机动式高能X射线照相系统通过对9 MeV电子直线加速器进行小型化设计，能够机动至贮存场所，实现了固体火箭发动机的靠前检测。开放工房防护条件较差，但可以利用地势或专门构筑屏蔽墙有效减小射线强度，同时采取距离防护，确保人员与环境的辐射安全。为保证变换场地后检测结果的质量与一致性，制定了配套的检测规范与质量控制措施。经过几年的使用，机动系统检测出了大量药柱气孔、界面脱粘、夹杂等缺陷，为分析贮存和使用过程的发动机质量，指导发动机设计、生产起到了重要作用。

Mobile high-energy X-ray radiography system(MRG), which is a truck-carried miniaturized 9MeV electron linear accelerator, can move to solid rocket motors’ storeroom. This makes it possible to do on the spot nondestructive testing for these large objects. The storerooms have almost no any radiation protection measures, so large distance from the source, geometric advantages or man-made protection walls are used to attenuate the high energy X-ray. Process and quality control principles have been made to ensure the coherence and quality of NDT in different places. A large number of grain voids, interfacial debonding, inclusions and other defects have been detected by this system after running several years. The NDT results have played important roles in judging the quality of SRM and guiding the SRM design and production.