Effect of Pu-Rich Agglomerate in MOX Fuel on a Lattice Calculation

Autor:	Masakazu Namekawa, Toru Yamamoto, Katsuyuki Kawashima
Rok vydání:	2007
Předmět:	Nuclear and High Energy Physics Nuclear fuel Chemistry Nuclear engineering Radiochemistry Nuclear reactor law.invention chemistry.chemical_compound Nuclear Energy and Engineering Agglomerate law Volume fraction Uranium oxide MOX fuel Burnup Power density
Zdroj:	Journal of Nuclear Science and Technology. 44:1259-1267
ISSN:	1881-1248 0022-3131
Popis:	The effect of Pu-rich agglomerates in U-Pu mixed oxide (MOX) fuel on a lattice calculation has been demonstrated. The Pu-rich agglomerate parameters are defined based on the measurement data of MIMAS-MOX and the focus is on the highly enriched MOX fuel in accordance with increased burnup resulting in a higher volume fraction of the Pu-rich agglomerates. The lattice calculations with a heterogeneous fuel model and a homogeneous fuel model are performed simulating the PWR 17 × 17 fuel assembly. The heterogeneous model individually treats the Pu-rich agglomerate and U-Pu matrix, whereas the homogeneous model homogenizes the compositions within the fuel pellet. A continuous-energy Monte Carlo burnup code, MVP-BURN, is used for burnup calculations up to 70 GWd/t. A statistical geometry model is applied in modeling a large number of Pu-rich agglomerates assuming that they are distributed randomly within the MOX fuel pellet. The calculated nuclear characteristics include k-inf, Pu isotopic compositions, power de...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c99447086e2a6206820910abe461680 https://doi.org/10.1080/18811248.2007.9711369 Zobrazit plný text záznamu