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HTSUS, United States

8401.40.00.00

Parts of nuclear reactors

Classification path

  1. Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof
  2. Parts of nuclear reactors

Rates of duty

General (MFN)
3.3%
Column 2Cuba, North Korea, Russia, Belarus
45%
Unit of quantity
t

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 8401

About heading 8401

Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof

Heading 8401 covers nuclear reactors, machinery and apparatus for isotopic separation, non-irradiated fuel elements (cartridges), and parts of these goods. It splits into four lines: complete reactors, isotopic separation machinery and its parts, fuel elements and their parts, and parts of reactors. Irradiated fuel elements are not classified here.

Full guide to heading 8401

Products in this heading

  • Complete nuclear reactor unit for power generation
  • Gas centrifuge used for uranium isotopic separation
  • Non-irradiated uranium fuel assemblies for a reactor
  • Non-irradiated fuel cartridges for a research reactor
  • Parts of an isotopic separation apparatus, such as its rotor assemblies
  • Reactor pressure vessel internals classified as parts of nuclear reactors
  • Control rod drive mechanisms entered as parts of nuclear reactors

Frequently asked questions

What is the HTS code for a nuclear reactor?

Complete nuclear reactors are classified under 8401.10.00.00, with a general (MFN) duty rate of 3.3%.

What is the duty on machinery for isotopic separation?

Machinery and apparatus for isotopic separation, and parts thereof, fall under 8401.20.00.00 at a general (MFN) rate of 2.6%.

How do I classify non-irradiated fuel elements?

Non-irradiated fuel elements (cartridges) and their parts are classified under 8401.30.00.00 at a general (MFN) rate of 3.3%. Parts of nuclear reactors themselves go under 8401.40.00.00, also at 3.3%.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 8401.40.00.00: Parts of nuclear reactors, 3.3% duty | HTSBase