Two-Group Theory of the Feynman-Alpha Method for Reactivity Measurement in ADS

Two-Group Theory of the Feynman-Alpha Method for Reactivity Measurement in ADS

The theory of the Feynman-alpha method, which is used to determine the subcritical reactivity of systems driven by an external source such as an ADS, is extended to two energy groups with the inclusion of delayed neutrons. This paper presents a full derivation of the variance to mean formula with th...

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Veröffentlicht in:Science and technology of nuclear installations 2012-01, Vol.2012 (2012), p.1-14
Hauptverfasser: Pal, Lenard, Pazsit, Imre
Format: Artikel
Sprache:eng
Schlagworte:
Derivation
Energy of formation
Energy use
Inclusions
Methods
Neutrons
Studies
Theory
Variance
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Zusammenfassung:The theory of the Feynman-alpha method, which is used to determine the subcritical reactivity of systems driven by an external source such as an ADS, is extended to two energy groups with the inclusion of delayed neutrons. This paper presents a full derivation of the variance to mean formula with the inclusion of two energy groups and delayed neutrons. The results are illustrated quantitatively and discussed in physical terms.
ISSN:1687-6075
1687-6083
1687-6083
DOI:10.1155/2012/620808