publication . Article . 2020

Numerical solution of two-energy-group neutron noise diffusion problems with fine spatial meshes

Christophe Demaziere; Paolo Vinai; Antonios Mylonakis;
Open Access English
  • Published: 01 Jun 2020
Abstract
The paper presents the development of a strategy for the fine-mesh full-core computation of neutron noise in nuclear reactors. Reactor neutron noise is related to fluctuations of the neutron flux induced by stationary perturbations of the properties of the system. Its monitoring and analysis can provide useful insights in the reactor operations. The model used in the work relies on the neutron diffusion approximation and requires the solution of both the criticality (eigenvalue) and neutron noise equations. A high-resolution spatial discretization of the equations is important for an accurate evaluation of the neutron noise because of the strong gradients that m...
Subjects
free text keywords: reactor neutron noise, k-eigenvalue problem, GMRES, nonlinear acceleration, JFNK, SPAI, Nuclear Energy and Engineering, Linear system, Generalized minimal residual method, System of linear equations, Discretization, Mechanics, Physics, Neutron flux, Numerical analysis, Nuclear reactor, law.invention, law, Nuclear reactor core
Related Organizations
Funded by
EC| CORTEX
Project
CORTEX
Core monitoring techniques and experimental validation and demonstration
  • Funder: European Commission (EC)
  • Project Code: 754316
  • Funding stream: H2020 | RIA
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