Category Archives: Frequency Response Testing. in Nuclear Reactors

Pseudo-Random Ternary Sequence (PRTS)t

The main reason for interest in the PRTS for frequency response measure­ments is that the signal discriminates against nonlinear effects (it is anti­symmetric). Because several binary signals also have this property, they are preferred over the PRTS for future applications since the practical problems of inputting a three-level signal into a system are often significantly greater than problems with a […]

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Numerical Integration Procedures in Computing the DFTt

Because of the characteristics of digitizing equipment, the samples in a digitized data record are generally evenly spaced. Numerical integration procedures based on evenly spaced data are called Newton-Coates methods. A number of different Newton-Coates methods are available, and the effect of the choice of an integration method on the quality of the results should be examined.

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Spatial Effects

The simplest space-dependent neutron kinetics model uses the mono­energetic diffusion equation where D is the diffusion coefficient, ф the neutron flux, the macroscopic absorption cross section, Ly the macroscopic fission cross section, v the number of neutrons produced per fission, and v the average neutron velocity. Energy dependence of the neutron flux and the detection process can be handled using […]

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