Californium-252 Neutron Source from Japan
Californium-252 metal sources encapsulated for neutron radiography, well logging, and PGNAA analysis, featuring high neutron emission rate from spontaneous fission. HTS 2844.43.00 covers this transplutonium element (atomic no. 98) compound.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Report neutron emission rate (typically 2.3×10⁶ n/s-μg) and half-life (2.645 years)
• Include americium-252 impurity levels (<2%) in isotopic analysis
• Criticality safety index must not exceed 10 for most packages