Development of radioactive sample measurement device for small-angle neutron scattering spectrometer

被引：0
|
作者：
Hu W. [1 ]
Yan S. [1 ]
Li T. [1 ]
Wang Z. [1 ]
Chen Z. [1 ]
Liu R. [1 ]
Wang C. [2 ]
He X. [1 ]
Ran H. [1 ]
Sun K. [1 ]
Chen D. [1 ]
机构：
[1] China Institute of Atomic Energy, Beijing
[2] Nuclear and Radiation Safety Center, Beijing
来源：
He Jishu/Nuclear Techniques | 2024年 / 47卷 / 06期
基金：
中国国家自然科学基金;
关键词：
A508-III steel; Nanostructure; Radioactive sample; Small-angle neutron scattering;
D O I：
10.11889/j.0253-3219.2024.hjs.47.060202
中图分类号：
学科分类号：
摘要：
[Background] The study of irradiated samples is of considerable importance. Owing to these samples being radioactive, the applicability of conventional characterization methods is limited. Because of the high sensitivity of 3He detectors to neutrons, the small-angle neutron scattering (SANS) technique is nearly unaffected by radiation such as gamma, beta rays, and sample preparation is simple. [Purpose] This study aims to develop a device for SANS measurement of nanostructures in radioactive samples. [Methods] The shielding thickness of the device was optimized through Monte Carlo simulations. Experimental efficiency and safety of the device were improved by combining remote-control functionality and automated sample switching among up to 12 samples loaded simultaneously. Finally, the device was used to carry out a SANS experiment for characterizing the radioactive A508-III steel sample. [Results] The optimized thickness of the lead shielding layer of the device is 7.5 cm, the corresponding maximum dose rate of the measurable radioactive sample is 1.4 mSv·h-1. The results of successful SANS experiment on a A508-III steel irradiation surveillance specimen indicate that low-dose, long-term irradiation has a minimal impact on the nanostructure of pressure vessel steel.[Conclusions] The device and associated technical methods can be applied for nanostructure characterization of radioactive samples. © 2024 Science Press. All rights reserved.
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  • [1] SUN Kai, LI Tianfu, CHEN Dongfeng, Development and application of neutron scattering and related technologies [J], Atomic Energy Science and Technology, 54, S1, pp. 35-46, (2020)
  • [2] LI Tianfu, WU Meimei, JIAO Xuesheng, Et al., Current status and future prospect of neutron facilities at China advanced research reactor[J], Nuclear Physics Review, 37, 3, pp. 364-376, (2020)
  • [3] Windsor C G., An introduction to small-angle neutron scattering[J], Journal of Applied Crystallography, 21, 6, pp. 582-588, (1988)
  • [4] Jazaeri H, Bouchard P J, Hutchings M T, Et al., Application of small angle neutron scattering to study creep cavitation in stainless steel weldments[J], Materials Science and Technology, 31, 5, pp. 535-539, (2015)
  • [5] Chan K S, Page R A., Creep damage development in structural ceramics[J], Journal of the American Ceramic Society, 76, 4, pp. 803-826, (1993)
  • [6] Odette G R., On the dominant mechanism of irradiation embrittlement of reactor pressure vessel steels[J], Scripta Metallurgica, 17, 10, pp. 1183-1188, (1983)
  • [7] Balzar D., Coherency strain and dislocations in copper-rich-precipitate embrittled A710 ferritic steels[J], Metallurgical and Materials Transactions, 43, 5, pp. 1462-1467, (2012)
  • [8] Wang Z, Du X, Li T, Et al., Investigation of Cu-enriched precipitates in thermally aged Fe-Cu and Fe-Cu-Ni model alloys, Journal of Nuclear Materials, 562, (2022)
  • [9] Lucas G., An evolution of understanding of reactor pressure vessel steel embrittlement[J], Journal of Nuclear Materials, 407, 1, pp. 59-69, (2010)
  • [10] Bohmert J, Viehrig H, Ulbricht A., Correlation between irradiation-induced changes of microstructural parameters and mechanical properties of RPV steels[J], Journal of Nuclear Materials, 334, 1, pp. 71-78, (2004)
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