FLUX AND TEMPERATURE PEAKING EFFECTS RESULTING FROM THE USE OF SEAMED FUEL TUBES IN CP-5

摘要

The flux peaking factor resulting from the use of a seamed fuel thimble in CP-5 has been determined experi¬mentally and by diffusion theory calculations. A comparison of the two methods indicates that an underestimation of the magnitude and sharpness of the flux peak is obtained from the diffusion calculations. Based on this comparison, a con-servative calculation of the peaking effect which would result from the use of seamed fuel tubes in CP-5 indicates a max¬imum local power-peaking factor of 1.10 and a maximum fuel surface temperature 3°C above that obtained with extruded tubes for the same total reactor power and the same flow conditions.