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処分と資源化; より安全な処分と安心できるリサイクル

Disposal and recycling; Safer disposal and reassuring recycling

西原 健司

Nishihara, Kenji

本プロジェクトでは従来の高レベル放射性廃棄物に含まれていた長寿命の核分裂生成物(LLFP)を分離し短寿命化するとともに、資源化可能な元素を分離する。LLFPの短寿命化によって、地層処分に代わり、数十mの浅い地中に安全要求を満たして処分できる可能性があることが示された。また、資源化可能な元素を安心して再利用できるように、考え得る被ばく経路に対して評価を行い、安全な放射能濃度を推定した。

In this project, long-lived fission products (LLFP) contained in conventional high-level radioactive wastes are separated and their life is reduced, and elements that can be used as resources are separated. By shortening the life of LLFP, it has been shown that it may be possible to dispose in intermediate depth of several tens of meters, meeting safety requirements, instead of geological disposal. In addition, for reassuring recycling of usable elements, possible exposure pathways were evaluated to estimate the safe concentration level of radioactivity.

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