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Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

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Standards Development Organizations

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SDO Acronym
Acoustical Society of America ASA*
American Chemical Society ACS
American Concrete Institute ACI*
American Institute of Chemical Engineers AICHe*
American Institute of Steel Construction AISC*
American National Standards Institute ANSI
American Nuclear Society ANS*
American Public Health Association APHA
American Petroleum Institute API*
American Nuclear Society ANS*
American Society of Civil Engineers ASCE*
American Society of Mechanical Engineers ASME*
American Society of Non-Destructive Testing ASNDT*
American Society for Quality ASQ*
ASTM International (formerly, American Society for Testing and Materials) ASTM*
American Water Works Association AWWA*
American Welding Society AWS*
Crane Manufacturers Association of America CMAA
Diesel Engine Manufacturers Association DEMA
Health Physics Society HPS*
Heat Exchanger Institute, Inc. HEI
IEEE (formerly, Institute of Electrical and Electronic Engineers) IEEE*
Insulated Cable Engineers Association ICEA
International Commission on Radiological Units and Measurements ICRU
InterNational Electrical Testing Association NETA*
International Electrotechnical Commission IEC
International Organizations for Standardization ISO
Institute of Nuclear Materials Management INMM*
International Society of Automation (formerly, Instrument Society for Measurement and Control, Instrument Society of America) ISA*
Manufacturers Standardization Society of the Valve and Fittings Industry MSS
National Association of Corrosion Engineers NACE*
National Concrete Masonry Association NCMA
National Council on Radiation Protection and Measurements NCRP
National Electrical Manufacturers Association NEMA*
National Fire Protection Association NFPA*
Underwriters Laboratories UL*

*ANSI Accredited

Page Last Reviewed/Updated Tuesday, June 24, 2025

Page Last Reviewed/Updated Tuesday, June 24, 2025