Abstract
We present a Bayesian approach to probabilistically infer vertical activity profiles within a radioactive waste drum from segmented gamma scanning (SGS) measurements. Our approach resorts to Markov chain Monte
Carlo (MCMC) sampling using the state-of-the-art Hamiltonian Monte Carlo (HMC) technique and accounts for two important sources of uncertainty: the measurement uncertainty and the uncertainty in the source distribution within the drum. In addition, our efficiency model simulates the contributions of all considered segments to each count measurement. Our approach is first demonstrated with a synthetic example, after which it is used to resolve the vertical activity distribution of 5 nuclides in a real waste package.
Details
Original language | English |
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Article number | 109803 |
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Pages (from-to) | 1-10 |
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Number of pages | 10 |
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Journal | Applied Radiation and Isotopes |
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Volume | 175 |
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DOIs | |
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Publication status | Published - 1 Sep 2021 |
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