scholarly journals Effect of Gamma-Ray Energy on Image Quality in Passive Gamma Emission Tomography of Spent Nuclear Fuel

2019 ◽  
Vol 66 (1) ◽  
pp. 487-496
Author(s):  
Camille Belanger-Champagne ◽  
Pauli Peura ◽  
Paula Eerola ◽  
Tapani Honkamaa ◽  
Timothy White ◽  
...  
Keyword(s):  
Image Quality ◽  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Gamma Ray ◽  
Emission Tomography ◽  
Gamma Emission

scholarly journals Bayesian Activity Estimation and Uncertainty Quantification of Spent Nuclear Fuel Using Passive Gamma Emission Tomography

2021 ◽  
Vol 7 (10) ◽  
pp. 212
Author(s):  
Ahmed Karam Eldaly ◽  
Ming Fang ◽  
Angela Di Fulvio ◽  
Stephen McLaughlin ◽  
Mike E. Davies ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Linear Models ◽  
Spent Nuclear Fuel ◽  
Emission Tomography ◽  
Superior Performance ◽  
Model Parameters ◽  
Gamma Emission ◽  
Unknown Parameters ◽  
Noise Models ◽  
Activity Estimation

In this paper, we address the problem of activity estimation in passive gamma emission tomography (PGET) of spent nuclear fuel. Two different noise models are considered and compared, namely, the isotropic Gaussian and the Poisson noise models. The problem is formulated within a Bayesian framework as a linear inverse problem and prior distributions are assigned to the unknown model parameters. In particular, a Bernoulli-truncated Gaussian prior model is considered to promote sparse pin configurations. A Markov chain Monte Carlo (MCMC) method, based on a split and augmented Gibbs sampler, is then used to sample the posterior distribution of the unknown parameters. The proposed algorithm is first validated by simulations conducted using synthetic data, generated using the nominal models. We then consider more realistic data simulated using a bespoke simulator, whose forward model is non-linear and not available analytically. In that case, the linear models used are mis-specified and we analyse their robustness for activity estimation. The results demonstrate superior performance of the proposed approach in estimating the pin activities in different assembly patterns, in addition to being able to quantify their uncertainty measures, in comparison with existing methods.

Gamma Emission Tomography for the Inspection of Spent Nuclear Fuel

2017 ◽  
Author(s):  
Mikhail Mayorov ◽  
Timothy White ◽  
Alain Lebrun ◽  
Joerg Brutscher ◽  
Jens Keubler ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Emission Tomography ◽  
Gamma Emission

scholarly journals Simultaneous reconstruction of emission and attenuation in passive gamma emission tomography of spent nuclear fuel

2020 ◽  
Vol 14 (2) ◽  
pp. 317-337 ◽  
Author(s):  
Rasmus Backholm ◽  
◽  
Tatiana A. Bubba ◽  
Samuli Siltanen ◽  
Camille Bélanger-Champagne ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Emission Tomography ◽  
Gamma Emission ◽  
Simultaneous Reconstruction

scholarly journals Gamma-Ray Mirrors for Non-Destructive Assay (NDA) of Spent Nuclear Fuel (SNF)

2014 ◽  
Author(s):  
Klaus Ziock ◽  
Michael Pivovaroff ◽  
Arden Dougan
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Gamma Ray ◽  
Non Destructive

scholarly journals Gamma-ray mirrors for direct measurement of spent nuclear fuel

2014 ◽  
Vol 743 ◽  
pp. 109-113 ◽  
Author(s):  
Michael J. Pivovaroff ◽  
Klaus P. Ziock ◽  
Monica Fernandez-Perea ◽  
Mark J. Harrison ◽  
Regina Soufli
Keyword(s):  
Nuclear Fuel ◽  
Direct Measurement ◽  
Spent Nuclear Fuel ◽  
Gamma Ray

Gamma-Ray Spectroscopy Measurements of Decay Heat in Spent Nuclear Fuel

2002 ◽  
Vol 141 (2) ◽  
pp. 129-139 ◽  
Author(s):  
P. Jansson ◽  
A. Håkansson ◽  
A. Bäcklin ◽  
S. Jacobsson
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Gamma Ray ◽  
Decay Heat ◽  
Gamma Ray Spectroscopy

scholarly journals Idea of an experimental technique for quantitative passive gamma emission tomography on irradiated nuclear fuel assemblies

2021 ◽  
Vol 7 ◽  
Author(s):  
Peter Jansson
Keyword(s):  
Image Reconstruction ◽  
Nuclear Fuel ◽  
Experimental Technique ◽  
Quantitative Information ◽  
Emission Tomography ◽  
Gamma Emission ◽  
Fuel Rods ◽  
Activity Distribution ◽  
Fuel Assemblies ◽  
Irradiated Nuclear Fuel

An idea is presented in which passive gamma emission tomography of irradiated nuclear fuel is developed to enable quantitative information of the spatial activity distribution of selected isotopes within the fuel rods of the assembly. The idea is based on using well-known calibration sources mounted in the measurement device during measurement. The image reconstruction would include the sources, thereby enable quantification of the activity distribution. Should the idea be proven viable, the outcome would be valuable to the global community dealing with characterisation of nuclear fuel in terms of safety, security, safeguards and fuel development.

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