# Lithium precoating retains less fuel than powder injection in fusion study

> The US Department of Energy highlighted research on deuterium retention in the DIII-D tokamak on 15 October. Samples precoated with lithium retained less fuel than samples exposed to lithium-powder injection during operation.

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- Publisher: Newsverum
- Section: Energy
- Country: United States
- Published: 2026-10-16T10:36:25+00:00
- Updated: 2026-10-16T10:36:25+00:00
- Source review period: 2026-10-16
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The nine-institution study also points to the importance of avoiding lithium buildup in cold wall regions. The findings come from a 2025 Nuclear Materials and Energy paper, rather than a new commercial reactor result. Researchers plan further work on what happens when lithium and fuel deposits melt.

## Data

### Fusion materials research

Comparison of lithium application methods

Methodology: Date of the department research highlight; underlying paper dated 2025, experiment day unspecified. Not commercial production data.

| date | label | description | status |
|---|---|---|---|
| 2026-10-15 | Fusion materials research | Comparison of lithium application methods | occurred |

Sources: <https://www.energy.gov/science/fes/articles/limiting-fuel-retention-lithium-future-fusion-devices> · Download data: [JSON](https://newsverum.com/api/v1/articles/us-doe-lithium-precoating-fusion-fuel-retention-study-2026/data/source-record?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/us-doe-lithium-precoating-fusion-fuel-retention-study-2026/data/source-record?lang=en&format=csv)

## Sources

- [US Department of Energy, Fusion Energy Sciences](<https://www.energy.gov/science/fes/articles/limiting-fuel-retention-lithium-future-fusion-devices>) (Source checked: 2026-10-16; Published: 2026-10-15)

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