Analysis of Void Reactivity Coefficient for 3D BWR Assembly Model
| Autor: | Andrius Slavickas, Raimondas Pabarčius, Aurimas Tonkūnas, Eugenijus Ušpuras |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Science and Technology of Nuclear Installations, Vol 2016 (2016) |
| Druh dokumentu: | article |
| ISSN: | 1687-6075 1687-6083 |
| DOI: | 10.1155/2016/3427549 |
| Popis: | The effect of BWR fuel assembly 3D model on void reactivity coefficient (VRC) estimation is investigated. VRC values were calculated for different BWR assembly models applying deterministic T-NEWT and Monte Carlo KENO-VI functional modules of SCALE 6.1 code package. The difference between deterministic T-NEWT and Monte Carlo KENO-VI simulations is negligible (0.18 pcm/%). The influence of the assumed more detailed coolant density profile was estimated as well. VRC increases with the application of a larger number of coolant density values across fuel assembly height. It was shown that the coolant density profile described by 6 values per height could be considered sufficient from prospect of VRC estimation, as a more detailed density profile has impact below 1% on total assembly void effects. VRC values were decomposed to values for individual nodes and isotopes, since decomposition provides useful insights to describe the overall behaviour of VRC in detail. |
| Databáze: | Directory of Open Access Journals |
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