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Ambient and personal dose assessment of a container inspection site using a mobile X-ray system |
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| Authors: | FY Hsu |
| Institution: | a Nuclear Science and Technology Development Center, National Tsing Hua University, 101, Sec. 2, Kuangfu Rd., 300 Hsinchu, Taiwan b Taichung Customs Office, Ministry of Finance, 2, Sec. 3, Chung-Chie Rd., Sha Lu, 435 Taichung, Taiwan c Department of Medical Imaging and Radiological Sciences, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, 333 Tao-Yuan, Taiwan d Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, 155 Li-Nong St., Sec. 2, Peitou, 112 Taipei City, Taiwan e Department of Biomedical Imaging and Radiological Science, China Medical University, 91 Hsueh-Shih Rd., 404 Taichung, Taiwan f School of Medical Imaging and Radiological Science, Chung Shan Medical University, 110, Sec. 1, Jianguo N. Rd., 402 Taichung, Taiwan g Department of Medical Image, Chung Shan Medical University Hospital, 402 Taichung, Taiwan |
| Abstract: | Ambient monitor and phantom studies of absorbed and effective doses by TLDs were carried out in a non-intrusive inspection station for containers, Terminal I, of Taichung harbor, Taiwan. The doses from the X-ray scan in the control room and driver waiting room, located outside of the radiation control area, were quite small and could not be distinguished from the natural background radiation. The doses in the driver cab and the inspector cab of the X-ray scan car were also within background radiation levels. The protection wall, a 40-cm thick concrete barrier, can effectively attenuate the intensity of the primary X-ray scan. The possible effective dose of a person in the container or trailer is about 3.15±0.23 μSv/scan and 2.31±0.38 μSv/scan. This dose is below the annual background dose. If someone was to be scanned by the X-ray, the effective dose would be at an acceptable level. |
| Keywords: | Container Dose X-ray scan TLD |
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