SYMPOSIA PAPER Published: 01 January 1994

Two-Dimensional Neutron and Gamma Calculations for Devices Irradiated in BR2 Reflector Positions


For two typical LWR fuel rod irradiation devices introduced into the BR2 reflector two-dimensional neutron and gamma calculations are being carried out.

In the first case a single fuel rod surrounded by several pressure tubes and by a time-variable neutron screen (He−3 gas at various pressures) is studied. The calculations are carried out in R,θ geometry, centered on the irradiated fuel rod.

In the second case a bundle of nine fuel rods in a 3×3 square lattice is irradiated. Here the calculations are performed in X,Y geometry.

The necessity is discussed of performing two-dimensional calculations for these irradiations in the BR2 reflector, to improve the modelling of the fuel behaviour.

Author Information

De Raedt, CM
SCK/CEN, MOL, Belgium
Bodart, SF
SCK/CEN, MOL, Belgium
Ponsard, BJ
SCK/CEN, MOL, Belgium
Wéber, MJ
SCK/CEN, MOL, Belgium
Maldague, T
BELGONUCLEAIRE, Brussels, Belgium
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Developed by Committee: E10
Pages: 608–617
DOI: 10.1520/STP15156S
ISBN-EB: 978-0-8031-5281-6
ISBN-13: 978-0-8031-1899-7