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 atmosphere pressure gradients of spherical objects are extremely important in astrophysics and other related fields. The classical form of the gradient in a gravitation-dominated object has been widely adopted for quit a long time. But, in this form, a factor has been neglected: the “centrifugal force” that due to the thermal motion of gaseous particles in a special (not parallel) force fie...

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) ...

ASME Boiler and Pressure Vessel Code Section VIII Division 1 [1] is one of the most commonly used pressure vessel codes in the world. The Division 1 rules were originally written before the age of computers; they were intended to be solved by simple hand calculations. This simplification led to rules with a high safety margin and a conservative technical basis. In 2007, ASME published a complet...