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- W2029013695 abstract "Density Wave Oscillations in BWRs are coupled with the reactor kinetics. A new analytical, frequency-domain tool that uses the best available models and methods for modeling BWRs and analyzing their stability is described. The steady state of the core is obtained first in 3D with two-group diffusion equations and spatial expansion of the neutron fluxes in Legendre polynomials. The time-dependent neutronics equations are written in terms of flux harmonics (nodal-modal equations) for the study of “out-of-phase” instabilities. Considering separately all fuel assemblies divided into a number of axial segments, the thermal-hydraulic conservation equations are solved (drift-flux, non-equilibrium model). The thermal-hydraulics are iteratively fully coupled to the neutronics. The code takes all necessary information from plant files via an interface. The results of the steady state are used for the calculation of the transfer functions and system transfer matrices using extensively symbolic manipulation software (MATLAB). The resulting very large matrices are manipulated and inverted by special procedures developed within the MATLAB environment to obtain the reactor transfer functions that enable the study of system stability. Applications to BWRs show good agreement with measured stability data." @default.
- W2029013695 created "2016-06-24" @default.
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- W2029013695 date "2013-11-15" @default.
- W2029013695 modified "2023-09-23" @default.
- W2029013695 title "An Advanced Frequency-Domain Code for BWR Stability Analysis and Design" @default.
- W2029013695 doi "https://doi.org/10.1115/imece2013-65245" @default.
- W2029013695 hasPublicationYear "2013" @default.
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