Optimization of Measurement of↑(63) Ni in Reactor Waste Samples using ↑(65)Ni as a Tracer

摘要

Consistent. clean, and high chemical recovery is important for ↑(63)Ni analysis of low-level radioactive waste samples from nuclear power reactors. These samples generally contain numerous radionuclides in high concentrations which can interfere with nickel measurements. Chemical recovery of approx. 90% can be achieved consistently using an optimized procedure. The use of ↑(65)Ni as a chemical tracer was incorporated into such a procedure to provide sample-specific chemical recovery, eliminating error associated with using the average recovery value of several standards. Methods were also used to correct the contaminants of ↑(55)Fe,↑(58)Co, and↑(60)Co should they be present in separated fractions for measurement of ↑(63)Ni activity. # 1997 Elsevier Science Ltd