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Challenges in the use of gross alpha and beta screening in nuclear waste characterisation and land remediation
P E Warwick1, I W Croudace1, M Jang2
1University of Southampton, National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK, UK.
Abstract:
Gross alpha & beta measurement is a widely used technique for rapid screening of radionuclide content. The study evaluated the influence of geometry, alpha & beta energy and presence of natural decay chain nuclides on the observed gross alpha & beta response. Measured calibration data were validated using Monte Carlo-based modelling. Total and calculated gross activities were compared for a range of nuclear waste fingerprints, with significant deviation observed for many of the fingerprints evaluated. For operationally-exposed materials, systematic beta biases were observed dependent on the dominant nuclide present.
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