U.S. imports of Isotopic Separation Machinery, Apparatus & Parts (HS 840120) totaled $5.0M in August 2026, imported from 9 countries.
Importers of Isotopic Separation Machinery, Apparatus & Parts paid $749K in duties in August 2026, an average duty rate of 10.01% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Isotopic Separation Machinery, Apparatus & Parts imports of $5.0M in August 2026 ran 14% above the year-to-date monthly average of $4.4M.
Last updated: August 2026 dataIsotopic separation equipment — used in uranium enrichment and the production of medical or industrial isotopes — is classified under a single US tariff line (8401200000) and is subject to NRC export and import controls given its direct relevance to nuclear nonproliferation. Centrifuge cascades, gaseous diffusion equipment, and laser-based separation systems all fall within this heading, making precise technical documentation critical at entry. Trade in this category is highly specialized, with transactions typically occurring between government-affiliated entities or licensed nuclear fuel cycle operators.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
27 import shipments a month
The heading covers machinery and apparatus used to separate isotopes of any element, including uranium enrichment centrifuges, gaseous diffusion equipment, and electromagnetic or laser separation systems, as well as parts for such machinery. Both civilian fuel-cycle and medical-isotope production equipment may fall here depending on design.
Yes. Isotopic separation machinery is subject to NRC import licensing and is also controlled under the Nuclear Suppliers Group guidelines. Importers should verify that the foreign supplier holds appropriate export authorization from its home country and that the US importer holds any required NRC license before arranging shipment.
Subheading 2 of 4 in heading 8401
Subheading 840120 · $5.0M of $16.2M
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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 |
|---|---|---|---|---|---|
| 8401200000 | Isotopic Separation Machinery, Apparatus and Parts | $7.5M | 10.01% | 100.00% | $749K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8401200000 | Isotopic Separation Machinery, Apparatus and Parts | $90K |
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
$5.0MYoY · free account
Exports
$90KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $43.6M of Isotopic Separation Machinery, Apparatus & Parts and exported $1.8M.
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
Netherlands and Germany together supply 99% of it.
customs district
destination
entry
rate provision · imports
duty collected equals 10.01% of imports for consumption.