Naslov
Xenon Correction in Homogenized Neutron Cross Sections

Autori
Grgić, Davor ; Ječmenica, Radomir ; Pevec, Dubravko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 20th International Conference on Nuclear Engineering ICONE20 / - , 2012

Skup
20th International Conference on Nuclear Engineering ICONE20

Mjesto i datum
Anaheim (CA), Sjedinjene Američke Države, 30.07.2012. - 03.08.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
spectral history effect; Xe and Sm concentrations; homogenized cross sections; lattice codes; axial offset

Sažetak
Selected IFBA and non-IFBA NPP Krsko fuel assemblies using 2D lattice codes (DRAGON, NEWT and FA2D) to show quantitative influence of xenon concentration on homogenized cross sections. In addition to usual influence on fast and, to larger extent, on thermal absorption cross sections, similar type of influence is found in case of fission cross sections, and to some extent in fast to thermal removal cross section. Based on relative change of cross sections from the values obtained during reference depletion, burnup and power level dependent correction values were calculated and included in separate cross section library. Limited dependence of correction values on IFBA presence and enrichment is found. When applied within nodal code the correction has potential to improve prediction of multiplication factors (boron concentration) and axial power distribution in Pressurized Water Reactor (PWR) reactors.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA