Neutron irradiation of tungsten in hydrogen environment at HFIR

Nesrin O. Cetiner; Yuji Hatano; Joel L. McDuffee; Dan Ilas; Yutai Katoh; Josina W. Geringer; Takeshi Toyama

doi:10.1016/j.fusengdes.2022.113089

Neutron irradiation of tungsten in hydrogen environment at HFIR

Nesrin O. Cetiner, Yuji Hatano, Joel L. McDuffee, Dan Ilas, Yutai Katoh, Josina W. Geringer, Takeshi Toyama

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

Abstract

Neutron irradiation of tungsten with and without the presence of hydrogen is needed to understand the influence of hydrogen on microstructure development under fusion reactor conditions. However, there is a risk of ignition if air ingress occurs during seal welding of irradiation capsules in a pressurized hydrogen environment. Therefore, an irradiation capsule was designed that contains several disks of vanadium hydrides at a 30% hydrogen-to-metal atomic ratio. During irradiation, the hydrogen is released from the hydrides as the capsule temperature increases, so the irradiation capsule environment is mostly hydrogen when the capsule reaches its 400 °C design temperature. This paper describes the design and operating characteristics of this first-of-a-kind irradiation capsule.

Original language	English
Article number	113089
Journal	Fusion Engineering and Design
Volume	178
DOIs	https://doi.org/10.1016/j.fusengdes.2022.113089
State	Published - May 2022

Funding

This material is based on work supported by the US Department of Energy, Office of Science, the Office of Fusion Energy Sciences, and the Institute for Materials Research, Tohoku University, under contract number NFE-13-00416.

Funders	Funder number
U.S. Department of Energy
Office of Science
Fusion Energy Sciences
Institute for Materials Research, Tohoku University	NFE-13-00416

Keywords

Fusion reactors
HFIR
HFIR irradiation experiment
Hydrogen infused vanadium
Hydrogen retention
Tungsten irradiation

UN SDGs

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

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10.1016/j.fusengdes.2022.113089

Cite this

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title = "Neutron irradiation of tungsten in hydrogen environment at HFIR",

abstract = "Neutron irradiation of tungsten with and without the presence of hydrogen is needed to understand the influence of hydrogen on microstructure development under fusion reactor conditions. However, there is a risk of ignition if air ingress occurs during seal welding of irradiation capsules in a pressurized hydrogen environment. Therefore, an irradiation capsule was designed that contains several disks of vanadium hydrides at a 30% hydrogen-to-metal atomic ratio. During irradiation, the hydrogen is released from the hydrides as the capsule temperature increases, so the irradiation capsule environment is mostly hydrogen when the capsule reaches its 400 °C design temperature. This paper describes the design and operating characteristics of this first-of-a-kind irradiation capsule.",

keywords = "Fusion reactors, HFIR, HFIR irradiation experiment, Hydrogen infused vanadium, Hydrogen retention, Tungsten irradiation",

author = "Cetiner, {Nesrin O.} and Yuji Hatano and McDuffee, {Joel L.} and Dan Ilas and Yutai Katoh and Geringer, {Josina W.} and Takeshi Toyama",

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AU - Cetiner, Nesrin O.

AU - Hatano, Yuji

AU - McDuffee, Joel L.

AU - Ilas, Dan

AU - Katoh, Yutai

AU - Geringer, Josina W.

AU - Toyama, Takeshi

PY - 2022/5

Y1 - 2022/5

N2 - Neutron irradiation of tungsten with and without the presence of hydrogen is needed to understand the influence of hydrogen on microstructure development under fusion reactor conditions. However, there is a risk of ignition if air ingress occurs during seal welding of irradiation capsules in a pressurized hydrogen environment. Therefore, an irradiation capsule was designed that contains several disks of vanadium hydrides at a 30% hydrogen-to-metal atomic ratio. During irradiation, the hydrogen is released from the hydrides as the capsule temperature increases, so the irradiation capsule environment is mostly hydrogen when the capsule reaches its 400 °C design temperature. This paper describes the design and operating characteristics of this first-of-a-kind irradiation capsule.

AB - Neutron irradiation of tungsten with and without the presence of hydrogen is needed to understand the influence of hydrogen on microstructure development under fusion reactor conditions. However, there is a risk of ignition if air ingress occurs during seal welding of irradiation capsules in a pressurized hydrogen environment. Therefore, an irradiation capsule was designed that contains several disks of vanadium hydrides at a 30% hydrogen-to-metal atomic ratio. During irradiation, the hydrogen is released from the hydrides as the capsule temperature increases, so the irradiation capsule environment is mostly hydrogen when the capsule reaches its 400 °C design temperature. This paper describes the design and operating characteristics of this first-of-a-kind irradiation capsule.

KW - Fusion reactors

KW - HFIR

KW - HFIR irradiation experiment

KW - Hydrogen infused vanadium

KW - Hydrogen retention

KW - Tungsten irradiation

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Neutron irradiation of tungsten in hydrogen environment at HFIR

Abstract

Funding

Keywords

UN SDGs

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