Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Analysis of Zirconium and Nickel Based Alloys and Zirconium Oxides by Relative and Internal Monostandard Neutron Activation Analysis Methods

  • Shinde, Amol D. (Analytical Chemistry Division, Mod Labs, Bhabha Atomic Research Centre) ;
  • Acharya, Raghunath (Radiochemistry Division, Radiological Laboratories, Bhabha Atomic Research Centre) ;
  • Reddy, Annareddy V.R. (Analytical Chemistry Division, Mod Labs, Bhabha Atomic Research Centre)
  • Received : 2016.03.09
  • Accepted : 2016.09.19
  • Published : 2017.06.25
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Abstract

Background: The chemical characterization of metallic alloys and oxides is conventionally carried out by wet chemical analytical methods and/or instrumental methods. Instrumental neutron activation analysis (INAA) is capable of analyzing samples nondestructively. As a part of a chemical quality control exercise, Zircaloys 2 and 4, nimonic alloy, and zirconium oxide samples were analyzed by two INAA methods. The samples of alloys and oxides were also analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) and direct current Arc OES methods, respectively, for quality assurance purposes. The samples are important in various fields including nuclear technology. Methods: Samples were neutron irradiated using nuclear reactors, and the radioactive assay was carried out using high-resolution gamma-ray spectrometry. Major to trace mass fractions were determined using both relative and internal monostandard (IM) NAA methods as well as OES methods. Results: In the case of alloys, compositional analyses as well as concentrations of some trace elements were determined, whereas in the case of zirconium oxides, six trace elements were determined. For method validation, British Chemical Standard (BCS)-certified reference material 310/1 (a nimonic alloy) was analyzed using both relative INAA and IM-NAA methods. Conclusion: The results showed that IM-NAA and relative INAA methods can be used for nondestructive chemical quality control of alloys and oxide samples.

Keywords

References

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