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Vol.5 No.1 previous AA SP9 (59-60-61-62-63-64-65-66)-67-NT 56 -57

Academic Articles
Regular Paper Vol.5No.2 (2013) p.93 - p.100
 

Commissioning of portable 950 keV/3.95MeV X-band linac X-ray sources for on-site transmission testing

 
Mitsuru Ueaska 1,*, Ming Jin1, Wenjing Wu1, Katsuhiro Dobashi1, Takeshi Fujiwara1, Jyoichi Kusano2, Naoki Nakamura2, Masashi Yamamoto2, Eiji Tanabe2, Seiji Ohya3, Yukiya Hattori3, Itaru Miura4
 
1University of Tokyo, Nuclear Professional School/Department of Nuclear Engineering and Management, 2-22 Shirakata-shirane, Tokai, Naka, Ibaraki, 319-1188, Japan
2Accuthera Co., 2-7-6 Kurigi, Asaoku, Kawasaki, 215-0033, Japan
3Hitachi Power Solutions, 3-2-2 Saiwai, Hitachi, Ibaraki 317-0073, Japan
4Mitsubishi Chemical, 17-1 Towada, Kamisu, Ibaraki 314-0102, Japan
 
Abstract
Development of portable 950keV/3.95MeV X-band (9.3GHz) linac X-ray sources has been almost successfully completed. Designed X-ray intensities of 0.05, 2 Gy/min at 1m have been achieved. Those intensities have been established with the portable three/four boxes with 182/386 kg in total, respectively, for the first time in the world. Equivalent commercial systems using S-band (2.856GHz) 950keV/3 MeV linac X-ray sources weighs about 1.5/1.7 tons, respectively. We have optimized the design with respect to the X-ray intensity, compactness and weight. By using the 950 keV system, we can get transmission views of artificial exterior wall thinning defects of petrochemical pipe of 8 mm thick and 300 mm diameter by 1 sec using the Perkin Elmer X-ray camera in the experimental room. By using a commercial 300 keV X-ray tube, the same transmission images are obtained by several minutes by an Imaging Plate (IP). 3.95 MeV system also enables 1 sec transmission test for 400 mm thick PC (Prestressed Concrete) bridge samples. By using 300 keV X-ray tube, it takes about one hour to get the similar image by IP. We have already performed the first on-site inspection using the 950 keV system at a certain chemical plant. The targets of the 950 keV system are chemical plants, petrochemical plants, impeller of pumps, wastaged pipes and iron bridge while those of the 3.95 MeV system are PC-, RC (Reinforced Concrete) - bridges. Partial CT technique and new X-ray detectors having better sensitivity for harder X-rays than 100 keV are under development.
 
Keywords
Portable 950keV/3.95MeV X-band linac X-ray sources, on-site transmission testing
 
Full Paper: PDF EJAM Vol.5No.2 pp.93-100 "Commissioning of portable 950 keV/3.95MeV X-band linac X-ray sources for on-site transmission testing "
















Article Information
Article history:
Received 19 November 2012
Accepted 4 April 2013