Minimum Volume of a Hom., Bare Cylindrical Reactor

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SUMMARY

The discussion focuses on determining the minimum volume of a homogeneous, bare cylindrical reactor, specifically addressing the relationship between radial and axial bucklings at minimum volume. The volume is expressed as V = πR²H, with no geometric constraints specified. The user seeks clarification on the relationship between k (effective multiplication factor) and k∞, as well as the conditions under which Vmin occurs, particularly whether (Bz)² = (Br)² = ((Bm)²)/2 is a valid assumption.

PREREQUISITES
  • Understanding of reactor physics, specifically buckling concepts.
  • Familiarity with cylindrical reactor geometry and volume calculations.
  • Knowledge of neutron multiplication factors, k and k∞.
  • Basic principles of material properties in nuclear engineering.
NEXT STEPS
  • Research the relationship between k and k∞ in nuclear reactors.
  • Study the concepts of radial (Br) and axial (Bz) buckling in reactor design.
  • Explore the derivation of volume equations for cylindrical reactors.
  • Investigate the implications of material buckling on reactor performance.
USEFUL FOR

Nuclear engineers, reactor physicists, and students studying reactor design and analysis will benefit from this discussion.

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Just trying to do a problem to find the minimum volume for a homogeneous, bare cylindrical reactor, and my main question is if the radial and axial bucklings are equal to one another at min. V or if there is some other condition that would be helpful. Thanks.
 
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Is there a constraint on geometry, e.g., height H = diameter D = 2R?

What does one know about the relationship between k and k, and between Bz and Br?

V = πR2H
 
Last edited:
There is not a constraint on the geometry. The volume is supposed to be a function of material buckling.

One doesn't know anything about k-eff or k-inf, but I am thinking we might know the relationship between Bz and Br. I'm just trying to figure out if my assumption that Vmin occurs when (Bz)^2 = (Br)^2 =((Bm)^2)/2 is a reasonable one. I haven't been able to find anything regarding the relationship in the text though.
 

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