Verifying nuclear fuel assemblies in wet storages on a partial defect level: A software simulation tool for evaluating the capabilities of the Digital Cherenkov Viewing Device

Grape, Sophie; Svärd, Staffan Jacobsson; Lindberg, Bo

doi:10.1016/j.nima.2012.09.048

Cited by 5 publications

(7 citation statements)

References 4 publications

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“…Accordingly, a larger angle of 3 degrees was used in this work, which was wider but still considered narrow enough to provide a reasonable representation of the vertical light component. This also allow comparisons with previous results [10] using the same angle.…”

Section: Assumptions and Limitations Of This Studymentioning

confidence: 64%

“…The choice of 3 degrees is arbitrary, though it is narrow enough to represent the vertical light component, yet wide enough that sufficient statistics can be gathered in the simulations in reasonable time. It also allow for comparisons with earlier works, where the same angle was used [10].…”

Section: Simulated Geometrymentioning

confidence: 99%

“…The simulation toolkit used in this work is based on the Geant4 (version 4.10.00) Monte-Carlo simulation package [15], and it is a development of a previously presented simulation toolkit for estimation of Cherenkov-light production in nuclear fuel assemblies [10]. The physical processes of interest are included through a Geant4 standard physics list (QSGP_BERT_HP), with optical photon physics (G4OpticalPhysics) added to enable simulation of the Cherenkov light production.…”

Section: Description Of the Simulation Software Used In This Workmentioning

confidence: 99%

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On Cherenkov light production by irradiated nuclear fuel rods

et al. 2017

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Safeguards verification of irradiated nuclear fuel assemblies in wet storage is frequently done by measuring the Cherenkov light in the surrounding water produced due to radioactive decays of fission products in the fuel. This paper accounts for the physical processes behind the Cherenkov light production caused by a single fuel rod in wet storage, and simulations are presented that investigate to what extent various properties of the rod affect the Cherenkov light production. The results show that the fuel properties has a noticeable effect on the Cherenkov light production, and thus that the prediction models for Cherenkov light production which are used in the safeguards verifications could potentially be improved by considering these properties.It is concluded that the dominating source of the Cherenkov light is gamma-ray interactions with electrons in the surrounding water. Electrons created from beta decay may also exit the fuel and produce Cherenkov light, and e.g. Y-90 was identified as a possible contributor to significant levels of the measurable Cherenkov light in long-cooled fuel. The results also show that the cylindrical, elongated fuel rod geometry results in a non-isotropic Cherenkov light production, and the light component parallel to the rod's axis exhibits a dependence on gamma-ray energy that differs from the total intensity, which is of importance since the typical safeguards measurement situation observes the vertical light component. It is also concluded that the radial distributions of the radiation sources in a fuel rod will affect the Cherenkov light production.

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Section: Assumptions and Limitations Of This Studymentioning

confidence: 64%

Section: Simulated Geometrymentioning

confidence: 99%

Section: Description Of the Simulation Software Used In This Workmentioning

confidence: 99%

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On Cherenkov light production by irradiated nuclear fuel rods

et al. 2017

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“…The simulation code used for the second step is a further development of the code package used in [3], which in turn is based on the code package described in [9]. Following the methodology used in [10] and [3], the ionising radiation is simulated to be emitted from inside the fuel material, and the simulations keep track of the radiation interactions and subsequent production of Cherenkov light.…”

Section: Monte-carlo Particle Transportmentioning

confidence: 99%

On the inclusion of light transport in prediction tools for Cherenkov light intensity assessment of irradiated nuclear fuel assemblies

et al. 2019

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“…Furthermore, the only neutron data available at this time was measured with a Fork detector by Euratom. (2) A Digital Cerenkov Viewing Device (DCVD) [29] [30], which measures the intensity and patterns of the Cerenkov light emitted from the water within the assembly, will also be deployed. Signatures from the DCVD measurement may be used in future analysis.…”

Section: Non-destructive Assay Techniquesmentioning

confidence: 99%