Abstract
This study demonstrates a novel methodology that simultaneously exposes materials to both neutron irradiation and a hydrogen environment, enabling study on in pile interaction between radiation-induced defects and hydrogen in tungsten. The hydrogen environment was established by releasing hydrogen from vanadium hydride within an irradiation capsule. The hydrogen pressure during irradiation was estimated as 14.2 Torr. Post-irradiation thermal desorption spectroscopy analysis showed increased hydrogen retention in irradiated tungsten compared to unirradiated samples. Two dominant desorption peaks at ∼470 °C and ∼700 °C were observed in irradiated and unirradiated tungsten samples, suggesting similar trapping mechanisms between the two samples. However, an additional desorption peak at ∼800 °C in irradiated tungsten from the hydride capsule suggests an interplay between irradiation induced defects and hydrogen exposure, leading to the formation of additional hydrogen trapping sites. These findings provide critical insights into hydrogen retention in tungsten under fusion-relevant conditions and stimulate future studies to investigate the synergistic effects of neutron irradiation and hydrogen exposure.
| Original language | English |
|---|---|
| Article number | 149948 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 149 |
| DOIs | |
| State | Published - Jul 18 2025 |
Funding
This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (https://www.energy.gov/doe-public-access-plan).This work was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences, under contract DE-AC05-00OR22725 with UT-Battelle, LLC, JSPS KAKENHI Grant Number JP JP23K22471, the Institute for Materials Research, Tohoku University, under contract number NFE-13-00416 and the U.S./Japan FRONTIER collaboration project on fusion research and development. A portion of this research used resources at the HFIR, a Department of Energy Office of Science User Facility operated by the ORNL and was performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 202312-IRKMA-0202). This work was supported by the U.S. Department of Energy , Office of Fusion Energy Sciences , under contract DE-AC05-00OR22725 with UT-Battelle, LLC , JSPS KAKENHI Grant Number JP JP23K22471 , the Institute for Materials Research, Tohoku University , under contract number NFE-13-00416 and the U.S./Japan FRONTIER collaboration project on fusion research and development. A portion of this research used resources at the HFIR, a Department of Energy Office of Science User Facility operated by the ORNL and was performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 202312-IRKMA-0202). This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( https://www.energy.gov/doe-public-access-plan ).
Keywords
- Hydride
- Hydrogen trapping
- Thermal desorption spectroscopy
- Tungsten