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 journalArticlepeer-review


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 languageEnglish
Article number113089
JournalFusion Engineering and Design
Publication statusPublished - 2022 May


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

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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