Measurement of ⁶³Ni in Aluminium Alloy Samples in Reactor

To establish a method of measuring the activity of ⁶³Ni in aluminium alloy samples in reactor, the chemical yield, the decontamination, the effect of Ni carrier on measuring efficiency and blank experiments were studied based on the previous confirmed pre-treatment of samples. The chemical yield of this method is beyond 70%. The decontamination factor is more than 10² for every impurity ion. The amount of the Ni carrier is 5 mg. The standard deviation is 6.29 and the relative standard deviation is 15.9%. The detection limit of the method is 1.38 Bq/g. The method has been applied to the retired samples of the reactor.