What project 126 buys
Supports Executive Order 14369 (18 Dec 2025) Ensuring American Space Superiority. This project develops foundational space nuclear technologies and explores the military utility of nuclear reactors to enable responsive and adaptive national security space operations.
Project 126 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 0.0 |
| FY2026 | Enacted | 0.0 |
| FY2027 | Request | 100.0 |
| FY2028 | Outyear | 0.0 |
| FY2029 | Outyear | 0.0 |
| FY2030 | Outyear | 0.0 |
| FY2031 | Outyear | 0.0 |
1 accomplishment / planned program
The R-2A exhibit — the only level of the budget that describes work that has not happened yet. Activities carry the prior, current and budget year only, no five-year plan. Coverage is partial across the corpus, so count activities, never total them.
FY2027 planned work Work with the Interagency to address key technical risks associated with space nuclear power and mitigate them by maturing the technology to enable nuclear power generation in space for Department mission capabilities.
FY2026 to FY2027 change Increase of $100M to support new Initiative for American Space for Department mission capabilities.