[en] Radiation-induced thermally stimulated currents (TSC) in finger nail was investigated as a possible method of estimating doses received by people not wearing dosemeters and accidentally exposed to ionizing radiations. From experiments on nail clipping samples it was concluded that although charge carrier traps are present in nail which can be both filled by X-ray-produced carriers during simultaneous application of a bias voltage (radioelectret formation) and also emptied by X-rays when short-circuited (thermoelectret depolarisation), the dark current increases so rapidly with temperature as to mask any radiation-induced TSC produced when heating with a bias voltage. (author)