Abstract: In this study, a rapid analysis method of ⁶³Ni in liquid effluents of a NPP was established by systematic investigation, using Ni specific resin as the separation and enrichment material, and low background liquid scintillation spectrometer as the measuring instrument. The recovery rate of six parallel samples was (93.2±3.6)%, and the radiochemical recovery rate was (92.1±2.8)%. The detection limit is 67.4 mBq/L, and the decontamination factors of Fe, Co, Zn and Mn are 10², 10⁴, 10² and 10⁴, respectively. The analysis period is short (less than 24 h). At the same time, the liquid effluent samples are analyzed by the established method, which proves that the method can be applied to the rapid monitoring of liquid effluents in NPP, It is found that the concentration of ⁶³Ni in liquid effluents of different types of reactors may be different.

Key words: liquid effluent, ⁶³Ni, Ni specific resin, LSC