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論文

Analysis of JT-60SA scenarios on the basis of JET and JT-60U discharges

Garcia, J.*; 林 伸彦; Giruzzi, G.*; Schneider, M.*; Joffrin, E.*; 井手 俊介; 坂本 宜照; 鈴木 隆博; 浦野 創; JT-60チーム; et al.

Europhysics Conference Abstracts (Internet), 38F, p.P1.029_1 - P1.029_4, 2014/06

Creation of JT-60SA scenarios is necessary in order to make deeper analyses: Fast ions, heating schemes, MHD. Validation exercise: a series of representative discharges of the three main operational scenarios, H-mode, hybrid and steady-state have been selected for each device in order to extrapolate to JT-60SA. An extensive analysis of the main physics similarities and differences among the discharges has been carried out in order to explain results. Using integrated modelling codes CRONOS and TOPICS, benchmark of the codes is done. Predictive core turbulence simulations have been carried out with three transport models: Bohm-GyroBohm, CDBM and GLF23. Particle transport is analyzed with GLF23. Pressure pedestal predictions are simulated with Cordey MHD scaling. Fully predictive simulations of temperatures, density and pedestal have been performed with GLF23 and CDBM models for the temperatures and GLF23 for the density. Calculations for JT-60SA are performed following the best combination of models found.

報告書

我が国の長期エネルギー需給シナリオに関する検討

佐藤 治

JAERI-Research 2005-012, 32 Pages, 2005/05

JAERI-Research-2005-012.pdf:4.37MB

2050年に至る我が国のエネルギー需給の動向と原子力エネルギー利用の将来的なポテンシャルについて検討を行った。この目的のため、今後の経済成長,エネルギー原単位改善,各種エネルギー源とエネルギー技術の価格と利用可能量等を設定した。次に、これらの前提条件に基づいて原子力エネルギー利用規模の異なる3ケースの長期エネルギーシナリオを作成し、その比較評価を通じて原子力エネルギー利用の役割を検討した。この検討の結果、原子力エネルギー利用の拡大は化石燃料の消費量を低減し、エネルギーセキュリティの向上と低コストでの二酸化炭素排出量の大幅な低減に貢献できる可能性を有することが示された。

口頭

Evolution of radionuclide transport and retardation processes in uplifting crystalline rocks

Metcalfe, R.*; 川間 大介*; Benbow, S. J.*; 舘 幸男

no journal, , 

A safety case for an underground radioactive waste repository must show that the surrounding geosphere barrier will prevent or adequately retard radionuclide migration via groundwater, despite any future environmental changes. Uplift is one such environmental change that may affect some potential repository sites. This may be a particularly important issue in Japan, where possibly in future repository sites undergoing tectonically driven uplift might be considered. At early stages of a project to site a radioactive waste repository, generic safety cases are typically based on simplified/conservative assessment models. However, at an actual repository site, more realistic models are needed that account for the long-term geoenvironmental evolution and their impacts on radionuclide migration/retention. Here we review the state of knowledge about how properties of fractured crystalline rocks evolve during uplift, based on studies in Japan. Hence, we propose how this knowledge may be incorporated in assessment models in a way that strikes appropriate balance between being sufficiently realistic and sufficiently simple to allow exploration of parameter uncertainty.

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