Research on high precision reactor noise analysis based on neutron transport theory for reactor core diagnosis
| Project/Area Number |
17K07011
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2017: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
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| Keywords | 中性子 / 炉雑音 / 原子炉 / 異常診断 / 輸送理論 / モンテカルロ / 周波数領域 / モンテカルロ法 / 感度解析 / 原子炉雑音 / 中性子輸送 |
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| Outline of Final Research Achievements |
A Monte Carlo calculation method for analyzing neutron noise propagation in a nuclear power reactor core caused by abnormal vibration of an in-core component has been developed. The method has been applied to analyses of neutron noise experiments in critical assemblies, where the neutron noises were produced by vibration of fuel or neutron absorber. Whereas the method does not yield sufficiently accurate result for the fuel vibration, reasonably accurate result is obtained for the absorber vibration. The method is applied to an experiment where void velocity in a water channel was measured using noise method in the critical assembly. A unique feature in the velocity measurement is revealed via the Monte Carlo analyses. The deviation of neutron noise in a reactor core from the point kinetics theory is investigated. A sensitivity analysis method for calculating sensitivity of neutron noise with respect to group constants that are used for neutron noise analyses has been developed.
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| Academic Significance and Societal Importance of the Research Achievements |
モンテカルロ法の粒子輸送計算では、定常状態或いは時間依存の解析が従来から行われてきたが、原子力分野において複素数のウェイトを用いた周波数領域の解析は、研究代表者が世界に先駆けて開発したものである。この手法の炉心異常診断等への適用可能性を示したことで、モンテカルロ法の適用分野を大きく切り拓いたといえる。成果はCORTEX計画において高精度参照解として採用され計画の推進に貢献した。
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Report
(6 results)
Research Products
(21 results)
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[Presentation] Comparison of neutron noise solvers based on numerical benchmarks in a 2-D simplified UOX fuel assembly2021
Author(s)
P.Vinai, H.Yi, A.Mylonakis, C.Demaziere, B.Gasse, A.Rouchon, A.Zoia, A.Vidal-Ferrandiz, D.Ginestar, G.Verdu, T.Yamamoto
Organizer
The International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering
Related Report
Int'l Joint Research
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