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TRU composition changes and their influence on FBR core characteristics in the LWR-to-FBR transition period

軽水炉-高速炉移行期のTRU組成変動及び炉心特性への影響

丸山 修平; 大木 繁夫; 水野 朋保

Maruyama, Shuhei; Oki, Shigeo; Mizuno, Tomoyasu

日本で行われている高速増殖炉サイクル実用化研究開発(FaCT)プロジェクトの炉心・燃料設計研究では、軽水炉-高速炉移行期における高速炉の燃料組成の変動に関心が持たれている。本論文では、移行期の高速炉に供給されるTRU組成の変動幅をさまざまなリサイクルシナリオで評価するとともに、TRU組成変動に伴う炉心特性への影響についてもその要因とともに論ずる。

In the conceptual core and fuel design studies in Fast Reactor Cycle Technology Development Project (FaCT Project) in Japan, much interest has been taken in the fuel nuclide compositions for a transition period from light water reactor to fast breeder reactor (FBR). In this paper, the range of transuranic (TRU) nuclide composition to be provided to FBR is evaluated with extended recycling scenario calculations. The influence of TRU composition changes on FBR core characteristics are also discussed with explanations of major contributing factors.

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