The inspections performed in Davis Besse and the South Texas Project Unit-I reactors pointed out safety issues regarding structural integrity of Pressure Vessel (PV). In these inspections, two anomalies were found: a wall thinning degradation PV upper head reactor small amount residue around instrument-tube penetration nozzles located lower plenum reactor. evolution defects could have resulted ...

The article describes the design and strength calculation of a low-pressure steel tank, which is used for storage hydrogen in metal alloy based on Ti Zr. An external liquid heat exchanger considered hydride tank. Strength calculations were performed to verify selected wall thickness vessel bottom type according STN EN 13322-2 standard implementation tank operating conditions.

RATIONALE The role of hypertension in cerebral small vessel disease is poorly understood. At the base of the brain (the 'vascular centrencephalon'), short straight arteries transmit blood pressure directly to small resistance vessels; the cerebral convexity is supplied by long arteries with many branches, resulting in a drop in blood pressure. Hypertensive small vessel disease (lipohyalinosis) ...