Recent progress in research and development on the neutron resonance densitometry for particle-like debris of melted fuel

粒子状溶融燃料計量のための中性子共鳴濃度分析法に関する技術開発の進捗

原田 秀郎   ; 北谷 文人  ; 小泉 光生 ; 土屋 晴文 ; 高峰 潤 ; 呉田 昌俊   ; 飯村 秀紀  ; 瀬谷 道夫; Becker, B.*; Kopecky, S.*; Mondelaers, W.*; Schillebeeckx, P.*

Harada, Hideo; Kitatani, Fumito; Koizumi, Mitsuo; Tsuchiya, Harufumi; Takamine, Jun; Kureta, Masatoshi; Iimura, Hideki; Seya, Michio; Becker, B.*; Kopecky, S.*; Mondelaers, W.*; Schillebeeckx, P.*

粒子状溶融燃料に含有される核燃料を計量するために機構が開発を進めている中性子共鳴濃度分析法の技術開発の進捗について、測定原理の他、含有されるボロン等の不純物を分析するために特別に設計した線検出器の評価、IRMMのパルス中性子発生施設GELINAで実施した試験研究の成果、及びプロトタイプ装置の設計を含め、総括的に報告する。

In this contribution, progress made in the development of NRD for the characterization of nuclear materials mixed with highly radioactive nuclides is presented, together with the basic concept and principles. The use of a special -ray spectrometer for NRCA and an evaluation of the achievable accuracy are discussed. The discussion is based on results of Monte Carlo simulations combined experimental data from measurements carried out at GELINA. In addition, a prototype compact NRD system, which will be installed at the JAEA Tokai-site, has been designed and is presented. Other results, such as the impact of the particle size and nuclear data, are presented in other contributions to this symposium.