Nuclear scoping analysis of ITER bioshield top lid toward its preliminary design review

P. Martínez-Albertos; P. Sauvan; J. Bergman; M. Loughlin; Y. Le Tonqueze; M. Thompson; R. Juárez

doi:10.1016/j.fusengdes.2023.113960

Nuclear scoping analysis of ITER bioshield top lid toward its preliminary design review

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

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

During ITER operations, electronics located in the crane hall, which is above the tokamak, will be exposed to neutron and photon fields from both the plasma and the activated water. To protect the electronics, the implementation of dedicated shielding on the crane hall platform and the bioshield top lid is required. The design demands optimisation attending to constructability, weight limits, and radiation shielding requirements. This work evaluates eight shielding configurations by assessment of the neutron flux and dose accumulated over 4700 h of operation at 500 MW for electronics protection. This corresponds to a neutron wall load of 0.3 MW a/m² as specified in the ITER Project Specification. An intermediate-source approach has been followed with SRC-UNED, considering all relevant radiation sources while minimising the computational time required. Results were presented at the top lid Conceptual Design Review aiming to support decision-making. Further optimisation has since been performed to reach a top lid proposal for its Preliminary Design Review. All outcomes show that radiation levels above the north and south crane hall platforms are compatible with the critical electronics requirements.

Original language	English
Article number	113960
Journal	Fusion Engineering and Design
Volume	195
DOIs	https://doi.org/10.1016/j.fusengdes.2023.113960
State	Published - Oct 2023
Externally published	Yes

Funding

This work has been carried out partially 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 author(s) 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 2023-ETSII-UNED-03; and UNED for the funding of the predoctoral contracts (FPI) and of the open access publishing.

Keywords

Electronics
ITER
Radiation transport
Shielding

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.fusengdes.2023.113960

Cite this

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title = "Nuclear scoping analysis of ITER bioshield top lid toward its preliminary design review",

abstract = "During ITER operations, electronics located in the crane hall, which is above the tokamak, will be exposed to neutron and photon fields from both the plasma and the activated water. To protect the electronics, the implementation of dedicated shielding on the crane hall platform and the bioshield top lid is required. The design demands optimisation attending to constructability, weight limits, and radiation shielding requirements. This work evaluates eight shielding configurations by assessment of the neutron flux and dose accumulated over 4700 h of operation at 500 MW for electronics protection. This corresponds to a neutron wall load of 0.3 MW a/m² as specified in the ITER Project Specification. An intermediate-source approach has been followed with SRC-UNED, considering all relevant radiation sources while minimising the computational time required. Results were presented at the top lid Conceptual Design Review aiming to support decision-making. Further optimisation has since been performed to reach a top lid proposal for its Preliminary Design Review. All outcomes show that radiation levels above the north and south crane hall platforms are compatible with the critical electronics requirements.",

keywords = "Electronics, ITER, Radiation transport, Shielding",

author = "P. Mart{\'i}nez-Albertos and P. Sauvan and J. Bergman and M. Loughlin and {Le Tonqueze}, Y. and M. Thompson and R. Ju{\'a}rez",

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year = "2023",

month = oct,

doi = "10.1016/j.fusengdes.2023.113960",

language = "English",

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AU - Martínez-Albertos, P.

AU - Sauvan, P.

AU - Bergman, J.

AU - Loughlin, M.

AU - Le Tonqueze, Y.

AU - Thompson, M.

AU - Juárez, R.

PY - 2023/10

Y1 - 2023/10

N2 - During ITER operations, electronics located in the crane hall, which is above the tokamak, will be exposed to neutron and photon fields from both the plasma and the activated water. To protect the electronics, the implementation of dedicated shielding on the crane hall platform and the bioshield top lid is required. The design demands optimisation attending to constructability, weight limits, and radiation shielding requirements. This work evaluates eight shielding configurations by assessment of the neutron flux and dose accumulated over 4700 h of operation at 500 MW for electronics protection. This corresponds to a neutron wall load of 0.3 MW a/m² as specified in the ITER Project Specification. An intermediate-source approach has been followed with SRC-UNED, considering all relevant radiation sources while minimising the computational time required. Results were presented at the top lid Conceptual Design Review aiming to support decision-making. Further optimisation has since been performed to reach a top lid proposal for its Preliminary Design Review. All outcomes show that radiation levels above the north and south crane hall platforms are compatible with the critical electronics requirements.

AB - During ITER operations, electronics located in the crane hall, which is above the tokamak, will be exposed to neutron and photon fields from both the plasma and the activated water. To protect the electronics, the implementation of dedicated shielding on the crane hall platform and the bioshield top lid is required. The design demands optimisation attending to constructability, weight limits, and radiation shielding requirements. This work evaluates eight shielding configurations by assessment of the neutron flux and dose accumulated over 4700 h of operation at 500 MW for electronics protection. This corresponds to a neutron wall load of 0.3 MW a/m² as specified in the ITER Project Specification. An intermediate-source approach has been followed with SRC-UNED, considering all relevant radiation sources while minimising the computational time required. Results were presented at the top lid Conceptual Design Review aiming to support decision-making. Further optimisation has since been performed to reach a top lid proposal for its Preliminary Design Review. All outcomes show that radiation levels above the north and south crane hall platforms are compatible with the critical electronics requirements.

KW - Electronics

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KW - Radiation transport

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Nuclear scoping analysis of ITER bioshield top lid toward its preliminary design review

Abstract

Funding

Keywords

UN SDGs

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