G/TBT/N/USA/2286

3 June 2026

(26-4077)

Committee on Technical Barriers to Trade

Original: English

1.

Notifying Member: UNITED STATES OF AMERICA

If applicable, name of local government involved (Articles 3.2 and 7.2):

2.

Agency responsible:

Nuclear Regulatory Commission (NRC) [2319]

3.

Notified under Article 2.9.2 [ ], 2.10.1 [ ], 5.6.2 [ ], 5.7.1 [ ], 3.2 [ ], 7.2 [ ], Other [X]: This guidance serves as an acceptable method for demonstrating compliance with NRC regulations and endorses updated international standards (IEC/IEEE 63332 387:2024 and IEEE 2420-2019) regarding design and qualification criteria for the application and testing of onsite emergency Alternating Current (AC) power sources in nuclear facilities.

4.

Products covered (HS codes or national tariff lines. ICS numbers may be provided in addition, where applicable): Emergency alternating current (AC) power source testing; Test conditions and procedures in general (ICS code(s): 19.020); Nuclear power plants. Safety (ICS code(s): 27.120.20)

5.

Details of notified document(s) (title, number of pages and languages, means of access): Draft Regulatory Guide: Application and Testing of Onsite Emergency Alternating Current Power Sources in Production and Utilization Facilities; (2 page(s), in English), (25 page(s), in English)

Link to notified document(s) and/or contact details for agency or authority which can provide copies upon request:

https://members.wto.org/crnattachments/2026/TBT/USA/26_02909_00_e.pdf

https://members.wto.org/crnattachments/2026/TBT/USA/26_02909_01_e.pdf

6.

Description of content: Draft guide; request for comment - The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment draft regulatory guide (DG), DG-1477, ''Application and Testing of Onsite Emergency Alternating Current Power Sources in Production and Utilization Facilities.'' This DG is proposed Revision 5 of Regulatory Guide (RG) 1.9 with a new title. The proposed revision to the RG provides guidance that the staff of the NRC considers acceptable to comply with the NRC regulations for onsite emergency alternating current (AC) power sources in production and utilization facilities. These power sources include emergency diesel generators (EDGs), combustion turbine generators (CTGs) and other types of onsite emergency AC power sources.

7.

Objective and rationale, including the nature of urgent problems where applicable: Protection of human health or safety

8.

Relevant documents:

91 Federal Register (FR) 33003, 2 June 2026:

https://www.govinfo.gov/content/pkg/FR-2026-06-02/html/2026-10978.htm

https://www.govinfo.gov/content/pkg/FR-2026-06-02/pdf/2026-10978.pdf

https://www.nrc.gov/docs/ML2600/ML26007A205.pdf

This draft guide; request for comment is identified by Docket Number NRC-2026-0826. The Docket Folder is available on Regulations.gov at https://www.regulations.gov/docket/NRC-2026-0826/document and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number.

9.

Proposed date of adoption: To be determined

Proposed date of entry into force: To be determined

10.

Provision of comments

Final date for comments: 2 July 2026

[ ] 60 days from notification

WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 2 July 2026. Comments received by the USA TBT Enquiry Point from WTO Members and their stakeholders will be shared with the NRC and will also be submitted to the Docket on Regulations.gov if received within the comment period.

Contact details of agency or authority designated to handle comments regarding the notification:

Please submit comments to: USA WTO TBT Enquiry Point, Email: usatbtep@nist.gov