Optimization of operating conditions for Gamma Emission Tomography to improve partial-defect detection accuracy within PWR-type spent nuclear fuel

IF 2.6 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Technology Pub Date : 2025-04-17 DOI:10.1016/j.net.2025.103644

Hyung-Joo Choi , Hyun Joon Choi , Hyun Cheol Lee , Yong Hyun Chung , Chul Hee Min

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引用次数: 0

Abstract

The Spent Nuclear Fuel (SNF) contains a variety of nuclear material that can be diverted for military purposes and unauthorized proliferation. To ensure safety management and non-proliferation of SNF, an effective inspection method, such as Gamma Emission Tomography (GET) is necessary. In the previous study, the Yonsei Single-photon Emission Computed Tomography (YSECT) instrument was proposed and developed. To improve inspection accuracy in the central region containing the high-density SNF rod, the operating conditions, such as energy window and rotation interval, of the YSECT instrument are optimized in this study. The tomographic images were obtained under various operating conditions, and each condition was optimized by evaluating the quality of the tomographic image. Based on the results, the optimal energy window and rotation interval were determined to be 1274 keV region and 1-degree, respectively. The Signal-to-Noise Ratio (SNR) was improved 1.32-fold with optimized energy window compared to conventional energy window (6.98 of SNR for 662 keV region). Also, the streak artifact was reduced through the application of the optimized rotation interval. These optimized conditions improved inspection accuracy for partial-defect detection. In the future, the experimental study with the mock-up of SNF and pool will be conducted to validate the optimized operating conditions.

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乏核燃料（SNF）中含有各种核材料，可能被转用于军事目的或未经授权的扩散。为确保乏核燃料的安全管理和不扩散，有必要采用有效的检测方法，如伽马射线发射断层扫描（GET）。之前的研究提出并开发了延世单光子发射计算机断层扫描（YSECT）仪器。为了提高包含高密度 SNF 棒的中心区域的检测精度，本研究对 YSECT 仪器的工作条件（如能量窗口和旋转间隔）进行了优化。在不同的操作条件下获得了断层扫描图像，并通过评估断层扫描图像的质量对每种条件进行了优化。根据结果，确定最佳能量窗口和旋转间隔分别为 1274 keV 区域和 1 度。与传统能量窗口相比，优化能量窗口的信噪比（SNR）提高了 1.32 倍（662 keV 区域的信噪比为 6.98）。此外，应用优化的旋转间隔还减少了条纹伪影。这些优化条件提高了部分缺陷检测的准确性。今后，将利用 SNF 和水池模型进行实验研究，以验证优化后的操作条件。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Engineering and Technology 工程技术-核科学技术

CiteScore

4.80

自引率

7.40%

发文量

431

审稿时长

3.5 months

期刊介绍： Nuclear Engineering and Technology (NET), an international journal of the Korean Nuclear Society (KNS), publishes peer-reviewed papers on original research, ideas and developments in all areas of the field of nuclear science and technology. NET bimonthly publishes original articles, reviews, and technical notes. The journal is listed in the Science Citation Index Expanded (SCIE) of Thomson Reuters. NET covers all fields for peaceful utilization of nuclear energy and radiation as follows: 1) Reactor Physics 2) Thermal Hydraulics 3) Nuclear Safety 4) Nuclear I&C 5) Nuclear Physics, Fusion, and Laser Technology 6) Nuclear Fuel Cycle and Radioactive Waste Management 7) Nuclear Fuel and Reactor Materials 8) Radiation Application 9) Radiation Protection 10) Nuclear Structural Analysis and Plant Management & Maintenance 11) Nuclear Policy, Economics, and Human Resource Development