NHKスペシャル「原発解体〜世界の現場は警告する〜」(1)

【動画】http://t.co/Gjfv30wN

2009年10月11日にNHKで放送された番組。メモしたので共有します。自分用なのでバラつきはごめん。ビックリしたところは色つけときました。

(1)

原子炉は運転を終えても数百年放射能が消えない/世界の原子力発電所は539基、うち100基以上がすでに閉鎖/日本では2基、ドイツでは15基が解体中/英では放射性廃棄物処理に大量の税を投入

福井の「ふげん」は2008から解体中/汚染の少ないところから解体し、原子炉は最後に/カメラが初めて主蒸気管室へ/緊急に止めるときに使われる大型バルブの解体の様子→別の配管切断に問題/狭くて電動ノコギリが使えないためバーナーで切断/バーナーの高温ガスによる”ヒューム”(放射性物質を含む気体)が発生するのでさらに危険

放射線管理員が作業員と別に存在し、ヒュームを10分に1回測定/作業工程は、放射能による作業時間の遅れと、マスクをつけての作業が予想以上にきついことから、全体として1ヶ月以上の遅れ

原子力開発利用長期計画についてナレーション「昭和31年に出来た最初の計画の中に、解体についての記述はありませんでした

原子力研究バックエンド推進センター 榎戸 裕二さん「頑丈に作ることが第一で、解体を特に考慮した設計ではなかった」→ 健全性、安全性の確保を主に考慮し、解体については将来の技術開発によって対応、または今後の技術開発をすることによって充分な技術が確保できるという考えのもとにやっている。近い将来の課題とは考えていなかった。

国が解体しやすい原発の研究を始めたのは(やっと)昭和60年代。しかし、今も国は解体を考慮した設計を建設の条件にはしていない

日本最初の原発は昭和41年(1966)の東海発電所。その後、電力需要と共に増えて57基 

東海発電所は11年前に運転を停止/原子炉の解体に向けた準備/5年かけて、配管やタービンなどを解体してきた/現在は原子炉周辺を撤去/だが現場に思わぬ問題が

原子炉は人が入れない→初めてロボットを導入→コンピューターで遠隔操作の訓練→詳しい構造と詳細な寸法を入力する必要→必要な図面が見つからない→建設が40年以上前と昔で、保管義務のない書類も少なくないため

長くなるので(2)に続く


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