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Yamamoto, Kiyoaki; Yuasa, Wataru; Uchida, Shinichi; Inose, Shoichi; Fujiwara, Shigeo
Proceedings of 16th International Symposium on the Packaging and Transport of Radioactive Materials (PATRAM 2010) (CD-ROM), 6 Pages, 2010/10
It is very important to monitor land transport conditions continually in order to implement the safe and smooth transport of nuclear materials, especially to quickly obtain the accurate visual information and carry out emergency response swiftly and properly in the event of transport accident. Plutonium Fuel Development Center of JAEA developed the system for real-time monitoring of transport conditions of nuclear materials. The location information from GPS is transmitted to ground station from transport monitoring equipment installed on vehicle of convoy via the satellite, and transmitted to the TransportControlCenter (TCC) periodically through telephone line. The location information from GPS is also directly transmitted to ground station from transport monitoring equipment by ground wave and transmitted to TCC through telephone line. In both cases, location information is shown on a monitoring panel in TCC. Image monitoring system is one for transmitting motion picture taken by cameras equipped on the roof of vehicle of convoy to TCC through ground wave and showing it on a monitoring panel in TCC. It is also possible to transmit image to TCC with this system, which is taken by the portable camera for emergency response. The camera is taken out of transport monitoring equipment, installed on the proper place, and remotely controlled from TCC. For the development of transport conditions monitoring system, following requirements were considered taking into account the use in emergency response and long-term transport, -Compactness to fit limited space on the vehicles -Applicability for conditions in vibration and temperature change anticipated in transport operation. -Long-term stability and redundancy of power supply The developed system is very useful not only for monitoring normal transport conditions but also for planning emergency response program because it can transmit accurate visual information to TCC in the event of transport accident.
Munakata, Masahiro; Tezuka, Hiroko*
Proceedings of 16th International Symposium on the Packaging and Transport of Radioactive Materials (PATRAM 2010) (CD-ROM), 8 Pages, 2010/10
We derived the applicable limits for surface contamination by using a model for radiation exposure based on an investigation of actual conditions of the transport in Japan. The dose limits for surface contamination were derived for each 415 nuclides which were included in the IAEA Safety Standard [IAEA, TS-R-1]. In the results, nuclide Ac-227 showed the maximum radiation dose on a package preparation and transport worker (Group A). Based on unit surface contamination (1 Bq/cm
), it was 0.48 mSv/a while that of the model in TECDOC-1449 showed 9.20 mSv/a. If 0.3 mSv/a is used as a reference dose, the applicable surface contamination limit of Ac-227 becomes 0.63 Bq/cm in this model and 0.03 Bq/cm in the TECDOC model. The contamination limit of the TECDOC model is much lower than that of this model. For other radionuclides, the derived limits by this model have a safety margin of about 1 order of magnitude against to the applicable limits derived by the model in TECDOC-1449.
Ouchi, Yuichiro; Kitamura, Takafumi; Shibata, Kan; Take, Tokuo*; Kamino, Yoshikazu*; Kawahara, Yasuhiro*
no journal, ,
JAEA is planning to procure MOX powder from the Rokka-sho Reprocessing Plant (RRP) of the JNFL in Aomori prefecture, as raw material to fabricate reloaded-fuel for the prototype fast breeder reactor "MONJU" and the experimental reactor "JOYO" at about 2014. A development of new packaging and a preparation of specialized transport system for responding to requirements of Category I nuclear materials have been implemented. The design of the new packaging started in 2002. A series of prototype tests using a prototype packaging has been con-ducted: heat convection test, handling test in RRP, and regulation tests according to the requirements for Type B(U)F package specified in the TS-R-1 of the IAEA safe transport regulations. The design of the dedicated transport container was conducted to accommodate as many packages as possible, based on an ISO 20-foot container. An assessment of sea transport for MOX powder was also conducted, as part of the safety assessment during transport by ship.
Kitamura, Takafumi; Tadokoro, Noboru; Shibata, Kan; Ouchi, Yuichiro
no journal, ,
Over 35 years, the Japan Atomic Energy Agency (JAEA) to promote nuclear basic research and nuclear fuel cycle done by its predecessors; JAERI and JNC (PNC) has been accumulating experiences to transport wide range of nuclear materials: MOX fuels and powder for fast breeder reactors, MOX spent fuel for post irradiation examination and uranium fuel elements for test / research reactors, etc.. This paper introduces our experiences in transporting MOX fuels and powder, and additionally technology and system in terms of transport method, emergency preparedness and quality assurance developed reflecting trends in Japan and world, then shows one of future perspectives for MOX transport.