Subcriticality Measurement by Neutron Source Multiplication Method with a Fundamental Mode Extraction
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概要
- 論文の詳細を見る
A new neutron multiplication method has been proposed for an accurate measurement of subcriticality. The proposed method consists of two correction processes for (1) extraction of the fundamental mode from measuring data of a neutron detector that contains higher modes as well as the fundamental mode feeding from an external neutron source and (2) spatial corrections for perturbations induced by a reactivity addition in the distributions of the fundamental mode and a neutron importance field. Feasibility of the proposed method has been verified from a numerical study, although under some limitations such that the neutron multiplying system to be analyzed is small-sized and a reactivity change takes place homogeneously in a fuel loaded region. With extraction of the fundamental mode and the spatial corrections, the subcriticality can be estimated accurately even with measuring data highly contaminated with higher modes due to a detector position near to an external point neutron source. For a future application to measurement of control rod bank worth of a nuclear power plant from measuring data during a reactor physical testing, some useful guidelines have been obtained.
- 社団法人 日本原子力学会の論文
- 2003-03-25
著者
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Tsuji Masashi
Department Of Nuclear Engineering Graduate School Of Engineering Hokkaido University
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SHIMAZU Yoichiro
Department of Nuclear Engineering, Graduate School of Engineering, Hokkaido University
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SUZUKI Nobuhide
Department of Nuclear Engineering, Graduate School of Engineering, Hokkaido University
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Matsuda Takeshi
Department Of Materials Science Kitami Institute Of Technology
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Tsuji Masashi
Division Of Molecular Chemistry Graduate School Of Engineering Hokkaido University
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Tsuji Masashi
Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture
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Suzuki Nobuhide
Department Of Nuclear Engineering Graduate School Of Engineering Hokkaido University
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Shimazu Y
Hokkaido Univ. Sapporo
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Shimazu Yoichiro
Department Of Energy And Environmental Systems Graduate School Of Engineering Hokkaido University
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