عنوان مقاله [English]
In this paper, the effects of power changing on the activities of different irradiated foils have been studied. In HWZPR, there is not any remote control system for irradiation of different foils. On the other hand, in order to measurement the physical parameters in the reactor, it is necessary to irradiate foils in the stable power. Therefore in this work, the effects of different changes in the rector power, for example the power raising period, the delay neutron and photo neutrons effects, the error of the operator in the experiment have been studied. For this purpose, by using the fission chamber detector in the core and related electronic circuit, the change of neutron population in the duration of the experiment has been saved. For analyzing these measured results, the suitable program was written in the Matlab environment and the modified irradiation time for different foils is calculated. The measured result show that, this effects, it is considerable in long period and high power condition, for any foil with low half life.