Radiochemical Analysis of Nuclear Waste Samples
Summary
Radiochemical analysis of nuclear waste samples is indispensable for the safe management, decommissioning and disposal of radioactive materials. This discipline combines chemical separation techniques with sensitive detection methods to identify and quantify radionuclides within complex waste matrices, ranging from activated reactor components to contaminated effluents and concrete. Key steps include sample preparation, selective extraction or chromatographic separation of target isotopes, and measurement by techniques such as liquid scintillation counting or gamma spectroscopy. Activation calculations complement experimental work by predicting radionuclide inventories in irradiated materials, enabling cross-validation of analytical results. Challenges encompass handling volatile radionuclides, mitigating chemical interferences and achieving low detection limits for difficult-to-measure isotopes. Advances in resin technologies, automated chemistry and microscale separations are enhancing throughput, accuracy and reproducibility. Such analyses underpin regulatory compliance, inform repository design and support the circular use of decommissioned materials, thereby playing a global role in nuclear safety and sustainability.
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Radiochemical Analysis of Nuclear Waste Samples publication trend
The graph below shows the total number of articles in radiochemical analysis of nuclear waste samples across all publications each year (not limited to Nature Index journals).
Technical terms
Radiochemical separation: Procedures to isolate specific radionuclides from complex matrices using selective chemical reactions or resins.
Liquid scintillation counting (LSC): A detection technique for beta emitters in which radioactive decay induces scintillation light measured by photomultiplier tubes.
Activation calculation: Computational modelling of radionuclide production in materials exposed to neutron fluxes, aiding inventory prediction.
Chelating resin: A polymer bead functionalised with ligands that selectively bind metal ions, facilitating rapid separation of radionuclides.
References
- Fast separation and determination of 55Fe and 63Ni using chelating resin Chelex 100 for activated parts of nuclear reactors and nuclear forensics. Journal of Radioanalytical and Nuclear Chemistry (2024).
- Sampling, characterization, method validation, and lessons learned in analysis of highly activated stainless steel from reactor decommissioning. Journal of Radioanalytical and Nuclear Chemistry (2023).
- Optimized precipitation process for the treatment of radioactive effluents from Ni-alloy decontamination using a chemical oxidation reduction process. Frontiers in Nuclear Engineering (2024).
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