反应堆铝合金样品中63Ni的测量技术研究

为建立反应堆铝合金样品中⁶³Ni活度测量的方法，在前期确定了样品前处理流程的基础上，进行了全程化学回收率实验、去污实验、镍载体量对测量效率的影响及空白实验等方面工作。全程化学回收率在70%以上，对各种杂质离子的去污因子均为10²及以上，镍载体的加入量选为5 mg。该方法对DPM（放射性核素每分钟衰变数）的标准偏差为6.29，相对标准偏差为15.9%，检出限为1.38 Bq/g，已应用于反应堆退役样品的分析测量。

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.