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:
rence 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 described in the specific RG. If the secondary reference has neither been incorporated by reference into NRC regulations nor endorsed in an RG, then the secondary reference is neither a legally binding requirement nor a “generic” NRC approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. RG 1.257, Rev. 0, Page 9 C. STAFF REGULATORY GUIDANCE The guidance in IEEE Std. 1682-2023 provides an acceptable approach to the NRC staff for meeting the NRC’s regulatory requirements for the qualification of fiber-optic cables, connections, and optical fiber splices in safety systems in production and utilization facilities, subject to the following. 1. This RG does not endorse Section 2, “Normative references,” of IEEE Std. 1682-2023. The following RGs contain additional information: • RG 1.63 endorses IEEE Std. 317, with clarifications. • RG 1.89 endorses IEC/IEEE 60780-323, with clarifications. • RG 1.100 endorses IEEE Std. 344, with clarifications. • RG 1.189 endorses IEEE Std. 1202, with clarifications. • RG 1.248 endorses IEEE Std. 1205. 2. Revise the fifth paragraph in Section 4, “Principle qualification criteria,” of IEEE Std. 1682-2023 to remove reference to extreme natural events and severe accident conditions, such that it reads: Degradation with time followed by exposure to environmental extremes of temperature, pressure, humidity, radiation, vibration, and if applicable, chemical spray and submergence resulting from a design basis event (DBE) can precipitate common-cause failures of fiber optic cable and/or connection