A Variable Point Kernel Dosimetry Method for Virtual Reality Simulation Applications in Nuclear Safeguards and Security

Caracena, Teófilo Moltó; Gonçalves, José; Puppa, Paolo; Vidal, Eduardo Vendrell

doi:10.1109/tns.2013.2279411

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…It has been previously demonstrated that radiation sources in real-world nuclear environments may be distributed or highly collimated; however, the use of only point sources greatly reduces computational overhead and is a common assumption in nuclear inspection. Users who wish to include diffuse nonpoint sources can approximate this through the use of many point sources in close proximity, a common approach in more sophisticated simulation suites [54][55][56]. As this implementation is computationally lightweight the use of many sources is possible.…”

Section: Limitations Of Current Implementation Of Radiationmentioning

confidence: 99%

“…The exclusion of scattering and reflections, reported in real-world nuclear environments [39,57], is also an attempt to reduce computational requirements. To include true nonpoint sources, and more importantly scattering phenomena, typically requires the need for full Monte Carlo radiation transport modelling [58], therefore ionising radiation simulations will commonly exclude this functionality to increase speed [54,55]. Despite ongoing research into ray-tracing and light transport simulations [59], they often rely on computational acceleration with dedicated graphics processing for real-time use.…”

Section: Limitations Of Current Implementation Of Radiationmentioning

confidence: 99%

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Simulating Ionising Radiation in Gazebo for Robotic Nuclear Inspection Challenges

et al. 2021

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The utilisation of robots in hazardous nuclear environments has potential to reduce risk to humans. However, historical use has been largely limited to specific missions rather than broader industry-wide adoption. Testing and verification of robotics in realistic scenarios is key to gaining stakeholder confidence but hindered by limited access to facilities that contain radioactive materials. Simulations offer an alternative to testing with actual radioactive sources, provided they can readily describe the behaviour of robotic systems and ionising radiation within the same environment. This work presents a quick and easy way to generate simulated but realistic deployment scenarios and environments which include ionising radiation, developed to work within the popular robot operating system compatible Gazebo physics simulator. Generated environments can be evolved over time, randomly or user-defined, to simulate the effects of degradation, corrosion or to alter features of certain objects. Interaction of gamma radiation sources within the environment, as well as the response of simulated detectors attached to mobile robots, is verified against the MCNP6 Monte Carlo radiation transport code. The benefits these tools provide are highlighted by inclusion of three real-world nuclear sector environments, providing the robotics community with opportunities to assess the capabilities of robotic systems and autonomous functionalities.

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Section: Limitations Of Current Implementation Of Radiationmentioning

confidence: 99%

Section: Limitations Of Current Implementation Of Radiationmentioning

confidence: 99%

Simulating Ionising Radiation in Gazebo for Robotic Nuclear Inspection Challenges

et al. 2021

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“…VR technology has also been utilized for real-time simulation applications in nuclear safeguards and security, and an algorithm with the capability of fulfilling time and precision requirements was built by calculating dose rates via a nonregular mesh model (Caracena et al 2013). The algorithm has also been optimized with a KD-tree based method for fast radiation source representation (Caracena et al 2017), although geometries considered are limited to parallelepipeds.…”

Section: Introductionmentioning

confidence: 99%

Virtual reality-based adaptive dose assessment method for arbitrary geometries in nuclear facility decommissioning

Liu¹,

Chao²,

Xia³

et al. 2018

J. Radiol. Prot.

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This paper presents an improved and efficient virtual reality-based adaptive dose assessment method (VRBAM) applicable to the cutting and dismantling tasks in nuclear facility decommissioning. The method combines the modeling strength of virtual reality with the flexibility of adaptive technology. The initial geometry is designed using three-dimensional computer-aided design tools, and a hybrid model composed of cuboids and a point-cloud is generated automatically according to the virtual model of the object. In order to improve the efficiency of dose calculation while retaining accuracy, the hybrid model is converted to a weighted point-cloud model, and the point kernels are generated by adaptively simplifying the weighted point-cloud model according to the detector position, an approach that is suitable for arbitrary geometries. The dose rates are calculated using the point kernel method. To account for radiation scattering effects, buildup factors are calculated using the geometric progression formula in the fitting function. The geometric modeling capability of VRBAM was verified by simulating basic geometries, which included a convex surface, a concave surface, a flat surface and their combination. The simulation results show that the VRBAM is more flexible and superior to other approaches in modeling complex geometries. In this paper, the computation time and dose rate results obtained from the proposed method were also compared with those obtained using the MCNP code and an earlier virtual reality-based method developed by the same authors.

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“…This application aims also at training but in this case of future nuclear inspectors which need to learn the basics of camera installations and has recently passed the demo phase and has been tested with real trainees [32]. Also not forgetting the work associated to this thesis, simulation of radiation detectors in efficient ways to optimise its implementation on VR applications [33] has been a very active issue recently.…”

Section: Vr Applied To Nuclear Safeguards and Securitymentioning

confidence: 99%

Simulation of Portable Gamma Radiation Detectors for Virtual Reality based Training applications.

Caracena¹

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A Variable Point Kernel Dosimetry Method for Virtual Reality Simulation Applications in Nuclear Safeguards and Security

Abstract: Moltó Caracena, T.; Gonçalves, JGM.; Peerani, P.; Vendrell Vidal, E. (2013). A variable point kernel dosimetry method for virtual reality simulation applications in nuclear safeguards and security.

Cited by 9 publications

References 12 publications

Simulating Ionising Radiation in Gazebo for Robotic Nuclear Inspection Challenges

Simulating Ionising Radiation in Gazebo for Robotic Nuclear Inspection Challenges

Virtual reality-based adaptive dose assessment method for arbitrary geometries in nuclear facility decommissioning

Simulation of Portable Gamma Radiation Detectors for Virtual Reality based Training applications.

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