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Development of monitoring system for land transport conditions of nuclear materials

核燃料物質輸送監視システムの開発

山本 清明; 湯浅 亙 ; 内田 伸一 ; 井野瀬 晶一; 藤原 茂雄 

Yamamoto, Kiyoaki; Yuasa, Wataru; Uchida, Shinichi; Inose, Shoichi; Fujiwara, Shigeo

核燃料物質の安全で、かつ、円滑な輸送を実施するためには、輸送状況を常に監視するとともに、輸送事故発生時には正確な画像情報を速やかに入手し、緊急時対応を迅速、かつ、的確に行うことが極めて重要である。日本原子力研究開発機構プルトニウム燃料技術開発センターでは核燃料物質の輸送状況をリアルタイムで監視するシステムを開発し、実輸送に運用している。輸送状況監視システムは、おもに輸送隊の位置及び輸送状況画像を監視するシステムから構成されている。位置情報監視システムは、GPSからの位置情報を衛星波及び地上波により輸送実施本部に送信し、監視パネル上に表示するシステムである。画像情報監視システムは、輸送隊の車両に積載されたカメラで撮影された動画情報を地上波により輸送実施本部に送信し、監視パネル上に表示するシステムである。また、監視機器から可搬カメラ等を取り出し、必要な場所に設置し、緊急時対応用に、正確な可視情報を入手するシステムも設置されている。このカメラは輸送実施本部から遠隔で操作される。開発されたシステムは、通常輸送状態の監視はもとより、万が一の事故発生時にも事故時対応計画を立案するのに非常に役立つ。

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.

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