Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies
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 w...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2015/757201 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849396779115610112 |
|---|---|
| author | Andrius Slavickas Raimondas Pabarčius Aurimas Tonkūnas Gediminas Stankūnas Eugenijus Ušpuras |
| author_facet | Andrius Slavickas Raimondas Pabarčius Aurimas Tonkūnas Gediminas Stankūnas Eugenijus Ušpuras |
| author_sort | Andrius Slavickas |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-ac0d44748f2e4332ab4cae43ed98fb8e |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-ac0d44748f2e4332ab4cae43ed98fb8e2025-08-20T03:39:14ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832015-01-01201510.1155/2015/757201757201Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR AssembliesAndrius Slavickas0Raimondas Pabarčius1Aurimas Tonkūnas2Gediminas Stankūnas3Eugenijus Ušpuras4Lithuanian Energy Institute, Breslaujos Straße 3, 44403 Kaunas, LithuaniaLithuanian Energy Institute, Breslaujos Straße 3, 44403 Kaunas, LithuaniaLithuanian Energy Institute, Breslaujos Straße 3, 44403 Kaunas, LithuaniaLithuanian Energy Institute, Breslaujos Straße 3, 44403 Kaunas, LithuaniaLithuanian Energy Institute, Breslaujos Straße 3, 44403 Kaunas, LithuaniaThe 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.http://dx.doi.org/10.1155/2015/757201 |
| spellingShingle | Andrius Slavickas Raimondas Pabarčius Aurimas Tonkūnas Gediminas Stankūnas Eugenijus Ušpuras Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies Science and Technology of Nuclear Installations |
| title | Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies |
| title_full | Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies |
| title_fullStr | Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies |
| title_full_unstemmed | Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies |
| title_short | Void Reactivity Coefficient Analysis during Void Fraction Changes in Innovative BWR Assemblies |
| title_sort | void reactivity coefficient analysis during void fraction changes in innovative bwr assemblies |
| url | http://dx.doi.org/10.1155/2015/757201 |
| work_keys_str_mv | AT andriusslavickas voidreactivitycoefficientanalysisduringvoidfractionchangesininnovativebwrassemblies AT raimondaspabarcius voidreactivitycoefficientanalysisduringvoidfractionchangesininnovativebwrassemblies AT aurimastonkunas voidreactivitycoefficientanalysisduringvoidfractionchangesininnovativebwrassemblies AT gediminasstankunas voidreactivitycoefficientanalysisduringvoidfractionchangesininnovativebwrassemblies AT eugenijususpuras voidreactivitycoefficientanalysisduringvoidfractionchangesininnovativebwrassemblies |