A Design Study of the Parallel-Slit Ring Collimator for Fast Neutron Emission Tomography of Spent Fuel

Hausladen, Paul; Iyengar, Anagha; Fabris, L.; Yang, Jinan; Hu, Jianwei

doi:10.2172/1607269

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The combined challenges associated with effectively collimating neutrons, achieving sufficient resolution, maintaining sufficient efficiency for the modest neutron source strength from spent fuel, and maintaining sufficient insensitivity to the gamma-ray flux to allow meaningful neutron measurements were addressed by developing a new collimator concept termed a "parallel-slit ring collimator." The physics design of this imager was previously reported in [3][4][6][7][8]. Development of the iterative reconstruction code used to perform tomographic reconstruction, the imager response calculation used by the reconstruction code, and the results of reconstructions of simulated tomographic imaging measurements for the prototype imager design were documented in [5].…”

Section: Introductionmentioning

confidence: 99%

Initial Measurements with the Prototype Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Hausladen¹,

Montague²,

Fabris³

2021

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Section: Introductionmentioning

confidence: 99%

Initial Measurements with the Prototype Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Hausladen¹,

Montague²,

Fabris³

2021

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“…Finally, the results of tomographic reconstructions of simulated data using the calculated response to neutrons are reported. A previous report details how the design of the present parallel-slit ring collimator was selected from similar designs with different parameters (such as slit width) to maximize the signal-to-noise ratio in the measured data [4].…”

Section: Introductionmentioning

confidence: 99%

Tomographic Image Reconstruction for the Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Hausladen

Montague

Iyengar

et al. 2020

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“…After achieving the profiles by means of the collimated detector at every certain degree, a cross-sectional image can be constructed by several reconstruction algorithms. There are a number of related works in the nuclear measurement field [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Neutron tomography of two different internal structures in dry cask storage

2020

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A: Given the increasing quantity of spent nuclear fuel stored at nuclear plants across South Korea, the demand for dry storage in South Korea has been on the rise over the past few years. It is also necessary to develop a new safeguard technique that can effectively indicate internal configuration changes caused by any undeclared activities, such as diversions, misuse, or any theft of encapsulated spent nuclear fuel assemblies. Therefore, the present study proposes a passive neutron tomography method based on the result from a feasibility test via an MCNP simulation.As the first step of examination, the authors designed a new passive neutron tomography system, employing He-4 gas scintillation detectors (S670E, Arktis Radiation Detectors Ltd., Switzerland) newly developed to measure both thermal and fast neutrons simultaneously without any moderators. Monte Carlo simulations for two different cases (Case I and II) were then carried out in order to investigate the potential of the developed system. Each case was also simulated with five different variables.As for the simulations, Case I was executed under the hypothesis that some of the spent fuel assemblies would be discharged when empty space exists in the casks. Case II, the condition of which was identical to Case I except that the empty spaces in the casks are filled with dummy materials, was executed. The results of the simulations indicate that the system offers the capability to investigate the integrity of spent fuel assemblies in a cask visually. Further studies will help to find solutions to the attenuation by high-Z dummy materials and the degradation of the spatial resolution when only central assemblies are discharged from a cask.

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A Design Study of the Parallel-Slit Ring Collimator for Fast Neutron Emission Tomography of Spent Fuel

Cited by 4 publications

References 5 publications

Initial Measurements with the Prototype Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Initial Measurements with the Prototype Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Tomographic Image Reconstruction for the Parallel-Slit Ring Collimator Fast Neutron Emission Tomography System

Neutron tomography of two different internal structures in dry cask storage

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