Improvement of the accuracy of a 3-dimensional simulator of a BWR using a neural network

Y. Kobayashi, E. Aiyoshi

研究成果: Conference contribution

抄録

Boiling water reactors (BWRs) represent a large fraction of the world's installed nuclear power capacity. The core model of a BWR is very complex because it has many fuel assemblies and strong axial heterogeneities such as coolant voiding, partial control rod insertion, and non-uniform fuel assembly design. In order to operate a BWR safely, it is necessary to supervise the performance of the reactor core during the operation cycle. Therefore, the operation of the reactor core in a BWR is supervised using a 3-dimensional on-line simulator. In order to raise the calculation accuracy of this 3-dimensional simulator, the calculation power distribution is corrected using the neutron flux distribution obtained by the in-core instrumentation. In this paper, a model that uses a neural network was developed in order to raise the calculation accuracy of this 3-dimensional simulator further. In order to apply a neural network to the complicated reactor core of a BWR, the learning algorithm needs to be improved. Therefore, a technique using the Quasi-Newton method for renewal of the connection weights of the Back-Propagation (BP) method was developed. Using this algorithm, the convergent ability of neural network learning was improved in the strongly nonlinear problems. When this algorithm was applied to a BWR, the calculation accuracy of a 3-dimensional simulator was improved considerably.

本文言語English
ホスト出版物のタイトルISIE 2002 - Proceedings of the 2002 IEEE International Symposium on Industrial Electronics
出版社Institute of Electrical and Electronics Engineers Inc.
ページ294-298
ページ数5
ISBN(印刷版)0780373693, 9780780373693
出版ステータスPublished - 2002 1 1
イベント2002 IEEE International Symposium on Industrial Electronics, ISIE 2002 - L'Aquila, Italy
継続期間: 2002 7 82002 7 11

出版物シリーズ

名前IEEE International Symposium on Industrial Electronics
1

Other

Other2002 IEEE International Symposium on Industrial Electronics, ISIE 2002
国/地域Italy
CityL'Aquila
Period02/7/802/7/11

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 制御およびシステム工学

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