Spatial-harmonic Neutron Spectrum Effect on Frequency-domain Modal Analysis of Regional Stability in BWR

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概要

• 論文の詳細を見る

• An analysis method for BWR regional stability is developed in frequency-domain. Conventionally, the energy spectrum of fundamental eigenfunction has been applied to the calculation of first-harmonic void reactivity instead of the spectrum of first-harmonic eigenfunction. In the present method, the fine energy spectra of first-harmonics are applied to the evaluation of void reactivity. The spectra are obtained by assembly calculation considering the geometric bucklings of spatial harmonics. The present method is applied to the Ringhals 1 benchmark test problem. Comparing the present method with the method without the spectrum of first-harmonic eigenfunction, we can estimate the effect of the spectrum on the frequency-domain modal analysis of regional stabilities in BWRs. The decay ratio (DR) of regional stability is also calculated by these two methods. It is found that the latter method tends to underestimate the absolute value of void reactivity by about 10%. By considering the spectra of first-harmonic eigenfunction, the DR of regional stability was estimated larger by about 0.05.

• 社団法人 日本原子力学会の論文
• 1999-01-25

著者

• TAKEDA Toshikazu

  Department of Urology, Keio University School of Medicine

• HASHIMOTO Kengo

  Atomic Energy Research Institute, Kinki University

• Takeda Toshikazu

  Department Of Nuclear Engineering Graduate School Of Engineering Osaka University

• AMA Tsuyoshi

  Department of Nuclear Engineering, Graduate School of Engineering, Osaka University

• IKEDA Hideaki

  In-core Fuel Management Department, Tepco Systems Corp.

• Ama Tsuyoshi

  Department Of Nuclear Energy Graduate School Of Engineering Osaka University

• Takeda T

  Division Of Sustainable Energy And Environmental Engineering Graduate School Of Engineering Osaka Un

• Ikeda Hidematsu

  In-core Fuel Management Department Tepco Systems Corp.

• Ikeda Hideaki

  In-core Fuel Management Department Toden Software Inc.

• Hashimoto Kengo

  Atomic Energy Research Institute Kinki University

• Hashimoto K

  Interdisciplinary Graduate School Of Science And Engineering Kinki University

• Ama Tsuyoshi

  Department Of Nuclear Engineering Graduate School Of Engineering Osaka University

• Hashimoto Kengo

  Interdisciplinary Graduate School Of Science And Engineering Kinki University

• Takeda Tosbikazu

  Department of Nuclear Engineering, Graduate School of Engineering, Osaka University

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