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- Material Type
- 規格・テクニカルリポート類
- Title
- Author/Editor
- 塩谷 洋樹小野 清平尾 和則佐賀山 豊安松 直人久保田 貞衣
- Publication Date
- 2002-07
- Publication Date (W3CDTF)
- 2002
- Alternative Title
- Study on the influence of the fuel Burn-up on the generation cost for FR cycle
- Periodical title
- JNC TN9400 2002-044
- Target Audience
- 一般
- Note (General)
- 出版タイプ: NAFBRサイクルにおける燃焼度と経済性の関係については、過去に幾つかの検討が行われている。いずれも、燃焼度の目標値として、炉心部分の集合体取出平均燃焼度で15$\sim$20万/MWd/tは妥当であると結論している。その後、 FBRサイクル実用化戦略調査研究(F/S)のフェーズI(平成11年度$\sim$12年度)が始まり、 FBRサイクルの原子炉建設費、再処理費、燃料製造費などの目標値の大幅な見直しが行われたことに加え、ブランケットを含む原子炉全体の取出平均燃焼度の向上の重要性が認識されたことを受けて、 今回、F/Sで実施中の最新プラント及び炉心設計を基に、燃焼度が経済性(発電原価)に与える影響を再検討した。検討に当たっては、炉心径、炉心圧損条件及び燃料クリープ寿命(Cumulative Damage Fraction:CDF)を変えずに高燃焼度化を図るものとした。検討の結果、増殖費を1.1程度で一定とした場合、原子炉全体の取出平均燃焼度の上昇により装荷燃料重量が減少し、発電原価は減少するものの、燃料製造単価の上昇や設備利用率の減少等により、炉心部燃焼度15万MWd/t(原子炉全体の取出平均燃焼度で約9万MWd/t)付近で発電原価は最小となることが分かった。また、増殖比を上げると原子炉全体の取出平均燃焼度が下がり、発電原価は上昇する。逆に増殖比を1.0近くまで下げて原子炉全体の取出平均燃焼度を上げた場合、発電原価はさらに下がることが確認された。Some studies about the relation between burn-up and economics in the FR cycle have been performed until now. The results of these studies indicate that the core fuel assemblies with average burn-up of 150$\sim$200GWd/t is proper for target value from the economic viewpoint. The phase-I of JNC's "Feasibility Studies on Commercialized Fast Reactor Cycle System (the F/S)" started from 1999. In the F/S study, reactor construction cost, reprocessing cost and fabrication cost of FR cycle were revised iargely and importance of improvement of the average burn-up for whole fuel assemblies including blanket fuels was confirmed. Accordingly, based on the newest FR plant and core designs in the F/S study, the influence of the fuel burn-up on the generation cost was examined on the assumption that core diameter, CDF(Cumulative Damage Fraction) condition and so on are constant. The results may be summarized as follows. (1)As for the constant breeding ratio case (about l.1), the generation cost becomes the minimum at around 150GWd/t as average burn-up for core fuel assemblies (or at around 90GWd/t of average burn-up for whole fuel assemblies). It is caused by both effects of decrease of fuel mass flow, and increase of fuel cycle unit cost and decrease of load factor, as fuel burn-up rises. (2)When the breeding ratio increases (addition of axial blanket fuels), the generation cost rises because average burn-up for the whole fuel assemblies decreases.
- Source
- /JNC-TN9400-2002-044.pdf (fulltext)