Effect of Moderator Density Distribution of Annular Flow on Fuel Assembly Neutronic Characteristics in Boiling Water Reactor Cores
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概要
- 論文の詳細を見る
The effect of the moderator density distribution of annular flow on the fuel assembly neutronic characteristics in a boiling water nuclear reactor was investigated using the SRAC95 code system. For the investigation, a model of annular flow for fuel assembly calculation was utilized. The results of the assembly calculation with the model (Method 1) and those of the fuel assembly calculation with the uniform void fraction distribution (Method 2) were compared. It was found that Method 2 underestimates the infinite multiplication factor in the fuel assembly including the gadolinia rod (type 1 assembly). This phenomenon is explained by the fact that the capture rate in the thermal energy region in gadolinia fuel is estimated to be smaller when the liquid film of annular flow at the fuel rod surface is considered. A burnup calculation was performed under the condition of a void fraction of 65% and a volumetric fraction of the liquid film in liquid phase of 1. It is found that Method 2 underestimates the infinite multiplication factor in comparison to Method 1 in the early stage of burnup, and that Method 2 becomes to overestimate the factor after a certain degree of burnup. This is because Method 2 overestimates the depletion rate of the gadolinia.
- 社団法人 日本原子力学会の論文
- 2002-05-25
著者
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TAKEDA Toshikazu
Department of Urology, Keio University School of Medicine
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Takeda Toshikazu
Department Of Nuclear Engineering Graduate School Of Engineering Osaka University
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AMA Tsuyoshi
Department of Nuclear Engineering, Graduate School of Engineering, Osaka University
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IKEDA Hideaki
In-core Fuel Management Department, Tepco Systems Corp.
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KOSAKA Shinya
In-core Fuel Management Department, Tepco Systems Corp.
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HYOUDOU Hideaki
Department of Nuclear Engineering, Graduate School of Engineering, Osaka University
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Ama Tsuyoshi
Department Of Nuclear Energy Graduate School Of Engineering Osaka University
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Takeda T
Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un
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Ikeda Hidematsu
In-core Fuel Management Department Tepco Systems Corp.
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Ikeda Hideaki
In-core Fuel Management Department Toden Software Inc.
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Kosaka Shinya
In-core Fuel Management Department Tepco Systems Corp.
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Hyoudou Hideaki
Department Of Nuclear Energy Graduate School Of Engineering Osaka University
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Ama Tsuyoshi
Department Of Nuclear Engineering Graduate School Of Engineering Osaka University
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Takeda Toshikazu
Department of Nuclear Energy, Graduate School of Engineering, Osaka University
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