Includes
Refueling Machines; Ion Chamber Seals; Thermal Barriers; Control Rods; Steam Generators, Pressurized Water; Reactor Vessel Shells; Handling Carts, Hoisting Units, New and Spent Cartridges.

Notes
This class includes all types of nuclear reactors and those items which are specifically designed for use within nuclear reactors, their primary cooling systems, auxiliary fluid systems, special propulsion plant systems, handling and servicing equipment, electrical and control systems, and associated special test and water chemistry control items. Excluded from this class are those items for which more specific classifications are suitable.

Possible NAICS Codes
333998 – All Other Miscellaneous General Purpose Machinery Manufacturing
332410 – Power Boiler and Heat Exchanger Manufacturing
332919 – Other Metal Valve and Pipe Fitting Manufacturing
339999 – All Other Miscellaneous Manufacturing
334290 – Other Communications Equipment Manufacturing

Possible NAICS Codes
236220 – Commercial and Institutional Building Construction
561210 – Facilities Support Services
238220 – Plumbing, Heating, and Air-Conditioning Contractors
238210 – Electrical Contractors and Other Wiring Installation Contractors
562910 – Remediation Services
238290 – Other Building Equipment Contractors
238160 – Roofing Contractors
236210 – Industrial Building Construction
561621 – Security Systems Services (except Locksmiths)
238990 – All Other Specialty Trade Contractors

Description
Electric Services

Possible NAICS Codes
221122 – Electric Power Distribution
221112 – Fossil Fuel Electric Power Generation
221118 – Other Electric Power Generation
811310 – Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
221210 – Natural Gas Distribution
926130 – Regulation and Administration of Communications, Electric, Gas, and Other Utilities
221121 – Electric Bulk Power Transmission and Control
238210 – Electrical Contractors and Other Wiring Installation Contractors

Description
Other Professional Services

Possible NAICS Codes
493190 – Other Warehousing and Storage
541611 – Administrative Management and General Management Consulting Services
541990 – All Other Professional, Scientific, and Technical Services
541690 – Other Scientific and Technical Consulting Services
711510 – Independent Artists, Writers, and Performers
541330 – Engineering Services
541519 – Other Computer Related Services
611430 – Professional and Management Development Training
721110 – Hotels (except Casino Hotels) and Motels
561320 – Temporary Help Services

Description
Expert Witness

Possible NAICS Codes
621111 – Offices of Physicians (except Mental Health Specialists)
541199 – All Other Legal Services
541990 – All Other Professional, Scientific, and Technical Services
541611 – Administrative Management and General Management Consulting Services
541690 – Other Scientific and Technical Consulting Services
531320 – Offices of Real Estate Appraisers
621112 – Offices of Physicians, Mental Health Specialists
541330 – Engineering Services
541930 – Translation and Interpretation Services
541618 – Other Management Consulting Services

Includes
LITIGATION AND LEGAL ANALYSIS RELATED TO ENVIRONMENTAL ISSUES

Possible NAICS Codes
541620 – Environmental Consulting Services
562910 – Remediation Services
541611 – Administrative Management and General Management Consulting Services
541330 – Engineering Services
541690 – Other Scientific and Technical Consulting Services

Includes
Anti-intrusion Alarm Systems; Foghorns; Gongs; Chimes; Bells; Burglar Alarm Systems; Fire Alarms; Police Alarm Systems; Sounding Devices; Manual Gas Alarms; Landing Wands.

Excludes
Loran; Radar; Sonar; Engine Oil and Fuel Warning Devices; Aircraft Oxygen Warning Devices.

Possible NAICS Codes
561621 – Security Systems Services (except Locksmiths)
334290 – Other Communications Equipment Manufacturing
335311 – Power, Distribution, and Specialty Transformer Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing
334512 – Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
334220 – Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
333120 – Construction Machinery Manufacturing
541519 – Other Computer Related Services
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing

Includes
All components which contain or simulate nuclear active materials.

Excludes
End items, such as bombs, projectiles, warheads, and the like.

Possible NAICS Codes
325180 – Other Basic Inorganic Chemical Manufacturing
541690 – Other Scientific and Technical Consulting Services
562211 – Hazardous Waste Treatment and Disposal
333995 – Fluid Power Cylinder and Actuator Manufacturing
325920 – Explosives Manufacturing
221113 – Nuclear Electric Power Generation