NuclearApplications_web

NuclearApplications_web - Applications in Nuclear Systems...

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Unformatted text preview: Applications in Nuclear Systems April 2, 2010 Nuclear Application Topics I Variable properties and acceleration pressure loss I Computation of friction factors I Pressure loss at spacers In these slides (this course), assume single-phase conditions throughout. Variable Properties Primarily due to heating (change in temperature), water in a PWR does not have the same properties throughout the core. Variable Properties Primarily due to heating (change in temperature), water in a PWR does not have the same properties throughout the core. Typically, density decreases in the direction of flow by about 10%. Variable Properties Primarily due to heating (change in temperature), water in a PWR does not have the same properties throughout the core. Typically, density decreases in the direction of flow by about 10%. As a result, both gravitational and frictional pressure loss are best estimated by an integral: Δ P fric = Z L 2- L 2 ρ ( z ) gdz (1) Variable Properties Primarily due to heating (change in temperature), water in a PWR does not have the same properties throughout the core. Typically, density decreases in the direction of flow by about 10%. As a result, both gravitational and frictional pressure loss are best estimated by an integral: Δ P fric = Z L 2- L 2 ρ ( z ) gdz (1) Δ P fric = Z L 2- L 2 f ( z ) 1 D h ρ ( z ) V ( z ) 2 2 dz Variable Properties Primarily due to heating (change in temperature), water in a PWR does not have the same properties throughout the core. Typically, density decreases in the direction of flow by about 10%. As a result, both gravitational and frictional pressure loss are best estimated by an integral: Δ P fric = Z L 2- L 2 ρ ( z ) gdz (1) Δ P fric = Z L 2- L 2 f ( z ) 1 D h ρ ( z ) V ( z ) 2 2 dz (2) However, the product ρ ( z ) V ( z ) is not a function of z . Variable Properties Primarily due to heating (change in temperature), water in a PWR...
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This note was uploaded on 07/18/2011 for the course ENU 4133 taught by Professor Schubring during the Spring '11 term at University of Florida.

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NuclearApplications_web - Applications in Nuclear Systems...

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