Linear response of the neutron field to a propagating perturbation of moderator density (two-group theory of boiling water reactor noise)

Journal Article · Sat Dec 01 04:00:00 EST 1979 · Nucl. Sci. Eng.; (United States)

OSTI ID:5476594

Behringer, K ^[1]; Kosaly, G; Pazsit, I

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1. Swiss Federal Inst. for Reactor Research, Wurlingen

According to recent investigations the neutron noise field in a boiling water reactor can be separated into a local and a global component. 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.

• OSTI ID: 5476594
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 72:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
BWR TYPE REACTORS
DENSITY
DISTURBANCES
HYDROGEN COMPOUNDS
MODERATORS
MULTIGROUP THEORY
NEUTRON FLUX
NEUTRON TRANSPORT THEORY
NUMERICAL SOLUTION
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATION FLUX
REACTOR NOISE
REACTORS
TRANSPORT THEORY
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS