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Povzetek: Within the framework of the EUROfusion Consortium, the Characterization of armour, heat sinks materials and joints sub-project of the Work Package Material (WP-MAT) has been dedicated to the development of different tungsten (W) monoblock mock-ups equipped with advanced materials for divertor target applications in the EU-DEMO fusion reactor. Assessing the status of the relevant joining interfaces of these mock-ups, not only after fabrication but throughout the whole component lifetime, plays a key role in the qualification process. At the ENEA Special Technologies Laboratory (TES), a number of facilities have been built to perform non-destructive inspections of plasma-facing components for fusion applications by ultrasonic testing (UT). The present work reports on the results of the UT inspections assessing the structural integrity of the relevant joining interfaces of three small-scale mock-ups provided with advanced W armour materials, specifically W-matrix with W2C inclusions consolidated by Spark Plasma Sintering (SPS), K-doped rolled W and K-doped laminated W. The UT examinations are carried out after fabrication and after the high heat flux tests (HHFT) at the neutral beam facility GLADIS. All results confirm the high-quality joining achieved by HIP and HRP. During the HHF tests of mock-ups, after a few hundred HHFT cycles defects are detected at the joining interfaces, due to debonding, delamination and W material cracks mainly affecting the loaded zone. The ultrasonic pulse-echo technique provides not only the size and position of the defects in the plane orthogonal to the ultrasonic beam, but also their depth in the material. During the analysis, the probe is inserted inside the pipe and the mock-up is examined in a cylindrical configuration. The coupling medium (demineralized water) is poured only inside the pipe. The main inspection parameters and the piezoelectric probes are chosen to obtain the maximum resolution in accordance with the thickness and joining interfaces to be analyzed.
Ključne besede: DEMO, divertor, advanced tungsten, high heat flux test, non-destructive test, ultrasonic examination
Objavljeno v DiRROS: 03.09.2025; Ogledov: 228; Prenosov: 98
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Ključne besede: chronic spontaneous urticaria, non-skin-related symptoms, malaise, feverjoint, bone, muscle pain
Objavljeno v DiRROS: 09.07.2025; Ogledov: 309; Prenosov: 209
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Povzetek: This study provides baseline information on the feeding habits of the bull ray, Aetomylaeus bovinus (Geoffroy Saint-Hilaire, 1817), in the Gulf of Venezia. Among 1557 prey items isolated from the stomachs of bull ray specimens, gastropods represented the overwhelming majority (93.8%). Within gastropods, Aporrhais pespelecani was the dominant species, followed by Gibbula magus and Bolinus brandaris – all characteristic elements of the biocoenosis of the muddy detritic bottom. We observed differences in prey structure between juveniles and adults, as well as sexes. Among fishes that proved to be particularly important in terms of biomass, the majority of prey items consisted of small pelagic fish, including pilchard (Sardina pilchardus) and horse mackerel (Trachurus sp.). This paper contributes new data on the feeding ecology of a lesser known and critically endangered batoid species.
Ključne besede: myliobatids, feeding ecology, nursery, Gulf of Venice, batoids, endangered species, marine biology
Objavljeno v DiRROS: 03.07.2025; Ogledov: 464; Prenosov: 238
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Ključne besede: pigs, autochthonous breed, fitness, heterozygosity-rich regions, runs of heterozygosity, Sus scrofa
Objavljeno v DiRROS: 07.04.2025; Ogledov: 950; Prenosov: 322
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Ključne besede: autozygosity, crossbreeding, local breeds, pigs, quantitative traits loci
Objavljeno v DiRROS: 31.12.2024; Ogledov: 713; Prenosov: 209
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