Conceptual Design of HFIR Irradiation Experiment for Material Compatibility Study on Liquid Sn Divertor∗)

Masatoshi Kondo; Bruce A. Pint; Jiheon Jun; Nick Russell; Joel Mc Duffee; Masafumi Akiyoshi; Teruya Tanaka; Naoko Oono; Junichi Miyazawa; Josina W. Geringer; Yutai Katoh; Yuji Hatano

doi:10.1585/PFR.16.2405040

Conceptual Design of HFIR Irradiation Experiment for Material Compatibility Study on Liquid Sn Divertor∗)

Masatoshi Kondo, Bruce A. Pint, Jiheon Jun, Nick Russell, Joel Mc Duffee, Masafumi Akiyoshi, Teruya Tanaka, Naoko Oono, Junichi Miyazawa, Josina W. Geringer, Yutai Katoh, Yuji Hatano

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

6 Scopus citations

Abstract

Liquid Sn is one of the promising coolants for liquid surface divertor concept of fusion reactors. However, the compatibility between liquid Sn and structural materials is an important issue that has to be addressed, because liquid Sn is extremely corrosive to steels at high temperatures. The corrosion may be mitigated when a protective Al₂O₃ layer is formed on the surface of alumina forming steels. However, the eﬀect of neutron irradiation on the integrity of protective layer is not made clear so far. Japan and US joint research project “FRONTIER” started in 2019 to investigate the material compatibility under neutron irradiation. The purpose of the present study is to develop the conceptual design of the irradiation test capsule which enables material compatibility tests for the alumina forming steels – liquid metal systems under neutron irradiation in the High Flux Isotope Reactor at Oak Ridge National Laboratory, TN, USA. The three dimensional drawing of capsule structure was then developed. The validity of the material selections for the capsule design was investigated by means of corrosion tests of SiC, Si₃N₄, Ti, and Mo in liquid Sn at 773 K for 262 hr.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Plasma and Fusion Research
Volume	16
DOIs	https://doi.org/10.1585/PFR.16.2405040
State	Published - 2021

Funding

This research is supported by Japan and US joint research project “FRONTIER”. This research was partially funded by the U.S. Department of Energ’s Oﬃce of Fusion Energy Sciences. Authors would like to acknowledge Dr. Bill Wiﬀen of ORNL for his support on FRONTIER TASK3 activity and his fruitful discussions on the liquid Sn rabbit capsule design. Authors would acknowledge Mrs. Yoshie Tamai for her technical assistance on corrosion tests in liquid Sn. Authors also would acknowledge Dr. Tada for his technical assistance on metallurgical analysis of specimens tested in liquid Sn. This research is supported by Japan and US joint research project “FRONTIER”. This research was partially funded by the U.S. Department of Energ’s Office of Fusion Energy Sciences. Authors would like to acknowledge Dr. Bill Wiffen of ORNL for his support on FRONTIER TASK3 activity and his fruitful discussions on the liquid Sn rabbit capsule design. Authors would acknowledge Mrs. Yoshie Tamai for her technical assistance on corrosion tests in liquid Sn. Authors also would acknowledge Dr. Tada for his technical assistance on metallurgical analysis of specimens tested in liquid Sn.

Keywords

compatibility
divertor
irradiation
irradiation test capsule
liquid metal

UN SDGs

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

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10.1585/PFR.16.2405040

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title = "Conceptual Design of HFIR Irradiation Experiment for Material Compatibility Study on Liquid Sn Divertor∗)",

abstract = "Liquid Sn is one of the promising coolants for liquid surface divertor concept of fusion reactors. However, the compatibility between liquid Sn and structural materials is an important issue that has to be addressed, because liquid Sn is extremely corrosive to steels at high temperatures. The corrosion may be mitigated when a protective Al2O3 layer is formed on the surface of alumina forming steels. However, the eﬀect of neutron irradiation on the integrity of protective layer is not made clear so far. Japan and US joint research project “FRONTIER” started in 2019 to investigate the material compatibility under neutron irradiation. The purpose of the present study is to develop the conceptual design of the irradiation test capsule which enables material compatibility tests for the alumina forming steels – liquid metal systems under neutron irradiation in the High Flux Isotope Reactor at Oak Ridge National Laboratory, TN, USA. The three dimensional drawing of capsule structure was then developed. The validity of the material selections for the capsule design was investigated by means of corrosion tests of SiC, Si3N4, Ti, and Mo in liquid Sn at 773 K for 262 hr.",

keywords = "compatibility, divertor, irradiation, irradiation test capsule, liquid metal",

author = "Masatoshi Kondo and Pint, {Bruce A.} and Jiheon Jun and Nick Russell and Duffee, {Joel Mc} and Masafumi Akiyoshi and Teruya Tanaka and Naoko Oono and Junichi Miyazawa and Geringer, {Josina W.} and Yutai Katoh and Yuji Hatano",

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year = "2021",

doi = "10.1585/PFR.16.2405040",

language = "English",

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AU - Jun, Jiheon

AU - Russell, Nick

AU - Duffee, Joel Mc

AU - Akiyoshi, Masafumi

AU - Tanaka, Teruya

AU - Oono, Naoko

AU - Miyazawa, Junichi

AU - Geringer, Josina W.

AU - Katoh, Yutai

AU - Hatano, Yuji

PY - 2021

Y1 - 2021

N2 - Liquid Sn is one of the promising coolants for liquid surface divertor concept of fusion reactors. However, the compatibility between liquid Sn and structural materials is an important issue that has to be addressed, because liquid Sn is extremely corrosive to steels at high temperatures. The corrosion may be mitigated when a protective Al2O3 layer is formed on the surface of alumina forming steels. However, the eﬀect of neutron irradiation on the integrity of protective layer is not made clear so far. Japan and US joint research project “FRONTIER” started in 2019 to investigate the material compatibility under neutron irradiation. The purpose of the present study is to develop the conceptual design of the irradiation test capsule which enables material compatibility tests for the alumina forming steels – liquid metal systems under neutron irradiation in the High Flux Isotope Reactor at Oak Ridge National Laboratory, TN, USA. The three dimensional drawing of capsule structure was then developed. The validity of the material selections for the capsule design was investigated by means of corrosion tests of SiC, Si3N4, Ti, and Mo in liquid Sn at 773 K for 262 hr.

AB - Liquid Sn is one of the promising coolants for liquid surface divertor concept of fusion reactors. However, the compatibility between liquid Sn and structural materials is an important issue that has to be addressed, because liquid Sn is extremely corrosive to steels at high temperatures. The corrosion may be mitigated when a protective Al2O3 layer is formed on the surface of alumina forming steels. However, the eﬀect of neutron irradiation on the integrity of protective layer is not made clear so far. Japan and US joint research project “FRONTIER” started in 2019 to investigate the material compatibility under neutron irradiation. The purpose of the present study is to develop the conceptual design of the irradiation test capsule which enables material compatibility tests for the alumina forming steels – liquid metal systems under neutron irradiation in the High Flux Isotope Reactor at Oak Ridge National Laboratory, TN, USA. The three dimensional drawing of capsule structure was then developed. The validity of the material selections for the capsule design was investigated by means of corrosion tests of SiC, Si3N4, Ti, and Mo in liquid Sn at 773 K for 262 hr.

KW - compatibility

KW - divertor

KW - irradiation

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KW - liquid metal

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JO - Plasma and Fusion Research

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ER -

Conceptual Design of HFIR Irradiation Experiment for Material Compatibility Study on Liquid Sn Divertor∗)

Abstract

Funding

Keywords

UN SDGs

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