JakobCHR.com

Quick Navigation:
 

Personal:

 Go to Home
 MS Research
 PhD Research
 Curriculum Vitae

General:

 Linux

Soon to come:

 Matlab
 On-line Stores
 Cycling
 Medicine & Health
 LaTeX
 OOP & C++
 Sony PCM-R500 DAT

Core flow path,

The most important of the flow paths is the core flow path but it is also this flow path which requires the most effort to model. In a real reactor the power distribution varies from fuel assembly to fuel assembly with the highest power generation in the middle of the reactor core and lowest power generation in fuel bundles situated on the periphery of the core. However, due to time constraints we have been forced to model the core as number of fuel assemblies, $N_{\mbox{\protect\scriptsize elm}}$ [--], which are identical in regard to both geometry and power distribution. Consequently, the core flow can be calculated by considering only one fuel assembly.

Since we only consider one type of fuel element we define the core mass flux at the core inlet, G₀ [kg/( ${\mbox{m}}^2\cdot$s)], as

$${G}_0 \;\hbox{$=$\kern-0.68em\raise1.1ex \hbox{$\scriptscr... ...ect\scriptsize elm}} A_{c,{\mbox{\protect\scriptsize elm}}} }$$ (5.1)

where $\mbox{$\dot{m}$}_i$ [kg/s] is the total recirculation mass flow rate, $N_{\mbox{\protect\scriptsize elm}}$ [--] is the total number of fuel assemblies in the core and $A_{c,{\mbox{\protect\scriptsize elm}}}$ [${\mbox{m}}^2$] is the cross-sectional flow area of one fuel assembly. Before we can start the core flow calculation we furthermore need to specify the (mixture) enthalpy of the liquid, h_i [J/kg], and the density of the liquid, $\rho_i$ [kg/${\mbox{m}}^3$] at the core inlet. Expressions for these quantities are given by equations (5.20) and (5.24).

With these inlet quantities at hand we can calculate the core flow variables. The calculation of the flow variables in the core flow path is treated in depth in chapters 6 through 9.

  Contents   Index  
 
 
 

Top Quality Developed with Danish Brain Power