A dose assessment method for arbitrary geometries with virtual reality in the nuclear facilities decommissioning

2018 ◽  
Vol 144 ◽  
pp. 238-247 ◽  
Author(s):  
Nan Chao ◽  
Yong-kuo Liu ◽  
Hong Xia ◽  
Abiodun Ayodeji ◽  
Lu Bai
2018 ◽  
Vol 38 (3) ◽  
pp. 951-966 ◽  
Author(s):  
Yong-kuo Liu ◽  
Nan Chao ◽  
Hong Xia ◽  
Min-jun Peng ◽  
Abiodun Ayodeji

Author(s):  
Caroline Chabal ◽  
Vincent Perrot ◽  
Mehdi Ben Mosbah ◽  
Yves Soulabaille ◽  
Jean-Claude Thieblemont ◽  
...  

Many historic nuclear facilities have reached the end of their lifetimes and are now being decontaminated and dismantled. Our institute has been working on an innovative computing solution to simulate intervention scenarios in highly radioactive environments that humans cannot enter. Various treatment techniques can be compared and workers can be trained before operating on site. For the past 10 years, our institute has been developing a Virtual Reality tool that simulates all the key elements of a nuclear project, including the remote handling, and the accessibility of the site for humans, and the dose assessment associated. This tool allows all these parameters to be computed in a single interactive environment, allowing predefined scenarios to be verified and alternative solutions to be designed. This software is presented in the following paper; we here illustrate that it is particularly well-suited to dismantling projects. We also describe a first application of the tool to investigate radiological exposure scenarios. The advantages of this software include its user-friendliness, responsiveness, speed, and usefulness for the preparation of complex dismantling operations. The perspectives of this project include the simulation in Virtual Reality of human interventions.


2019 ◽  
Vol 186 (4) ◽  
pp. 524-529
Author(s):  
Si Young Kim

Abstract The intercomparison test is a quality assurance activity performed for internal dose assessment. In Korea, the intercomparison test on internal dose assessment was carried out for nuclear facilities in May 2018. The test involved four nuclear facilities in Korea, and seven exposure scenarios were applied. These scenarios cover the intake of 131I, a uranium mixture, 60Co and tritium under various conditions. This paper only reviews the participant results of three scenarios pertinent to the operation of nuclear power plants and adopts the statistical evaluation method, used in international intercomparison tests, to determine the significance values of the results. Although no outliers were established in the test, improvements in the internal dose assessment procedure were derived. These included the selection of intake time, selection of lung absorption type according to the chemical form and consideration of the contribution of previous intake.


Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3728
Author(s):  
Markus Wirth ◽  
Sebastian Kohl ◽  
Stefan Gradl ◽  
Rosanna Farlock ◽  
Daniel Roth ◽  
...  

Maximizing performance success in sports is about continuous learning and adaptation processes. Aside from physiological, technical and emotional performance factors, previous research focused on perceptual skills, revealing their importance for decision-making. This includes deriving relevant environmental information as a result of eye, head and body movement interaction. However, to evaluate visual exploratory activity (VEA), generally utilized laboratory settings have restrictions that disregard the representativeness of assessment environments and/or decouple coherent cognitive and motor tasks. In vivo studies, however, are costly and hard to reproduce. Furthermore, the application of elaborate methods like eye tracking are cumbersome to implement and necessitate expert knowledge to interpret results correctly. In this paper, we introduce a virtual reality-based reproducible assessment method allowing the evaluation of VEA. To give insights into perceptual-cognitive processes, an easily interpretable head movement-based metric, quantifying VEA of athletes, is investigated. Our results align with comparable in vivo experiments and consequently extend them by showing the validity of the implemented approach as well as the use of virtual reality to determine characteristics among different skill levels. The findings imply that the developed method could provide accurate assessments while improving the control, validity and interpretability, which in turn informs future research and developments.


Author(s):  
A. V. Kuzmin ◽  
A. V. Radkevich ◽  
V. P. Petrushkevich ◽  
N. D. Kuzmina

The aim of the current work is to perform a probabilistic dose assessment to quantify the relative importance of the source data uncertainties contribution towards the uncertainty estimates of collective and maximum individual doses of personnel during decommissioning of a storage facility. A probabilistic approach to the analysis of dose loads, including the analysis of sensitivity and uncertainty with respect to the input parameters of the used calculation models of dose assessment, allows to determine the most sensitive parameters, inaccuracies in the task of which lead to significant uncertainties in the estimates of dose loads on personnel and, therefore, require more accurate determination of conservative boundary values in deterministic analysis and safety justification. The calculations were performed by applying the code RESRAD-BUILD 3.50, developed by the Argonne National Laboratory of the US Department of Energy. The obtained results allow us to rank the parameters of the computational model according to the degree of their influence on the uncertainty of the final estimates of the dose loads on personnel, to develop recommendations for optimizing dose loads when performing radiation-hazardous work during nuclear facilities decommissioning.


2013 ◽  
Vol 760-762 ◽  
pp. 1212-1215
Author(s):  
Cheng Ze Liu ◽  
Yi Zhang ◽  
Bao Liang Cheng ◽  
Xiao Min Zhao ◽  
Ran Duan

Remote control systems are usually adopted in nuclear facilities inspecting activities due to radioactive environments. Analysis on requirements and structural design are made, and functional modules are described in detail. Remote control software for nuclear equipment inspection is developed with combination of OpenGL 3-dimensional graphics and virtual reality technologies. Operators may try offline simulation before sending commands to control hardware, which improves accuracy and reliability of remote control system.


2015 ◽  
Vol 78 ◽  
pp. 19-24 ◽  
Author(s):  
Márcio Henrique da Silva ◽  
André Cotelli do Espírito Santo ◽  
Eugênio Rangel Marins ◽  
Ana Paula Legey de Siqueira ◽  
Daniel Machado Mol ◽  
...  

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