TY - JOUR
T1 - Investigation of nuclear criticality within a powder using coupled neutronics and thermofluids
AU - Gomes, Jefferson L.M.A.
AU - Pain, Christopher C.
AU - Eaton, Matthew D.
AU - Goddard, Anthony J.H.
AU - Piggott, Matthew D.
AU - Ziver, A. Kemal
AU - de Oliveira, Cassiano R.E.
AU - Yamane, Y.
PY - 2008/11
Y1 - 2008/11
N2 - This paper investigates the dynamics of a postulated criticality in a powder used as part of fuel processing. Numerical simulations are performed in 2D and 3D geometries in which layers of MOX, UO2 and zinc stearate (acting as a moderating lubricant) powders become supercritical. The system simulated here were initialised with a step reactivity insertion of 1$, 2$ and 5$. The coupled radiation and multiphase–multicomponent simulations showed complex dynamics with an increase of powder temperature and mixing of the moderator into the MOX.
AB - This paper investigates the dynamics of a postulated criticality in a powder used as part of fuel processing. Numerical simulations are performed in 2D and 3D geometries in which layers of MOX, UO2 and zinc stearate (acting as a moderating lubricant) powders become supercritical. The system simulated here were initialised with a step reactivity insertion of 1$, 2$ and 5$. The coupled radiation and multiphase–multicomponent simulations showed complex dynamics with an increase of powder temperature and mixing of the moderator into the MOX.
U2 - 10.1016/j.anucene.2008.05.012
DO - 10.1016/j.anucene.2008.05.012
M3 - Article
SN - 0306-4549
VL - 35
SP - 2073
EP - 2092
JO - Annals of Nuclear Energy
JF - Annals of Nuclear Energy
IS - 11
ER -