Title: THE LONGITUDINAL DISTRIBUTION OF THERMAL NEUTRON FLUX IN CYLINDRICAL FUEL SPECIMENS DURING IRRADIATION
Abstract: among which are the variation of heat production throughout the sample (due to local neutron-flux perturbations) and the variation of thermal conductivity occasioned by unusually steep temperature gradients. Various assumptions, which are considered to fit most closely the conditions at hand, are made for these calculations. As no standard set of assumptions can fit all cases, four illustrative cases are presented, representing four different sets of conditions applied to the heatconduction equation. The four cases considered may be briefly described as follows: varlable thermal conductivity, nonuniform heat production; variable thermal conductivity, uniform heat production; constant thermal conductivity, nonuniform heat production; and constant thermal conductivity, uniform heat production. (auth)