検索対象:     
報告書番号:
※ 半角英数字
 年 ~  年

原子炉過酷事故で生成した溶融燃料中の核物質非破壊測定技術の適用性研究と開発

Feasibility studies and development of NDA technologies for nuclear materials in the melted fuels formed in severe accidents

瀬谷 道夫; 原田 秀郎 ; 北谷 文人; 小泉 光生; 土屋 晴文; 飯村 秀紀; 呉田 昌俊; 高峰 潤; 羽島 良一; 早川 岳人; 静間 俊行; Angell, C.; Bolind, A.

Seya, Michio; Harada, Hideo; Kitatani, Fumito; Koizumi, Mitsuo; Tsuchiya, Harufumi; Iimura, Hideki; Kureta, Masatoshi; Takamine, Jun; Hajima, Ryoichi; Hayakawa, Takehito; Shizuma, Toshiyuki; Angell, C.; Bolind, A.

東京電力福島第一原子力発電所事故のような原子炉過酷事故で発生した溶融核燃料中の核物質を非破壊で精度よく測定する技術として、中性子共鳴濃度分析法(NRD: Neutron Resonance Densitometry)と大強度単色$$gamma$$線核共鳴蛍光法(LCS $$gamma$$-NRF: Laser Compton Scattering Gamma-rays - Nuclear Resonance Fluorescence)の適用性研究とその開発について説明する。溶融核燃料の取出し時の形態として、粒子状デブリと切出し形状(小石状,円柱状,板状等)デブリに分けられるが、中性子共鳴濃度分析法は粒子状デブリを対象とする方法として、また、大強度単色$$gamma$$線核共鳴蛍光法は切出し形状(小石状,円柱状,板状等)デブリを対象とする方法として、他の非破壊分析方法と比較した場合の優位性を議論するとともに、将来の開発構想についても紹介する。

This paper presents feasibility (selection) study of NDA techniques, NRD (Neutron Resonance Densitometry) and LCSG-NRF (LCS $$gamma$$-rays interrogation Nuclear Resonance Fluorescence), to measure nuclear material (NM) in debris of melted fuel with high precision. The melted fuel under consideration here is the one formed by the severe loss of coolant accidents of such as Units 1 - 3 of Fukushima-Daiichi NPP. NRD based on NRTA (Neutron Resonance Transmission Analysis) and NRCA (Neutron Resonance Capture Analysis) utilizing the TOF (Time of Flight) method is intended for measurement of NM (all isotopes of U/Pu) in particle-like debris. LCSG-NRF using intense LCS (Laser Compton Scattered) $$gamma$$-rays (mono-energetic $$gamma$$-rays) is to measure NM (all isotopes of U/Pu) in small rock-like debris and cut-shape debris (cylindrical, slab-shpape). In this paper we also summarize advantages of two techniques compared with other NDA techniques.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.