Spending · subcategory
Nuclear weapons & atomic energy defense
Nuclear weapons, naval reactors, and defense nuclear cleanup at the Department of Energy. Part of National defense. FY2025 net outlays: $36.6B, 4% of the category and 0.52% of all federal spending. The largest program is Nuclear weapons (NNSA) ($18.9B).
$36.6B
FY2025 net outlays
4%
of National defense
+4.7%
change from FY2024 ($34.9B)
12
programs (accounts) with FY2025 spending
Every program
12 accounts with FY2025 spending in Nuclear weapons & atomic energy defense, largest first. Hover or tap a bar for details.
Mandatory (set by standing law)Discretionary (set by yearly appropriations)
How the total adds up
| Programs (the 12 accounts above) | $36.6B |
| Net outlays, matching OMB Historical Table 3.2 | $36.6B |
All programs, sortable
Sparklines show each program in 2025 dollars, FY2000–2025.
| Program | Type | FY2024 | FY2025 | Change | FY2000–2025 |
|---|---|---|---|---|---|
| Nuclear weapons (NNSA) National Nuclear Security Administration | Discretionary | $18.0B | $18.9B | +5.4% | |
| Defense Environmental Cleanup Environmental and Other Defense Activities | Discretionary | $7.32B | $7.63B | +4.2% | |
| Energy Employees Occupational Illness Compensation Fund Office of Workers' Compensation Programs | Mandatory | $2.69B | $3.08B | +15% | |
| Defense Nuclear Nonproliferation National Nuclear Security Administration | Discretionary | $2.75B | $2.70B | −2.0% | |
| Naval Reactors National Nuclear Security Administration | Discretionary | $1.87B | $1.97B | +5.6% | |
| Other Defense Activities Environmental and Other Defense Activities | Discretionary | $1.02B | $1.12B | +11% | |
| Federal Salaries and Expenses National Nuclear Security Administration | Discretionary | $501M | $519M | +3.6% | |
| Nuclear Energy Energy Programs | Discretionary | $331M | $243M | −27% | |
| Administrative Expenses, Energy Employees Occupational Illness Compensation Fund Office of Workers' Compensation Programs | Mandatory | $134M | $142M | +6.0% | |
| Formerly Utilized Sites Remedial Action Program Corps of Engineers--Civil Works | Discretionary | $250M | $127M | −49% | |
| CDC-wide Activities and Program Support Centers for Disease Control and Prevention | Mandatory | $51M | $52M | +2.0% | |
| Salaries and Expenses Defense Nuclear Facilities Safety Board | Discretionary | $44M | $44M | +0.0% |
Nuclear weapons & atomic energy defense since 1993
Net outlays in 2025 dollars, fiscal years 1993–2025.