Document: NRC Regulatory Guide
Document ID: 50995365-d97f-4101-970a-378af6b5374b
Document Type: regulatory_guide
Title: Qualification of Fiber-Optic Cables, Connections, and Optical Fiber Splices for Use in Safety Systems for Production and Utilization Facilities (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2505/ML25052A253.pdf
Revision Date: 2025-08
Chapter: 
Section ID: RG-1.257
CFR Part: 
CFR Title: 

Content:
ts reflects an international perspective on what constitutes a high level of safety. To inform its development of this RG, the NRC considered IAEA Safety Requirements and Safety Guides pursuant to the Commission’s International Policy Statement (Ref. 26) and Management Directive and Handbook 6.6, “Regulatory Guides” (Ref. 27). The following IAEA Safety Guide and International Electrotechnical Commission (IEC)/IEEE Standard were considered in the development of this RG: RG 1.257, Rev. 0, Page 8 • IAEA Specific Safety Guide No. SSG-69, “Equipment Qualification for Nuclear Installations,” issued 2021 (Ref. 28) • IEC/IEEE Std. 60780-323, Edition 1, 2016-02, “IEC/IEEE International Standard—Nuclear facilities—Electrical equipment important to safety—Qualification” (Ref. 29), which was created based on a collaborative international effort to harmonize standard qualification practices developed from IEC 60780:1998, “Nuclear Power Plants—Electrical Equipment of the Safety System—Qualification,” issued October 1998 (Ref. 30), and IEEE Std. 323-2003, “IEEE Standard for Qualifying Class 1E Electrical Equipment for Nuclear Power Generating Stations” (Ref. 31). Documents Discussed in Staff Regulatory Guidance This RG endorses, in part, the use of one or more codes or standards developed by external organizations, and other third-party guidance documents. These codes, standards and third-party guidance documents may contain references to other codes, standards or third-party guidance documents (“secondary references”). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then licensees and applicants must comply with that standard as set forth in the regulation. If the secondary reference has been endorsed in an RG as an acceptable approach for meeting an NRC requirement, then the standard constitutes a method acceptable to the NRC staff for meeting that regulatory requirement as