Enthalpy rise hot channel factor and Radial form factor

  • Thread starter Syed Alam
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  • #1
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I am currently designing a whole-core for small PWR.
I am calculating core life (years) vs. FdH and RFF.

What is the difference between "Enthalpy rise hot channel factor (FdH)" and "Radial form factor (RFF)"?

I have calculated "CHANNEL FDH" which is same as "RFF". Do I have to try "CHANNEL PIN FDH" for getting the correct result for "Enthalpy rise hot channel factor (FdH)"?
 

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  • #2
Astronuc
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I am currently designing a whole-core for small PWR.
I am calculating core life (years) vs. FdH and RFF.

What is the difference between "Enthalpy rise hot channel factor (FdH)" and "Radial form factor (RFF)"?

I have calculated "CHANNEL FDH" which is same as "RFF". Do I have to try "CHANNEL PIN FDH" for getting the correct result for "Enthalpy rise hot channel factor (FdH)"?
What code(s) is one using?
 
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QuantumPion
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I'm not sure what RFF is, but if it's the same thing as radial power density, the difference between FdH and RPD is that FdH is the max pin, on a pin by pin basis, while RPF is an assembly average quantity.
 
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I'm not sure what RFF is, but if it's the same thing as radial power density, the difference between FdH and RPD is that FdH is the max pin, on a pin by pin basis, while RPF is an assembly average quantity.
Thanks!
 
  • #7
QuantumPion
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Based on your other thread I believe RFF is actually the radial peaking factor, not a radial power density, but result is the same. FdH should always be higher than RFF since FdH is highest pin while RFF is highest average assembly.
 

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