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Outline

RIKEN has developed accelerator-driven compact pulse neutron systems for practical use in industrial applications and non-destructive infrastructure inspection. They are called RIKEN accelerator-driven compact neutron sources (RANS) and RANS2. RANS has succeeded to develop non-destructive inspection methods with slow and fast neutrons. One is the visualization method of the corrosion and its related water movement of painted steels and the analytical method of the quantitative estimation of the water movement in the painted steels, the other is the neutron engineering diffractometer for the texture evaluation and the austenite volume fraction estimation of iron and steel. The others are the fast neutron imaging applications. Novel reflected neutron imaging method to see through the fracture in the concrete slab has been successfully developed. The compact neutron system is expected to be widely used on-site.

Fields

Physics, Engineering, Interdisciplinary science and engineering

Keywords

Accelerator-based compact neutron system, Characterization of microstructure and texture evaluation in steels, Research and development of non-destructive inspection for infrastructures, Visualization of water and air hole in concrete slabs, Detection of　salt damage in the concrete by prompt-gamma neutron activation analysis

Subjects

1. Research and development of compact neutron system for practical use at anytime, anywhere
2. Realization of the on-site use compact neutron system
3. Non- destructive test technology with quantitative analysis
4. Ultra compact neutron salt-meter, RANS-μ
5. R&D for the water exploration and elemental analysis on the Moon and Mars

Selected Publications

1. Kobayashi, T., Ikeda, S., Otake, Y., Ikeda, Y., and Hayashizaki, N.: “Completion of a new accelerator-driven compact neutron source prototype RANS-II for on-site use” , NUCL INSTRUM METH PHYS RES A Vol.994, 165091 pp1-6 (2021).
2. 藤田訓裕，岩本ちひろ，高梨宇宙，大竹淑恵，野田秀作.: “散乱中性子イメージング法を用いた道路橋床版の滞水・土砂化検知システム”日本材料学会第21回コンクリート構造物の補修，補強，アップグレードシンポジウム論文集.Vol. 21, pp484-489 (2021).
3. Otake, Y.: “RIKEN Accelerator-driven compact Neutron systems, RANS project -RANS, RANS-II, III, RANS-μ-” J. Neutron Res. vol. 23, no. 2-3, pp119-125 (2021).
4. Wakabayashi, Y., Yan, M., Takamura, M., Ooishi, R., Watase, H., Ikeda, Y., and Otake, Y.: “Conceptual study of salt-meter with 252Cf neutron source for on-site inspection of bridge structure” J. Neutron Res. vol. 23, no. 2-3, pp207-213 (2021).
5. Xu, P.G., Ikeda, Y., Hakoyama, T., Takamura, M., Otake, Y., and Suzuki, H.: “In-house texture measurement using a compact neutron source”, J Appl Crystallogr Vol.53, pp444-454 (2020).

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