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HSChapter 84
U.S. imports of parts of nuclear reactors (HS 840140) totaled $1.3M in April 2026, traded with 11 countries.
Importers of Parts of Nuclear Reactors paid $93K in duties in April 2026 — an effective duty rate of 7.5% on $1.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts of Nuclear Reactors imports of $1.3M in April 2026 ran 30% below the year-to-date monthly average of $1.8M.
Last updated: April 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.
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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| Country | Imports | Exports | Balance |
|---|---|---|---|
| SLOVENIA | -- | $5.8M | +$5.8M |
| CANADA | $16K | $896K | +$880K |
| SWITZERLAND | $892K | $13K | -$879K |
| BELGIUM | -- | $475K | +$475K |
| SWEDEN | $273K | -- | -$273K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8401400000 | PARTS OF NUCLEAR REACTORS | $1.3M | 7.45% | $93K |
PARTS OF NUCLEAR REACTORS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8401400000 | PARTS OF NUCLEAR REACTORS | $7.4M |
PARTS OF NUCLEAR REACTORS
174 t
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| New Jersey | -- | $5.8M | +$5.8M |
| New Mexico | $892K | -- | -$892K |
| Texas | -- | $891K | +$891K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| BALTIMORE, MD | -- | $5.8M | +$5.8M |
| EL PASO, TX | $892K | -- | -$892K |
| DETROIT, MI | -- | $567K | +$567K |