Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor Science and Technology of Nuclear Installations |
| title | Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor |
| title_full | Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor |
| title_fullStr | Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor |
| title_full_unstemmed | Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor |
| title_short | Conceptual Study on Recriticality Prevention Core Having Duplex Pellets with Neutron Absorber in Outer Core in a Fast Reactor |
| title_sort | conceptual study on recriticality prevention core having duplex pellets with neutron absorber in outer core in a fast reactor |
| url | http://dx.doi.org/10.1155/2019/2753789 |
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