Assessment of ITER radiation environment during the remote-handling operation of In-Vessel components with D1SUNED

P. Martínez-Albertos, P. Sauvan, M. J. Loughlin, Y. Le Tonqueze, R. Juárez

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Abstract

During ITER operational life, a remote-handled cask will be used to transfer In-Vessel components to the Hot Cell for maintenance, storage and decommissioning purposes. Due to the distribution of penetrations for system allocation in the facility, the radiation field of each transfer operation presents a high spatial variability; all operations must be studied independently for workers and electronics protection. In this paper, we present a fully representative approach to describe the radiation environment during the complete remote-handling scenario of In-Vessel components in the ITER facility. The impact of all relevant radiation sources during different stages of the operation is addressed. As-built structures and 2020 baseline designs are considered to produce the most detailed neutronics model of the Tokamak Complex, the 400,000-tonne civil structure hosting the tokamak, up to date. Novel capabilities of the D1SUNED code have allowed to compute the integral dose, the dose rate and the photon-induced neutron flux of both moving and static radiation sources. Time bins are included in the simulations to compute the dose rate caused by In-Vessel components at all positions along the transfer. The time evolution of the dose rate is built in video format with a 1-m resolution, especially valuable for hot-spots identification.

Original languageEnglish
Article number3544
JournalScientific Reports
Volume13
Issue number1
DOIs
StatePublished - Dec 2023

Funding

This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. This work has been performed under the ITER contract IO/20/CT/6000000345 between UNED and ITER Organization. We appreciate the support given by: MINECO for the funding of Juan de la Cierva-incorporación program 2016; and the funding under I+D+i-Retos Investigación, Prj. ENE2015-70733R; Comunidad de Madrid under I+D en Tecnologías, Prj. TECHNOFUSIÓN (III)-CM, S2018/EMT-4437; Escuela Técnica Superior de Ingenieros Industriales (UNED) of Spain, project 2022-ETSII-UNED-14; and UNED for the funding of the predoctoral contracts (FPI). This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. This work has been performed under the ITER contract IO/20/CT/6000000345 between UNED and ITER Organization. We appreciate the support given by: MINECO for the funding of Juan de la Cierva-incorporación program 2016; and the funding under I+D+i-Retos Investigación, Prj. ENE2015-70733R; Comunidad de Madrid under I+D en Tecnologías, Prj. TECHNOFUSIÓN (III)-CM, S2018/EMT-4437; Escuela Técnica Superior de Ingenieros Industriales (UNED) of Spain, project 2022-ETSII-UNED-14; and UNED for the funding of the predoctoral contracts (FPI). The views expressed in this publication are the sole responsibility of the authors and do not necessarily reflect the views of the ITER Organization. Neither this institution nor any person acting on its behalf is responsible for the use that might have been made of information in this publication. The content of this paper does not commit the ITER Organization to being a nuclear operator.

FundersFunder number
I+D en TecnologíasS2018/EMT-4437, 2022-ETSII-UNED-14
Comunidad de Madrid
Euratom Research and Training Programme101052200 — EUROfusion, IO/20/CT/6000000345
European Commission
Ministerio de Economía y CompetitividadENE2015-70733R

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