U.S. exports of Parts of Nuclear Reactors (HS 840140) totaled $10.3M in August 2026.
Importers of Parts of Nuclear Reactors paid $60K in duties in August 2026, an average duty rate of 3.78% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
10 import shipments a month
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.
ImportsExports
Imports
$1.6MYoY · free account
Exports
$10.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $40.6M of Parts of Nuclear Reactors and exported $120.6M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 840140 — Parts of Nuclear Reactors, so the companies trading it can find you. Be the first supplier listed.
Subheading 2 of 4 in heading 8401
Subheading 840140 · $10.3M of $138.6M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8401400000 | Parts of Nuclear Reactors | $1.6M | 3.78% | 99.50% | $60K |
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 | $10.3M |
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.
Exports · August 2026
destination
Spain and United Kingdom together take 80% of it.
customs district
origin
entry
rate provision · imports
0.5% enters free of duty; duty collected equals 3.78% of imports for consumption.