An AP1000 nuclear reactor coolant pump is considered to assess the influence of Impeller/Guide vane clearance on performances this type pumps. Experiments and numerical simulations relying an unidirectional fluid-solid coupling approach are used investigate problem (stress, strain mode rotor). The results reveal relationship existing between hydraulic performance ratio. effect ratio maximum equ...

A major objective of the European fusion program is design DEMOnstration power plant named DEMO. Up to now, most experiments have been dedicated a plasma physics investigation while, in DEMO-oriented activities, large attention devoted also other systems necessary produce tritium and convert electricity. The blanket region, responsible for breeding, characterized by high concentrations, tempera...

Abstract The safety injection system (RIS)is a large and complex fluid in nuclear power plant. Its central role is to ensure the of core event breach first circuit In order investigate timing safe at time Small-Break Loss-Of-Coolant Accident (SBLOCA), this paper uses GO-FLOW method model seven points three operational phases system. calculation completed conjunction with failure rate each compo...

Increasing the combustion temperatures in a gas turbine engine to achieve higher efficiency and power output also results in high heat loads to turbine components downstream of the combustor. The challenge of adequately cooling the nozzle guide vane directly downstream of the combustor is compounded by a complex vortical secondary flow at the junction of the endwall and the airfoil. This flow t...

PURPOSE When epileptogenic regions encroach on eloquent brain, surgery may incur unacceptable deficits. Reversible cooling may control seizures while preserving function. We describe the effects of cooling kindled seizures in awake, freely moving rats. METHODS We kindled rats after placement of a bipolar electrode and a copper cooling coil in dorsal hippocampus. Fully kindled animals (three c...

The effect of different cutting fluids on surface roughness brass alloy workpiece during turning operation was carried out in this research. This performed with speed, while other parameters had been regarded as constants(feeding rate , and depth cut). Surface machined parts that will be tested by electronic tester .The results show the standard coolant gives best values for fixed speed ,follow...

In this work, conventional (non-coherent), coherent-jet, and high pressure coolant delivery systems are compared for profile creep-feed grinding, under non-continuous dressing conditions. To facilitate this comparison, an analytical method of determining the available flow (coolant that hits the wheel or workpiece) was presented. The coolant delivery systems were compared for five different fee...

Titanium alloy (Ti-6Al-4V) can be economically machined with high-pressure coolant (HPC) supply. In this study, an artificial neural network (ANN) model was developed for the analysis and prediction of tool wear parameters when machining Ti-6Al-4V alloy with conventional flow and high-pressure coolant flow, up to 203 bar. Machining trials were conducted at different cutting conditions for both ...