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Direction of reprocessing technology development based on 30 years operation of Tokai Reprocessing Plant

東海再処理工場の30年間の運転に基づく再処理技術開発の方向

野村 茂雄

Nomura, Shigeo

JAEAの東海再処理工場(TRP)はおもに国内の軽水炉(LWR)と新型転換炉「ふげん」(ATR)の使用済み核燃料の再処理を実施するため、1970年代に設計した。東海再処理工場の安定運転までには、プロセスの全工程において機器故障,酸による溶解槽と蒸発缶の腐食,放射性物質の放出量低減、及び廃棄物発生量の削減など多くの要件に挑戦する必要があった。これらを解決することで、再処理技術の円熟が達成できた。次世代再処理システムに用いられる技術は、東海再処理工場の30年間の運転経験で得た研究開発結果の中から、革新的な技術を最も良い組合せで実用化されると考える。

Tokai Reprocessing Plant (TRP) of JAEA was designed 1970s to reprocess nuclear spent fuel (NSF) mainly from domestic Light Water Reactors (LWR) and Advanced Thermal Reactor (ATR) "Fugen". It was necessary to challenge many requirements for steady operation of plant due to mechanical troubles in head-end process, acid corrosions of dissolver vessel and evaporator tubes, strict environmental restriction to release activity, and reduction of waste volume. Through these solutions, the maturity of current reprocessing technology was achieved. The next generation reprocessing system for Fast Reactor (FR) cycle will be industrialized by the best combination of innovative technologies from R&D efforts and the supporting technologies obtained by 30 years plant operation experiences.

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