Californium-252 Neutron Source from Mexico
Californium-252 sealed sources emit neutrons for industrial applications like moisture gauging and reactor startup. Classified under HTS 2844.43.00.21 as it contains the specifically listed isotope californium-252. These are chemically defined radioactive isotopes per Chapter 28 notes.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• File NRC Form 741 at least 7 days before import; high specific activity requires Type B packaging
• Include dosimetry reports and decay chain analysis in import documentation
• Confirm exemption from other chapters via specific activity >74 Bq/g documentation