Nuclear Reactor Internals Upper Guide Structure
A lattice framework installed above the reactor core to align and guide control rods and fuel assemblies during refueling operations. Falls under HTS 8401.40.00.00 as reactor internals designed for precise positioning under irradiation conditions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If general fabricated steel structures
Non-nuclear lattice frameworks classify under other structures of iron/steel.
If for prototype or research reactor use
Experimental nuclear machinery may classify under unspecified machines.
If imported with turbo-generator components
Parts of turbines designed for nuclear steam service shift headings.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Submit computational fluid dynamics (CFD) analysis proving hydraulic performance
• Certify materials to ASTM A240/A182 for nuclear service with delta ferrite control
• Avoid bulk stainless steel structure classification by documenting irradiation testing
Related Products under HTS 8401.40.00.00
Nuclear Reactor Pressure Vessel
A massive cylindrical steel vessel designed to contain the reactor core, coolant, and heat generated during nuclear fission in a pressurized water reactor (PWR). It falls under HTS 8401.40.00.00 as a critical structural part of nuclear reactors, essential for maintaining high-pressure conditions and safety containment.
Reactor Core Shroud
A stainless steel cylindrical assembly surrounding the nuclear fuel assemblies in boiling water reactors (BWRs), directing coolant flow and providing radiation shielding. Classified under HTS 8401.40.00.00 as it is a specialized internal structural component unique to nuclear reactor design.
Reactor Vessel Head Penetration Adapter
Forged adapter forgings that provide pressure-tight seals for control rod drive mechanisms penetrating the reactor vessel head. Essential nuclear reactor part under HTS 8401.40.00.00 for maintaining vessel integrity.
Nuclear Fuel Assembly Flow Skirt
Bottom flow distributor attached to fuel assemblies ensuring proper coolant distribution across the core. Part of nuclear reactors under HTS 8401.40.00.00 when supplied as reactor replacement component.
Reactor Coolant Pump Casing
High-pressure casing housing the impeller of primary coolant circulation pumps in nuclear power plants. Falls under HTS 8401.40.00.00 as part of the reactor coolant pressure boundary system.
Containment Penetration Sleeve
Sleeve assemblies providing pressure-tight, seismic-qualified penetrations through reactor containment structures for piping and cabling. Essential nuclear reactor safety part under HTS 8401.40.00.00.