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Study of the wettability of fusion relevant steels by the sodium-potassium eutectic alloy NaK-78

Abou-Sena, A.; Arbeiter, F.; Böttcher, T.

Abstract:
Several validation activities were dedicated for the High Flux Test Module (HFTM) of the International Fusion Materials Irradiation Facility (IFMIF) at KIT. The HFTM contains 24 capsules packed densely with Eurofer specimens to facilitate their irradiation in the high flux zone directly behind the IFMIF neutron source. The small gaps among the Eurofer specimens are filled by the sodium-potassium eutectic alloy NaK-78 to improve the thermal conduction among the specimens and achieve uniform and predictable temperature distribution. As a result of first trials, the filling of NaK-78 into the specimen stack had been identified as an issue worth further investigations. Therefore, the wettability of Eurofer (and for comparison 316L steel) specimens by NaK-78 is investigated by two experiments to evaluate the applicability of this concept and identify favorable conditions. In the first experiment, the capillary rise of NaK-78 in a twoparallel-plates channel was investigated by considering the following: (i) temperature of both NaK-78 and the parallel plates from 30 to 350°C, (ii) different machining techniques and surface roughness for th ... mehr


Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Poster
Jahr 2015
Sprache Englisch
Identifikator KITopen ID: 220102249
HGF-Programm 31.03.09; LK 01
Erschienen in 17th International Conference on Fusion Reactor Materials, October 12- 16, 2015. Aachen
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