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EC long-term studies on fusion waste management

P Rocco, K Brodén, R.A Forrest, C.B.A Forty, M Zucchetti2000年Fusion Engineering and DesignIF 1.7出版社

AbstractFusion waste management studies described here were carried out by three organizations within SEAFP-2 (safety and environmental assessment of fusion power), the long-term S & E action of the European Fusion Technology Programme. The three reactor models investigated, PM-1, PM-2, PM-3, have a power of 3000 MWth, have differing designs for all in-vessel components, but are assumed to be identical for all ex-vessel components. Neutronics and activation calculations were performed by UKAEA. Neutron induced activation and transmutation were derived from the inventory code FISPACT-97 and the EAF-97 cross-section library. Two waste management strategies were examined. The strategy employed by Studsvik Radwaste AB disregarded recycling and clearance and investigated disposal of fusion waste in repositories for fission waste. The German sites of Konrad and G6rleben and, alternatively, the Swedish sites of SFR and SFIL were been assumed as reference repositories. The strategy adopted by the Joint Research Centre, analysed recycling and clearance. Hands-on and remote handling recycling were assumed to be feasible if contact dose rate limits were fulfilled. Feasibility of clearance was assessed from limits to the specific activities of radionuclides contained in the waste, that took into account also their potential biological hazard.

日本語訳

ここで述べる核融合廃棄物管理研究は、欧州核融合技術計画の長期行動であるSEAFP-2(安全・環境評価)において、3つの機関によって実施された。調査対象となった3つの炉モデルPM-1、PM-2、PM-3は、いずれも熱出力3000 MWthであり、炉内構造物の設計はそれぞれ異なるが、炉外構造物は同一であると仮定された。中性子工学および放射化計算はUKAEAによって行われ、中性子誘起放射化と核変換は、インベントリコードFISPACT-97および断面積ライブラリEAF-97を用いて導出された。廃棄物管理戦略として2つの方法が検討された。Studsvik Radwaste ABが採用した戦略では、リサイクルとクリアランスを考慮せず、核融合廃棄物を核分裂炉廃棄物用の処分場に処分することを検討した。ドイツのコンラート処分場とゴアレーベン処分場、およびスウェーデンのSFR処分場とSFL処分場が、それぞれ参照処分場として想定された。一方、共同研究センターが採用した戦略では、リサイクルとクリアランスを分析した。接触線量率の制限値が満たされる場合、直接取り扱いおよび遠隔操作によるリサイクルが可能であると仮定された。クリアランスの可否は、廃棄物中に含まれる放射性核種の比放射能の制限値に基づいて評価され、その際には潜在的な生物学的危険性も考慮された。

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