「ふげん」廃止措置の現状

Decommissioning activities in FUGEN

北村 高一 ; 忽那 秀樹; 松嶌 聡 ; 香田 有哉 ; 岩井 紘基 

Kitamura, Koichi; Kutsuna, Hideki; Matsushima, Akira; Koda, Yuya; Iwai, Hiroki

原子炉廃止措置研究開発センター(以下「ふげん」という。)では、平成20年2月に新型転換炉原型炉施設(重水減速沸騰軽水冷却圧力管型炉)の廃止措置計画の認可を受け、それ以来、廃止措置作業に精力的に取り組んできている。放射能レベルが比較的低い施設の解体として、タービン設備の解体撤去工事を進め、様々なデータを蓄積してきている他、重水抜き出し及びトリチウム除去並びに重水の搬出等を安全かつ合理的に実施してきている。また、クリアランス制度の運用準備や原子炉本体の解体工法等の研究開発も同時に進めている。廃止措置を実施しながら、地元産業界や地元大学との共同研究等の連携に努めている他、国内外の関係機関とも情報交換を継続的に実施している。

Fugen Decommissioning Engineering Center (herein after called as "FUGEN") obtained the approval of the decommissioning program on February 2008. FUGEN has been carrying out decommissioning works based on its decommissioning program since then. Now is in initial stage, the dismantling works was launched in turbine system whose contamination was relatively low level and their various data have been accumulating. And the draining heavy water, tritium decontamination and transferring of heavy water were carried out safely and reasonably. The preparation for the clearance system and the research and development works for the reactor core dismantling have been progressed steadily as well. Meanwhile, FUGEN has affiliation with local industries and universities for collaboration research, and has exchanged the decommissioning information with domestic and overseas organizations continuously.