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HSChapter 84
U.S. exports of parts of nuclear reactors (HS 840140) totaled $20.0M in July 2026.
Importers of Parts of Nuclear Reactors paid $5K in duties in July 2026 — an effective duty rate of 0.2% on $2.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts of Nuclear Reactors imports of $2.4M in July 2026 ran 61% above the year-to-date monthly average of $1.5M.
Last updated: July 2026 dataReactor pressure vessels, control rod drive mechanisms, primary coolant pumps, and other structural or mechanical components that are purpose-built for nuclear reactors classify under tariff line 8401400000 rather than under the more general machinery parts headings. NRC import controls apply when components contain or are designed to handle nuclear materials, and the agency's 10 CFR Part 110 framework governs which parts require advance licensing. Importers should be prepared to demonstrate that a given component is specifically designed for nuclear reactor service, as that nexus determines classification here versus a competing heading.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
8 shipments/mo
Classification under 8401400000 requires that the part be specifically designed or adapted for use in a nuclear reactor. General-purpose valves, pumps, or heat exchangers that happen to be installed in a reactor but are not nuclear-specific may instead classify under their respective functional headings. Detailed technical specifications and the manufacturer's intended-use documentation are key to resolving such disputes.
Not all parts require an NRC import license; the requirement depends on whether the component contains nuclear material or is specifically listed under 10 CFR Part 110. Structural or mechanical parts that do not involve nuclear material may clear customs without an NRC license, though exporters in the country of origin may still face their own nuclear export controls.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8401400000 | Parts of Nuclear Reactors | $2.4M | 0.20% | 89.64% | $5K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8401400000 | Parts of Nuclear Reactors | $20.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$2.4MYoY · Pro
Exports
$20.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
United Kingdom and Spain together take 97% of it.
customs district
origin
entry
rate provision · imports
10.4% enters free of duty; the effective duty rate is 0.20%.