During a design basis accident in pressurized water reactor (PWR), the released hydrogen through breaks would induce detonation. The passive autocatalytic recombiner (PAR) is widely used as elimination measure nuclear power plants due to its capability, low starting threshold and easy installation. present work aims study risk after occurrence of cold section double-end shear fracture large bre...

High-resolution X-ray imaging was employed at the JAEA MELT facility to visualize a kilogram-scale interaction between jet of high temperature molten stainless steel and sodium, mimicking sodium-cooled fast-neutron reactor in aftermath core-disruptive accident. A novel software, SPECTRA, has been developed for quantitative characterization quenching fragmentation. Tracking 3D reconstruction mel...

Over the past two decades, a substantial amount of research has been conducted — in the United States during the early days and later in other countries as well — to improve the understanding of severe accident phenomena for more realistic assessment of the associated risk and to address epistemic uncertainties. This research has resulted in resolution of issues from a risk perspective (e.g., c...

purpose : visual loss associated with multiple traumas in the context of road traffic accident, especially when the maxillofacial and orbital areas are not directly injured, is an uncommon occurrence. the possibility of purtscher’s retinopathy, i.e. retinal manifestation of mechanical trauma elsewhere in the body, as the cause of visual disturbance in these situations can often be overlooked. p...

Within the framework of EUROfusion research activities on DEMO Water-Cooled Lithium Lead (WCLL) Breeding Blanket (BB) design, a study was performed to preliminarily optimize, from thermal point view, WCLL Central Outboard (COB) segment in order investigate its structural behaviour under realistic field. In particular, analyses optimize Double Walled Tubes and Segment Box cooling channels’ geome...

The process for developing and qualifying nuclear fuels commercial application requires fundamental material development, characterization, design; out-of-pile testing on unirradiated materials; integral fuel rod irradiations, testing, postirradiation examinations; transient analyses. historical approach depends the generation of large empirical datasets series this ultimately takes ∼20 years—o...

This thesis looked at the effect of clay and silt soil blocking the heat transfer area of the radiator and its effect on the engine coolant through the conduct of experiments and a mathematical model developed. The results indicated that the percentage area covered resulted in a proportional increase of the inlet and outlet temperatures of the coolant in the radiator. The mathematically mode...