Presented at ICNC-2003. International Conference on Nuclear Criticality Safety, Tokai-Mura, Japan, October 20-24, 2003 |
H. TOUBON1*, C. RIFFARD2, M. BATIFOL3, S. PELLETIER4
1COGEMA VELIZY, 2 rue Paul Dautier 78141 VELIZY Cedex, France
2 CEA Cadarache, 13108 St Paul-Lez-Durance Cedex, France
3 COGEMA LA HAGUE, 50444 BEAUMONT HAGUE Cedex , France
4 Canberra-Eurisys, 4 avenue des Frênes,78067 St Quentin-en-Yvelines Cedex, France
INTRODUCTION
For the last seven years, AREVA/COGEMA has been implementing the second phase of its burn-up credit
program (the incorporation of fission products). Since the early nineties, major actinides have been taken into
account in criticality analyses first for reprocessing applications, then for transport and storage of fuel assemblies
Next year (2004) COGEMA will take into account the six main fission products (Rh103, Cs133, Nd143, Sm149,
Sm152 and Gd155) that make up 50% of the anti-reactivity of all fission products. The experimental program
will soon be finished. The new burn-up credit methodology is in progress.
After a brief overview of BUC R&D program and COGEMA's application of the BUC, this paper will focus on
the new burn-up measurement for UO2 and MOX fuel assemblies. It details the measurement instrumentation
and the measurement experiments on MOX fuels performed at La Hague in January 2003.
