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  • One and two dimensional space-energy flux synthesis with spatially discontinuous trial functions

    Creator:
    Olson, Willard Orvin
    Abstract:
    The development of nuclear reactors as an energy source requires a substantial investment in capital and effort. This development depends heavily on accurate calculational methods. Space-energy flux synthesis, also variously called the spectral synthesis method, modal method, and overlapping group method, is one possible method. In this method the energy...
    Resource Type:
    Dissertation
    Full Text:
    Relation Between Regional and Interface Weighting 91 5.2.6 Sodium Void and Doppler Coefficients 92 5.3

  • High speed motion neutron radiography

    Creator:
    Bossi, Richard Henry
    Abstract:
    A system to perform neutron radiographic analysis of dynamic events taking place over the order of several milliseconds has been developed at Oregon State University. The design consists of a TRIGA reactor capable of pulsing to 3000 MW peak power, a neutron beam collimator with an L/D of about 30:1,...
    Resource Type:
    Dissertation
    Full Text:
    combination of the cell effect, doppler effect and leakage. The cell effect is the previously described ZrH n

  • Energy models for computing fast reactor parameters

    Creator:
    Lorenzini, Paul Gilbert
    Abstract:
    Because of the complicated form of the diffusion equation, approximations are necessary to treat the energy dependence for practical problems. The standard model is the few group approximation. A second approximate form, the overlapping group or modal method, is examined and more fully developed in this work to provide an...
    Resource Type:
    Dissertation
    Full Text:
    spacing for the General Electric fast reactor. 42 5.1 Doppler broadening of the capture cross section of

  • A simulated two-group method for computing boiling water reactor power distributions

    Creator:
    Hatteberg, Ronald Leonard
    Abstract:
    A computer code capable of modeling the burnup dependent static behavior of a boiling water reactor was developed. The code calculates three-dimensional quarter core power distributions using a simulated two-group diffusion theory model. Thermal-hydraulic calculations account for the interaction between power, coolant flow, and void fraction distributions. Cross sections are...
    Resource Type:
    Masters Thesis

  • A method for calculation of group-averaged resonance parameters

    Creator:
    Nail, James Harold
    Abstract:
    A method of treating resonance captures for few energy group calculations is developed using the Narrow Resonance-Infinite Absorber approximation to the resonance integral. The application of this method is not restricted to this approximation, however, as other approximations to the resonance integral could also be used. The approach presented defines...
    Resource Type:
    Masters Thesis
    Full Text:
    . However, the form obtained here will be sufficient for the present, as Doppler broadening may be