Study on Tracking System for Radioactive Material Transport

None

渡辺 文隆 ; 五十嵐 幸; 野村 保; 中込 良廣*

Watanabe, Fumitaka; not registered; Nomura, Tamotsu; Nakagome, Yoshihiro*

事業所外輸送事故が発生した場合、事業者のみならず、地元の自治体、警察・消防などの緊急時対応組織、および国の関係省庁、派遣される支援専門家等が連携して、事故対処にあたる必用がある。輸送事故対応能力の向上を狙いとして国内の輸送を監視する輸送監視システムについて開発検討が進められてきた。今後適用に向け、検討を進めていく。

The application of the fluoride volatility process in the reprocessing of fuel from the fast breeder reactor is regarded as one of the economical methods. Plutonium hexafluoride (PuF6), however, reacting with fluorine (F2) and plutonium dioxide (PuO2) as the raw material, is in an unstable condition and tends to remain as a solid compound in the process after decomposing into plutonium tetrafluoride (PuF4). Suitable conditions should be established for the practical use of this process. One of them is to enhance the stability of PuF6. The behaviour of plutonium fluorination and relevant chemical reactions were investigated by referring to sundry literature and by thermodynamic calculation. It was then compared with recent data from laboratory scale experiments for this paper. Results from the theoretical analysis agreed with experimental observation that PuF6 could be formed stably under a high temperature condition (approx.1000 K) with over supply of figher concentration of F2.