The verification of the fuel integrity is one of the important challenges in nuclear power plants. Also, the International Atomic Energy Agency (IAEA) monitors and controls the nuclear inventory of member states called safeguard verification. Nowadays, The Gamma Emission Tomography (GET) as a powerful tool use for above-mentioned verifications. In this paper, a GET system was simulated to investigate its feasibility for identifying the partial defect as a type of safeguards verification. The simulation includes three steps: (a) forward problem (calculation of source term and simulation of GET system in MCNPX code), (b) inverse problem (producing cross-sectional image of the fuel assembly from gathered gamma ray recorded in GET system detectors by FBP Algorithm), (c) data analysis (using our new developed algorithm which calculates the relative activity in all rods of the fuel assembly by the cross-sectional image data). It is shown that the mentioned algorithm calculates relative activities with appropriate accuracy.

中文翻译：

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用于燃料组件安全验证的伽马发射断层扫描的可行性

燃料完整性的验证是核电厂的重要挑战之一。此外，国际原子能机构 (IAEA) 监测和控制成员国的核库存，称为保障核查。如今，伽马发射断层扫描 (GET) 作为一种强大的工具用于上述验证。在本文中，模拟了一个 GET 系统，以研究其将部分缺陷识别为一种保障验证的可行性。模拟包括三个步骤：（a）正向问题（计算源项和模拟 MCNPX 代码中的 GET 系统），（b）逆向问题（从 GET 系统探测器中记录的收集伽马射线生成燃料组件的横截面图像通过 FBP 算法），(c) 数据分析（使用我们新开发的算法，通过横截面图像数据计算燃料组件所有棒的相对活性）。结果表明，上述算法以适当的精度计算相对活动。