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Simanullang IL, Yamane Y, Ueki T, Tonoike K. The effect of β on the consequence characteristics of a postulated criticality accident using 1/fβ spectrum in randomized model of material distribution. ANN NUCL ENERGY 2022. [DOI: 10.1016/j.anucene.2022.109167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Araki S, Yamane Y, Ueki T, Tonoike T. EFFECT OF β ON EFFECTIVE MULTIPLICATION FACTOR IN 1/f β SPECTRUM RANDOM SYSTEM. EPJ WEB OF CONFERENCES 2021. [DOI: 10.1051/epjconf/202124717002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigated the effect of β on effective multiplication factor(keff) in the 1/fβ spectrum random system. The random system was generated by the 1/fβ noise model. The model is a continuous space model based on the Randomized Weierstrass function and describes the component spatial distribution with a power spectrum of 1/fβ, where f and β are the frequency domain variable and the characteristic parameter related to randomness, respectively. In this work, the two-group Monte Carlo calculations were performed to obtain the keff for a simple cubic geometry that consisted of two materials (fuel burned to 12 GWd/t and concrete). A large number of replicas having different spatial distribution and characterized by the representative β values were generated using the model, and the distribution on keff was analyzed. We found the dependency on β of standard deviation, skewness, and kurtosis of keff distribution. This result is expected to help to predict the keff distribution due to the randomizing model.
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Endo T, Nonaka A, Imai S, Yamamoto A, Sakon A, Hashimoto K. Subcriticality measurement using time-domain decomposition-based integral method for simultaneous reactivity and source changes. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2019.1706658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tomohiro Endo
- Department of Applied Energy, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Asahi Nonaka
- Department of Applied Energy, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Sho Imai
- Department of Applied Energy, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Akio Yamamoto
- Department of Applied Energy, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Atsushi Sakon
- Atomic Energy Research Institute, Kindai University, Osaka, Japan
| | - Kengo Hashimoto
- Atomic Energy Research Institute, Kindai University, Osaka, Japan
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