Sample thickness effect on nuclear material quantification with NRTA for particle like debris of melted fuel
土屋 晴文; 原田 秀郎 ; 小泉 光生; 北谷 文人; 高峰 潤; 呉田 昌俊; 飯村 秀紀; Becker, B.*; Kopecky, S.*; Kauwenberghs, K.*; Moens, A.*; Mondelaers, W.*; Schillebeeckx, P.*
Tsuchiya, Harufumi; Harada, Hideo; Koizumi, Mitsuo; Kitatani, Fumito; Takamine, Jun; Kureta, Masatoshi; Iimura, Hideki; Becker, B.*; Kopecky, S.*; Kauwenberghs, K.*; Moens, A.*; Mondelaers, W.*; Schillebeeckx, P.*
Neutron resonance densitometry (NRD) is based on a combination of neutron resonance transmission analysis (NRTA) and neutron resonance capture analysis (NRCA). This non-destructive technique is considered for the quantification of nuclear materials in samples of melted fuel that will be removed from the Fukushima Daiichi Nuclear Power Plant. However, NRD has never been applied for measurements of melted fuel, and the measurements are considered to be difficult because of the characteristics of the samples. To verify the effectiveness of NRD, all components having an impact on the results have to be investigated. The uncertainty of the result is strongly influenced by the characteristics of the sample, in particular the sample inhomogeneity, particle size, presence of neutron absorbing impurities, radioactivity and temperature. To estimate the impact of the sample characteristics, JAEA and JRC-IRMM have started a collaboration. Within this collaboration experiments are in progress at the Time-Of-Flight facility of the EC-JRC-IRMM. In this presentation, results of neutron transmission measurements on Cu samples with different thicknesses at a 25-m flight path are reported. The data, which are analyzed with a resonance shape analysis code REFIT, are used to verify the effect of the particle size and the presence of neutron absorbing impurities. Some of the results are also used to validate data obtained by Monte Carlo simulations.
使用言語 : English
掲載資料名 : Proceedings of INMM 54th Annual Meeting (CD-ROM)
ページ数 : 6 Pages
発行年月 : 2013/07
出版社名 :
発表会議名 : INMM 54th Annual Meeting
開催年月 : 2013/07
開催都市 : Palm Desert
開催国 : U. S. A.
特許データ :
論文URL :
キーワード : 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 : JRC-IRMM
登録番号 : BB20123507
抄録集掲載番号 : 42000098
論文投稿番号 : 13638
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