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Renaudi
e de Vaux, S.*; Li, S.*; Marrel, A.*; Ezure, Toshiki; Tanaka, Masaaki
Nuclear Engineering and Design, 444, p.114382_1 - 114381_15, 2025/12
In this study, experimental results on sodium natural circulation in PLANDTL-2 under eight transient scenarios were reported. The experimental parameters were the initial state of the primary circuit, the shutdown inertia of the secondary circuit, and the operating mode of the Decay Heat Removal system (DHRS). As the results, it was clarified that flow reversals can be observed in the primary circuit under rapid cooling cases by DHRS linked to an enhancement of thermal stratification in the plenum. A novel method was introduced to estimate the delay between DHR system activation and increase in stratification. In addition, some guidelines for future investigations were given in order to avoid the presently described instabilities.
Giroud, C.*; Jachmich, S.*; Jacquet, P.*; J
rvinen, A.*; Lerche, E.*; Rimini, F.*; Aho-Mantila, L.*; Aiba, Nobuyuki; Balboa, I.*; Belo, P.*; et al.
Plasma Physics and Controlled Fusion, 57(3), p.035004_1 - 035004_20, 2015/03
Times Cited Count：77 Percentile：95.76(Physics, Fluids & Plasmas)This paper reports the progress made at JET-ILW on integrating the requirements of the reference ITER baseline scenario with normalized confinement factor of 1, at a normalized pressure of 1.8 together with partially detached divertor whilst maintaining these conditions over many energy confinement times. The 2.5 MA high triangularity ELMy H-modes are studied with two different divertor configurations with D-gas injection and nitrogen seeding. The power load reduction with N seeding is reported. The relationship between an increase in energy confinement and pedestal pressure with triangularity is investigated. The operational space of both plasma configurations is studied together with the ELM energy losses and stability of the pedestal of unseeded and seeded plasmas.
