Linear Response of the Neutron Field to a Propagating Perturbation of Moderator Density (Two-Group Theory of Boiling Water Reactor Noise)
- 1 December 1979
- journal article
- research article
- Published by Taylor & Francis in Nuclear Science and Engineering
- Vol. 72 (3) , 304-321
- https://doi.org/10.13182/nse79-a20387
Abstract
According to recent investigations, the neutron noise field in a boiling water reactor can be separated into a local and a global component. In the present paper, these two components are discussed further via two-group diffusion theory. The expediency of the local-global concept is compared to another concept based on separating components corresponding to the two roots of the dynamic eigenvalue problem. The mathematical discussion of the neutron response to a propagating perturbation of the moderator density is given. Point reactor behavior and “linear-phase behavior” appear as two extremes of the neutron response. The mathematical results are illustrated numerically for the cases of a large power reactor core and a small highly enriched core.Keywords
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