Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies
Joint Authors
Slavickas, Andrius
Pabarčius, Raimondas
Tonkūnas, Aurimas
Stankūnas, Gediminas
Uspuras, Eugenijus
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-04-30
Country of Publication
Egypt
No. of Pages
8
Abstract EN
The study of the void reactivity variation in innovative BWR fuel assemblies is presented in this paper.
The innovative assemblies are loaded with high enrichment fresh UO2 and MOX fuels.
UO2 fuel enrichment is increased above existing design limitations for LWR fuels (>5%).
MOX fuel enrichment with fissile Pu content is established to achieve the same burnup level as that of high enrichment UO2 fuel.
For the numerical analysis, the TRITON functional module of SCALE 6.1 code with the 238-group ENDF/B-VI cross section data library was applied.
The investigation of the void reactivity feedback is performed in the entire 0–100% void fraction range.
Higher values of void reactivity coefficient for assembly loaded with MOX fuel are found in comparison with values for assembly loaded with UO2 fuel.
Moreover, coefficient values for MOX fuel are positive over 75% void fraction.
The variation of the void reactivity coefficient is explained by the results of the decomposition analysis based on four-factor formula and neutron absorption reactions for main isotopes.
Additionally, the impact of the moderation enhancement on the void reactivity coefficient was investigated for the innovative assembly with MOX fuel.
American Psychological Association (APA)
Slavickas, Andrius& Pabarčius, Raimondas& Tonkūnas, Aurimas& Stankūnas, Gediminas& Uspuras, Eugenijus. 2015. Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies. Science and Technology of Nuclear Installations،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1077881
Modern Language Association (MLA)
Slavickas, Andrius…[et al.]. Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies. Science and Technology of Nuclear Installations No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1077881
American Medical Association (AMA)
Slavickas, Andrius& Pabarčius, Raimondas& Tonkūnas, Aurimas& Stankūnas, Gediminas& Uspuras, Eugenijus. Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies. Science and Technology of Nuclear Installations. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1077881
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1077881